To paraphrase Dr. McCoy from Star Trek: "Damn it Jim, I'm an engineer/photographer, not an eye doctor!" ;-)
So while my layman's research/experience may be helpful/informative, please consult a medical professional for your personal situation.
Scroll down for full details, but since the 2011 surgery, I continue to see well and am glad with the choices I made and the results.
While I've been fortunate to have had good health, my eyes have
always been a bit of a problem. As a child, I was quite near-sighted (ending up around -7 diopters of myopia- i.e. is that an "E"? ;-) but this was correctable
via glasses and (later on) contacts. Fortunately, I did not have much
astigmatism (which is harder to correct, especially in contacts) and my vision
was fairly stable from ~20 to age 40.
One "nice" thing about being so Myopic is that without glasses/contacts, I can focus very close.
I did consider having Lasik, but the combination of high Myopia and
thin Cornea meant I was a borderline case. In contrast, my wife Wendy at
-3 diopters had Lasik done in 2002 by Dr. Donald J. Keller of Boulder Eye Surgeons
our neighbor across the street) and she had excellent results.
Around age 40, it slowly started becoming more difficult to focus (when
wearing correction) at close distances, especially in low light.
This is a very common condition called
which is due to your crystalline lens becoming less elastic.
This loss of accommodation is analogous to camera lens that won't focus close.
So I started wearing reading
glasses (when wearing contacts) or a different glasses prescription for computer/close-in work.
Wendy made fun of me, but I said "wait until your turn" and yes, a few years
later, she had to start wearing reading glasses - her distance vision
In 2010 (age 46), I noticed that my right eye had more difficulty
seeing things. I had been told it had a "small" cataract, but these
can often exist for years with no impairment of vision.
Unfortunately, I had a Posterior Subcapsular Cataract - these "grow" faster,
are more prevalent in younger people, and cause
greater visual degradation due to the location at the rear of the visual axis.
Because of the cloudiness, you are no longer able to correct to 20-20.
An analogy would be a blown window that now has a permanent haze.
In addition, the cataract causes a "Myopic Shift" which means
increased spherical power (also noticeable via reduced
minimum focusing distance) and
astigmatism - i.e. a new pair of glasses/contacts every several months which
is a bit of a PIA. Cataracts typically don't interfere with vision and lifestyle until
age 70 or later ... so it kinda sucks to have it happen to me a few decades early - darn!
I'm a bit of a photographer who analyzes camera gear (and shoots
with my right eye - bummer!), so I'm aware that image
quality encompasses more than just seeing "20-20" on the eye chart.
I check the
and will often see various visual defects in my pictures such as
Chromatic Aberration that might not be apparent to others - sometimes it's not good to know more. Being an Engineer, I'd periodically
"test" my vision and needless to say, even pre-Cataract, I knew it wasn't sharp
as it could be, but you just have to manage with the eyes you get.
Even with best correction, the cataract impairs the vision and causes all
sort of visual aberrations beyond just blurriness due to the cloudy lens.
Point sources of light are "replicated" (as seen below) and high-contrast
or low-light situations are difficult. Interesting enough (to me at least!) is
that with one "good" and one "bad" eye, it's fairly easy for me to compare
the visual degradation. It's amazing how the brain is able to "filter/figure"
out the "bi-polar" vision (up to a point) but it requires a lot of "work" to see
and I often get visual fatigue.
Below is an image that simulates (as of July/2011) the difference I see between the left and right eye - HEY, less wrinkles with the later! ;-)
Simulation of my vision - mouseover or click image to see what it looks like through the Cataract in the right eye
When a cataract is fully "mature" (mine was grade 2+), you can actually see them as an
opaqueness on the eye ... but needless to say, by then they are causing
a severe decrease in vision.
While I'm fortunately not there (yet!), I wondered if (using my Canon 7D
and (poor man's Macro) 18-200 lens) I could take a picture of my eyes to see the cataract.
The only light is from the three windows and I don't see any opaqueness ...
but it was amazing to me how much clearer (10 year old) Kyle's eye was
than mine. I think (!) the right eye looks more cloudy, but obviously a
much more appropriate examination/determination would be done by an Opthamologist using a slit lamp looking at dilated eyes.
Alek's Left/Right Eye and 10-year old Kyle's right Eye ... all non-dilated and lit from windows
Cataract Surgery has been around for thousands of years
but fortunately, we
have advanced from sticking needles and/or using extreme pressure on the eye!
A British surgeon noticed after WWII that Plexiglas from Spitfire canopies
was inert in the eyes of fighter pilots and figured out it could be used
as an Intra-Ocular Lens (IOL). Cataract surgery is now fairly routine
(several million operations a year in the US) and basically involves making
a small (~3mm) incision into the capsule of the eye, inserting a "chopper"
to break up the lens, and then sucking it out - this process is called
phacoemulsification. An IOL is then inserted into the capsule which unfolds
and replaces your old lens. Total time for
the entire operation is usually less than 10 minutes!
As with any surgery, there can be complications as infection is
always a risk, the capsular bag may break, the IOL power can be mis-calculated,
the IOL can be mis-placed or subsequently move, dry eyes, and in the worst case scenario, you can (basically) lose your vision. These are all rare
and in many cases, vision can be restored to at least close to 20-20.
But recall that accommodation (or focus) is done by your eye's Ciliary muscles moving your natural lens ... which has now been replaced. So until about
10 years ago, IOL's were "mono-focal" - i.e. you could see 20-20 distance, but
had no ability to focus at Intermediate or Close-in. Therefore, you'd still
need to wear glasses for reading, and the fuzziness at Intermediate distances
would affect your day-to-day life.
In the last decade, two competing technologies have tried to address this shortcoming.
Multi-Focal lens are basically concentric rings of far/close focus so two
images are presented to the brain and it is able to "pick" the sharp one
depending on if you are looking far or near. Advantages are that you have
a good chance of seeing well at far and near. Disadvantages are that your
Intermediate will be fuzzy, and high contrast situations can be difficult
with halos and glare. As an engineer, this is obviously a compromise
solution ... but if no perfect solution is available, one often uses
what is available/works ... and Multi-Focals are commonly used today.
The other approach is Accommodating Lens which uses the eye's own Ciliary Muscles
(which focus your natural lens) to change focus. Obviously this
would be the "Holy Grail" of IOL's ... if it works. As of 2011, the
Bausch and Lomb Crystalens is the only accommodating IOL to have FDA approval.
There seems to be more variable results with the Crystalens, but ideally,
you should end up with excellent vision at Far and Intermediate, but you almost
certainly will need Reading Glasses for close-up work.
I.e. If all goes well with the Crystalens, you will have at least a diopter of
accommodation and be able to go glasses-free for most day-to-day life, but
need glasses for reading. Because it's not a compromise solution, halo/glare is less of an issue and I would expect better low-light vision than multi-focals.
It's interesting talking to Eye Doctors as there definitely are
Multi-Focal and Accommodating "camps" with both believing their solution
is the best and the other is (basically) no good. So as a layman (or
at best a eye-doctor-wanna-be), it's quite confusing who to believe and select an option.
And what is really a bummer is that there is lots of research (and money!)
in this area
so even a couple of years from now, there probably will be other options.
For example, Synchrony and Tetraflex are two lens awaiting FDA approval
that claim greater accommodation. Femtosecond Lasers may soon be the
new scalpel in eye surgery, offering more precision and consistent results.
My guess is that by time I'm 70 (when most people start to be
affected by Cataracts), technology will progress such that
Accommodating Lens with multiple diopters of accommodation (so you can see
Far/Inter/Near) will probably be commonplace.
In fact, it would not surprise me that (similar to Lasik), refractive
Cataract Surgery becomes popular as an elective option to correct
vision and address Presbyopia.
Note that you really do NOT want to remove an IOL after it has been in
your eye as the risk of complications goes way up ... so "upgrading" years
later would be difficult. But speaking from first-hand experience, the
degraded vision from the Cataract really affects your lifestyle (and it is
rapidly getting more annoying) so I'd like to do something about it rather
than wait for the "next great thing." People describe Cataract Surgery
as an incredibly positive life-changing experience ... lets hope that
is the case for me.
So what did I decide to do? Turns out that Dr. Don Keller (who you may
recall did my wife's Lasik) is huge fan of the Crystalens ... and was
actually the first Doctor in Colorado to use 'em. So he obviously has a lot of
experience doing them ... and while Cataract surgery is fairly routine, there
certainly is a skill/experience element involved. He also spent a lot of time
with me discussing the various pros/cons/aspects of Cataract Surgery.
I'm OK with wearing glasses for reading, but it would sure be nice to
see 20-20 (or better!) at Far/Intermediate for sports and normal day-to-day life ... and hopefully no halo/glare at night.
So Crystalens seems to be the right choice for me at this time.
Some additional concerns are that due to my high Myopia, I'll have an
even higher risk of Retinal Detachment during my lifetime. Also, I will
probably have Posterior Capsule Opacity (PCO) sometime soon after the
operation, but this is fixable with a ND:YAG laser that basically burns a hole
in the back of the bag to clear the visual axis.
My astigmatism (pre-cataract) isn't too much, but am hoping that a
Limbel Relaxing Incision (LBI) during the operation may be able to reduce
most of this.
Note that while a Lasik tune-up is possible afterwards, you can't do a
"custom" job after the IOL is in place since it messes up the measurements.
Also, if you have had Lasik BEFORE cataract surgery, it will make the IOL
measurements more difficult ... so it is helpful to have your eye measurements
before you had that done along with the parameters of the Lasik surgery.
Exercising the eye muscles by reading afterwards is highly recommended
to "get/tune" them back into shape with the new accommodating lens and
may take several months.
I should add that while the cataract in the left eye is not interfering
with my vision too much, with -7 diopters of correction, you really
need to have both done to balance things ... plus in dry Colorado,
there is no way I could wear contacts all day long, every day.
So another decision will be whether to do a ~1 diopter offset in the
other eye (i.e. like mono-vision) to provide better near vision ... but
this gives up some clarity at distance along with depth perception.
For similar reasons, I'll want to do the 2nd eye as soon as
possible (one week) after the 1st eye.
Cataract Surgery is covered by insurance, but only for mono-focal lens.
The upcharge for premium lens (multi-focal or accommodating) is about
$2,000 an eye. This is in addition to insurance deductibles, so it's not
cheap ... but since I'm not even 50 yet (and hopefully have some good years
left in me), it would sure be nice to see well after a lifetime of vision issues ... so I plan to have it done after Labor Day, 2011.
While everyone wants 20-20 (or 20-10!) at Far/Inter/Near, that's not
realistic with today's technology and Dr. Keller thinks that
"20-functional" is quite doable.
A very successful outcome for me would
be sharp (good contrast with no halos, glare, etc.) 20-20 vision at
distance and intermediate to 1/2 meter ... i.e. would
be super to get a full 2 diopters of accommodation and he says my
high myopia may help in that area as the football'ness shape of the eye
provides more flexure on the IOL.
As noted before, there are risks with any surgery, but they are pretty low
for Cataract surgery and obviously I hope none of the short or long term
problems crop up for me. One thing I'll have to worry about for life is
retinal detachment ... with high myopia and cataract surgery, it seems this
happens to over 5% of people - not insignificant!
Cataract surgery is often described as life-changing since it restores vision.
And as someone who has always been very near sighted and
needed glasses/contacts all my life (and now has presbyopia),
that hopefully will be the case with me.
So ... thanks for reading this far and I hope it was helpful/informative to 'ya. Wish me luck! ;-)
Aug 19th, 2011:
At the pre-Op appointment, my right eye (w/cataract) best corrected visual acuity (BVCA) was 20-50minus (missed several letters) with a correction
of -7.75 -1.00@155 ... and there is still significant triple vision, especially on point sources of light.
The left eye seemed especially sharp that day and was able to do 20-15
with -7.25 -1.00@012.
When trying to read print at 18", 1.75 diopters of correction were needed to
get to 20-25 ... which is
close to the theoretical maximum of 2 ... so lotsa presbyopia there! ;-)
The Corneal Topography showed 1.12 diopters of astigmatism in the right eye and 0.63 in
the left, so Dr. Keller will perform Limbel Relaxing Incisions (LRI's)
and hopefully reduce most of this.
The IOL calculations recommend an 11 Diopter lens in the right eye that
result in a refraction of -0.16. For the left eye, he may slightly under-correct
the power to allow for a bit more close-in vision depending on how it goes
with the right eye. BTW, my pupil size was ~5mm in a dim examination room.
Biometric information on my eyeballs - click on the image to see in full-res
I'm scheduled to have the right eye done on Monday, September 12th, 2011 and
the left eye a week later ... assuming no complications.
By happy coincidence, my Mom is visiting Boulder, Colorado then, so for the
first operation, it will be nice to have her around to help.
BTW, the main reason for doing the two eyes "only" a week apart
is that it will be very difficult to live/function
with the right eye corrected and the left eye still needing over 7 diopters
of correction ... talk about bi-polar vision!
Check back after then for a (hopefully positive) update!
Sat, Sep 10th: I start putting eye drops in the to-be-operated eye. One drop of Zymaxid and Acular/Ketoralac (stings a bit) four times a day. After the surgery, I'll add one drop of Pred Forte (all 5 minutes apart) and after a week post-op, drop back to twice/day for the 2nd week.
Mon, Sep 12th:
I had the right eye done this morning -
here's the op-report.
It seemed to go routine, but my memory isn't that great as I found out
afterwards the Anesthesiologist used Versed initially which impairs memory.
I was then knocked out with
Propofol; literature says you are out in 40 seconds and I counted to
about 20 before I said "here we go."
Dr. Keller said afterwards
I started talking and moving about a bit ... not unusual and overall I handled
the anesthesia well. They woke me back up part way
through the surgery and I was semi-lucid for the last couple of minutes.
Recovery was quick
and my Mom drove me home ... after a Smashburger stop for lunch - yea!
Dr. Keller inserted a Crystalens model AT-52AO 10.5 diopter lens (SN#10-681616) through a 3mm opening - an 1/8" inch!
This is slightly less than the 11.0 power "recommended" from the biometry data.
He explained that as the eye heals, it usually "pulls back" a 1/4 to 1/2
diopter, so he's hoping the 10.5 will result in me ending up plano - i.e.
focus point at infinity when relaxed and hopefully clear 20-20 (or better) vision.
I didn't feel any pain in the eye and the most annoying thing is that the patch
is not opaque ... so you have a "white veil" image coming in from the right eye
that totally messes up your brain when it combines with a "good" image from
the left eye. So I put a "pirate patch" over it to better obscure the
right eye which makes it *much* easier to see - too bad it's not Halloween! ;-)
So far, so good ... the patch comes off Tuesday morning and we'll "see" what
my vision is like.
I get to wear this colorful hospital patch after the Cataract Surgery - it stays on for a day
Pirate Patch makes it easier to see - too bad it's not Halloween as I could go as a Hulk'in Jack Sparrow! ;-)
Tue, Sep 13th:
I had the "morning-after" post-op appointment
with Dr. Keller who removed the patch ... and WOW, I could see ... and good!
There was still some residual dilation and halo, but I was able to get almost
all the letters on the 20-20 distance line ... HOLY COW!!!
This is obviously an excellent sign and after examining my eye, Dr. Keller said
everything looked good and healthy and he'd expect some
improvement in distance vision by the Friday appointment.
I was able to read
(barely) 20-40 in an intermediate vision test 24 hours after my surgery, but
the accommodation can take several months and you don't want to be
Recall I had -7 diopters of myopia so I could focus 5" from my eyeball -
knew I'd lose this ability and will miss it.
Initial impressions are low-light/night vision is improved.
I do see some occasional "shimmering" on bright light sources in my
peripheral vision along with a few dark floaters - I believe both are normal.
Another thing I have noticed is colors are more vibrant plus generally
brighter. This is very common after cataract surgery and is probably due more
to the yellowing of the natural lens with age ... which is pretty subtle as it
"sneaks" up on you less noticeably than the loss of vision.
The human crystalline lens at various ages from Sidney Lerman's "Radiant Energy and the Eye"
The image below gives an idea of how a cataract shifts colors.
I used Photoshop
to simulate this by applying a +15 with Selective Color (Yellow/Yellow)
and -15 on Brightness.
Note that this is based on a direct comparison between my right eye (new lens)
and my un-operated left eye (48 year old natural lens) which did not have a vision impairing cataract. I.e. the cataract was surely causing even more dullness - see what it did to Monet!
Mouseover to see how aging of your natural lens causes yellow hue & general dimness - cataract was doing even more!
There are other subtle color shifts and I've also
seen a few "big" shifts a handful of times ... which may be due to me seeing
some Ultraviolet light that was filtered by my natural lens before ... or maybe
I'm just much more sensitive to the bottom of the visible spectrum around 400nm.
The shift goes away when I used a camera UV filter.
Some info here
an eye surgeon report here
and I'd like to test my
Using an online FM100 Hue test
, I scored an 8 (seems pretty good) with the few errors in the green-blue area.
Here's a picture taken in the shade on a sunny day of my son's Colorado Rockies shorts and other misc.
The camera (and other people) don't see the purple glow - simulated with +20% Red & Blue channel
If I put a UV filter (or a pair of plastic biking glasses) in front of my eyes, the purple glow goes away
Click here to read more details/analysis on the violet glow as seen through a Crystalens
My mom volunteered (!) to take a few closeup pictures of my eyes after the first Cataract Surgery
Note Dr. Don Keller's initials (placed pre-op) next to the right eye
Closeup of right eye - believe that is the Limbel Relaxing Incision (LRI) and entry point at top - click to see lower one
One challenge is that the right eye is now close to 20-20, but the left
eye is still -7 diopters ... so there is a big variance between the
images from the two uncorrected eyes. You'd thinking that wearing glasses
on the left eye would make it better (so now both are close to 20-20),
but in some respects, this makes it more difficult due to the
"Coke Bottle Effect" - i.e. the glasses make the image smaller and create
distortion at the edges - this is called
So this is why I want to do the second eye one week after the first rather
Aniseikonia ("Coke Bottle Effect") simulation - image below is as seen by the right eye with no glasses
Mouseover image to see "resized" in left eye with -7 diopter glasses - yea, that's a problem!
The combined image isn't this "bad" in real life, but still quite the challenge for the brain to sort out
Speaking of how the brain processes visual info, here's one of
many interesting demos.
The areas that "appear" to be blue and green (i.e. different colors) are
actually the same color with RGB values of 0,255,150. Look at the closeup merge
on the right and bottom.
Fri, Sep 16th:
Dr. Keller said everything looked good;
no issues with eye health and shimmering/floaters are normal.
I was able to get most of the 20-15 letters on the distance chart,
although there is a slight ghosting as I still have a diopter of
I'm hoping that will reduce a bit more as the LRI's heal, but
realistically, there will unfortunately be some leftover. This can be addressed
with Lasik ... although doing a surgical procedure
for a slight increase in visual acuity isn't clear-cut.
The 20-15 line was quite sharp when +1.00/-1.00@155 was dialed in and
once you have sharp vision, you can't help but want Superman-sharp! ;-)
We debated whether to go with an 11.0 Crystalens or an 11.5. As mentioned
earlier, one can "offset" the two eyes so you have better closer vision, but
at a loss of distance acuity and depth perception. According to the
calculations, the 11.0 in the left eye would be 0.08 diopter more myopic
than the 10.5 is in the right eye - the 11.5 would be another 0.31 diopters myopic.
My goal is still the same - hoping to have sharp vision at distance with
adequate accommodation for intermediate computer work ... and am willing to
wear reading glasses for close-in.
We decided to go with the 11.0 to match hopefully match the right eye as I
would surely "notice" the mono-vision option.
Recall one main reason I selected the Crystalens was for the
accommodative ability. Using the FAA Eye charts, I'm seeing 20-20
at distance (not quite as good as measured at the eye doctor), 20-40
at an intermediate range of 32" and 20-100/J10 at close-in range of 16".
I'm hoping in the weeks to come to "see" some improvement in those areas.
For comparison, while wearing my (distance) glasses on my (un-operated) left eye,
I see 20-20 at distance, 20-25 at intermediate, and 20-50/J5 at near ... the
accommodation is worse with contacts.
To test my vision, I've been using the FAA Eye charts: Far - Inter/Near - Near
Mon, Sep 19th:
Dr. Keller inserted a Crystalens model AT-52AO 11.0 diopter lens (SN#11-717456)
in my left eye this morning.
It also seemed to go routine - here's the op-report.
I had much better memory of
what happened due to the Anesthesiologist using Remifentanil instead of Versed.
Ironically, one of the side-effects is "itching,
especially around the face" and that is what I felt as I actually asked
Dr. Keller near the end if I could scratch my nose - he said just don't
poke your eye!
So I was much more awake/aware for the operation and could see the tools
and then the lens being inserted in the eye which I thought was cool.
Just before being patched up, I could look out that eye and while the ceiling
artwork looked very dim (Dr. Keller said this is normal), it did appear to
look a bit sharper than at -7 diopters pre-op.
Half an hour out of surgery, my wife had picked me up and we were
heading for lunch - Smashburger again - yea!
I have a bit of a "dull ache" in the left eye (more than I remember in
the right) but nothing alarming.
I was able to "function" around the house (with only one eye of course)
and go for an extended walk around the neighborhood with my wife.
I again used a "pirate" patch to darken the semi-translucent patch ...
so I'm scary looking and can say AYE MATEY! ;-)
So far, so good ... the patch comes off Tuesday morning and we'll "see" what
my vision is like.
Tue, Sep 20th:
I had the "morning-after" post-op appointment with Dr. Keller for the left eye. There was a bit more residual dilation and halo than the right eye (plus I think some of the anti-biotic ointment was still smeared on my eyes), but I could seen distance at 20-30. Overall, a very similar
experience to the one-day post-op on my right eye ... except now I can
simply view the world with both eyes which is GREAT!
Right eye correction didn't change much at +1.00/-1.00@145 so (applying
half of the cylinder power) I'm slightly Hyperopic (means I "lose" some
of the accommodative power) ... but Dr. Keller
thinks I might see a quarter/half diopter pull back which would make
With the correction applied via glasses, the 20-15 line was very clear
plus I got some letters at 20-10, so my visual system is working well - WOOT! ;-)
Closeup of the left eye after Cataract Surgery - believe that is the LRI/entry point at top
The next day, I gathered up all of my glasses and leftover contacts - there's been countless more over the years
Therapeutic and uplifting to see the pile - will donate the glasses and other misc. and toss the rest - don't need 'em anymore! ;-)
Tue, Sep 27th:
Once again, Dr. Keller said everything looked
good and was healing well - always nice to hear that. He said my distance
results were quite good and he'd guess that I might be able to get down to J3
for reading. I mentioned that I can clearly see more astigmatism shift in
my right eye than my left - very noticeable when I compare eyes on letters
and especially on a red alarm clock. As mentioned before, bummer that the LRI
didn't pull more of this out, but one has to be realistic.
I had some +1.50 reading glasses, but picked up a +1.00 (for $3!) so my
eyes will have to work "harder" for intermediate and close-in work.
Spent a good part of the day on the computer without glasses, but I get
tired after a while ... good exercise/training for the Ciliary muscles! ;-)
The refraction for the right eye didn't change much in the 2nd week ... in fact, she originally got the same +1.00,-1.00@145, but Dr. Keller showed that +0.50,-0.75@145 was very similar. The left eye was 0.00,-0.50@180 after one week, but I feel like it sees less astigmatism. Not perfect numbers, but not too shabby!
I still have occasional shimmering in my eye - typically when a strong
light source is at the edge of my vision.
This is called pseudophakic photic phenomena or Dysphotopsia and is
common in Cataract patients, especially initially.
A related phenomena is Negative Dysphotopsia - an occasional dark spot
pops up in my peripheral vision. This
catches my attention - was that a person (or animal/bird) over there! ;-)
Both are due to the different light paths through the intra-ocular
lens (especially the edges) and in many cases, these will go away as the
brain figures out they can be filtered away.
That's been my experience as I hardly see 'em anymore from the right eye,
but still periodically from the left eye, which is one less week post-op.
Dr. Keller says a common occurrence that should go away soon ... so
I basically just try to ignore 'em.
Dr. Keller and I discussed the "violet glow" I mentioned earlier - this is
seen equally on both eyes.
I stopped by a Halloween store yesterday and when looking
at a (fluorescent) black light, it appeared a very bright blue. When I put
some poly-carbonate safety glasses on, it went back to being a dim deep purple.
Several other adults saw the later with no difference with/without the glasses
... and my 13 year old son only saw a very slight difference with/without the glasses.
Medical literature says that the photoreceptors are capable of seeing UV light,
but it's typically filtered by the natural lens, especially as it yellows with
age. So now that my lens has been removed, I'd consider the test case above
fairly conclusive evidence I'm seeing in the UV spectrum. Dr. Keller doesn't
have the right gear to test this and has heard this rarely happening with
the Crystalens and other IOL's - presumably those that don't filter UV.
Read more about the Ultraviolet glow.
Overall, I'm very pleased so far with my Cataract Surgery and
Crystalens implants. There's a few oddities (but I'm very analytical),
but being able to see sharp (!)
without glasses is great and the brightness and vivid color of the
world is fantastic to look at.
Thu, Sep 29th:
I purchased a Black Light to test
my UV vision and I see dramatically different that others in this corner case.
So while I don't have a "Sixth Sense"
that allows me to say "I see dead people"
(!), I'm pretty sure I'm seeing Ultraviolet light! ;-)
This unusual side effect gives me a "superpower" so I need a purple cape!
Read more analysis of my experience seeing Ultraviolet light.
Simulation of how I see in the Ultraviolet - mouseover image to see overlays
Picture taken in the shade on a sunny day
via remote release with a tripod mounted/remote Canon 7D and 17-55/2.8 lens at 1/100 second at F/5.6 and ISO400.
I processed the camera RAW file using default settings of Lightroom with White Balance set to shade.
Since the camera doesn't "see" Ultraviolet light, I had to use Photoshop to simulate my perception of what I visualize.
I selected the "exposed" areas of the Black Light and using Levels, pushed Red to 5, Green to 5, Blue to 9, and RGB to 1.5. Background glow is pushing Blue to 1.15 for the whole image.
The UV bulb is a GE F15T8/BLB which has a peak emission at 368nm and is
typically used in insect traps (bug zappers!) and inspection applications -
spec sheet here.
While I don't know the filtering characteristics of the glasses or UV filter, I see a drastic
difference looking through them at the Black light - others see little/no difference.
Mon, Oct 3rd:
It's been two weeks since the second eye had
the Cataract removed and the Crystalens IOL implanted - continue to test
with the FAA eye charts. A bit discouraging that I
haven't seen more accommodation, but I've read/been told that can take months so not unexpected.
I continue to try to "train/exercise" my eyes by trying not to wear
reading glasses or just the minimum +1.0 power ones ... but it's a challenge
to read in low-light conditions - hopefully I'm not just seeing increased
depth-of-field in good light. Distant vision continues
to be excellent - night driving is soooo much easier with
very minimal halo/glare.
I still see occasional shimmering (usually if my eyes are dilated and a
bright light source is at the periphery of vision) and
hardly ever see (especially negative) Dysphotopsia anymore.
It's been great playing some sports recently as I can see the spin of
the baseball, arc of the frisbee, and trajectory of the football.
A week before my surgery I mountain biked to the top of Rollins Pass and
remember how difficult it was to see coming down as my eyes/brain didn't
seem to be able to process the distorted/fuzzy imagery as I bounced along.
I did some off-trail biking with my younger son today and it was
night-n-day difference ... the world is in focus and just stays that
way without having to "work" on it.
In a similar fashion, stuff such as running around on the frisbee field
and driving are much easier - I'm excited to see what it's like snow skiing
I no longer feel even the occasional "piece-o-sand" in my eyes plus there
is minimal dryness. Another interested aspect is that I think (!)
I can "hear" the world
a bit louder - most notably birds chirping when walking. Perhaps my brain
was working so hard pre-op on deciphering my blurry vision that I just
didn't hear so well ... or (more probably) I'm just imagining it! ;-)
I still have some old habits such as sometimes reaching under
the bed for my glasses when I wake up in the morning - don't need 'em anymore!
And if I'm wearing reading glasses and want to focus even closer, I
periodically look above the glass, since in the old days, my -7 myopic vision
would allow me to focus very close - doesn't work anymore.
Another peculiarity is that the world is not only brighter and more vivid,
When I was wearing glasses, the magnification was outside my eye and
things appeared smaller - remember my "Coke-Bottle" commentary early.
While the image sizes are now matched (thankfully!), I truly do notice
that things look a little bigger than I remember them such as
golf/ping-pong balls and the moon.
Finally, a number people who have read my writeup (and visual examples) of
seeing ultraviolet light have written to say they see exactly that.
So while I'd still love to do some rigorous testing at an optics laboratory,
I'm pretty darn certain now that I'm truly seeing in the UV spectrum.
I continue to sometimes see purple on grey/black items, but at least so far,
this hasn't been annoying and it's more an interesting oddity.
10/13: My son has a small prism that casts rainbow colors which are well highlighted on the kitchen wall.
I put a yellow sticky where I saw the violet color end, and then asked my wife and kids (age 13 & 10) to show me the "end of the rainbow" ... which was less than I saw ... and about the same as the camera sees.
Mouseover image to see wide-angle view of setup
Thu, Oct 27th: Everything went well at my final post-op appointment with Dr. Keller. I was seeing 20-15 distance uncorrected and able to
read the 20-10 line with a little bit of spherical/cylinder added.
Some OD's call this the "whiner appointment" because patients are still
waiting for more accommodation for inter/near vision.
Right now, my mildly presbyopic wife can see better close-up than me, but
it seems like occasionally my eyes "flex" and the computer screen/print
comes into tighter focus, especially if I'm trying without reading glasses ...
but I get "tired" doing that for a while. I sit about a meter away (i.e. 1 diopter) from the
screen and usually try not to use glasses, although I'll put them
on for fine print and when checking images for sharpness.
Dr. Keller said more accommodation is coming, but will be "done" in 3-6 months.
After examining my eyes, he said the posterior of the capsular bag is crystal clear (his OP-report said it was meticulously polished!) so be great if I never
need YAG surgery. I mentioned occasional shimmering, but he felt that
would go away as did the Dysphotopsia. So we're back to annual checkups unless
something unusual happens - it's always good to be medical "boring" and I
continue to enjoy my new eyes! ;-)
Andy Goris at Hewlett-Packard thought my UV vision was worth testing and graciously provided access to a Monochromator in his Lab. This uses an extremely bright light (which requires special cooling) and a diffraction grating to produce a very narrow (10nm) wavelength of light that is projected on a sphere with an exit port for viewing - i.e. this is some pretty serious test equipment!!!
There's more pictures/analysis on the
Ultra Violet page
but in summary, I was able to see down to 340/350nm ... whereas similar aged
people cut-out between 410-430nm.
So this seems to conclusively prove that I'm able to see into the Ultraviolet spectrum.
The Oriel Instruments MS 257 Monochromator emitting at 450nm - note massive cooling radiator for source light
Nov 23rd: Distance vision and general comfort continues
to be good. But I'm a bit disappointed that I have not "seen" more
accommodation ... and in fact, seem to have a bit less than a month ago
with the right eye struggling slightly more at close-in distances.
I use the computer a lot (at an intermediate distance of 1 meter - i.e.
one diopter of accommodation) and putting on +1.0 readers really sharpens
So I don't seem to be getting much actual flexure from the
Cystalens. Note that in bright outdoor light, close-in vision improves,
but this is due to increased depth-of-field from constricted pupils.
Dr. Keller said he was hopeful I would get to
J3 (which would be an awesome improvement from J5) and still feels my
eyes will improve with time.
I continue to spend a bit of time either without glasses or minimal
correction to force my eyes to work, but it makes for slower reading
and can be tiring. On a positive note, I still think it's cool I can
see the alarm clock in the morning and the Colorado mountains (and the
world in general) certainly looks better with sharp distance vision!
No major changes at the 3 month point from what
I wrote a month ago. The right eye seems to have gotten a tiny bit worse
at close-in ... but the left eye is a tiny bit better. Still a bit
disappointed not to have more accommodation ... although
occasionally things seem to snap into better focus ... so maybe
there is some flexure of the Crystalens going on. Overall comfort and distance
vision continues to be good ... and since the days are shorter this time
of the year, it's real nice to be able to see well while driving at night.
I also picked up 400nm and 365nm UV flashlight to "test" my vision more.
While both have leakage into the visual spectrum
(which starts around 400nm), the 365nm light is a faint/pale grey to "normal" people ... whereas I see a bright purple.
So makes for a very easy demo of my ability to see UV.
Here's a picture of them "lighting" a non-fluorescent wall - remember that the camera doesn't "see" UV.
Mar 18th, 2012:
All continues to do well at the 6 months point.
Comfort is good, but recently, I occasionally have dryness/itchiness - mostly in
the left eye, but could be due to allergies. Perhaps related to that is
it seems the left eye "fuzzes out" more frequently ... although this could
also be floaters obscuring the optical path.
Distance vision remains excellent (also at night) with the right eye appearing
to be slight sharper.
In terms of accommodation, the left eye has gotten a bit more, but the
right eye has regressed slightly. Both are less capable in the evenings; perhaps
the muscles are tired at the end of the day.
When looking at the 32" intermediate chart at arm's length (~30")
in good light with +1.0 readers,
the left eye can read 20-15 and the right 20-20 ... my layman's interpretation
is that this is about a 1/2 diopter of accommodation.
Close-up vision in dim light remains a challenge - I need readers to make
out the menus at restaurants unless very good light.
My son had an eye appointment with Dr. Brain Nichols (Dr. Keller's partner) and
he was gracious enough to take a quick look at my non-dilated eyes and said
it looked like a slight amount of posterior capsule opacification with a bit
more in the right eye ... so it's possible this may be contributing.
Finally, an interesting "visual" while taking an evening walk with my wife
tonight as we spotted a
Great Horned Owl in a heavily wooded area. With the fading light, it was very difficult
to pick him (her?) out as the owl's feathers blended in with the branches.
Wendy is an extraordinary wildlife spotter ... and pre-surgery, she
pretty much always saw wildlife before me. But in this case, I actually
was the first one to pick out where the Owl had landed.
I.e. an impressive demonstration of (distance) visual acuity in a cluttered
low-contrast, low-light situation.
Jun 3rd, 2012:
I get quite a few Emails from people about
this webpage - JohnH wrote a particularly interesting one:
Back in the 1960's when I was a biology grad student at UCSD, there were reports that a spectroscopist named, IIRC, Gregorio Weber could see UV after cataract surgery too. At the time there was speculation that what he was seeing was not UV directly, but rather the UV-induced fluorescence of pyridine nucleotides and other fluorescent cellular constituents. The result was the same, of course, he could now perceive UV light with his eyes. I suppose the idea could be tested by looking at the action spectrum or by determining is the spatial resolution for UV was the same as for blue light.
That's a good question in terms of the actual mechanism of UV vision ... and I actually have not done any spatial resolution tests which would require an
eye test on a chart only seeable in the UV spectrum ... seeing the purple'ish ting on a pair of "black" shorts doesn't count!
Jun 22nd, 2012:
No major changes at the 9 month point except
my accommodation seems to be getting worse, not better - darn!
It's not a big difference on the eye chart (which is very sensitive to
the amount of light) but quite noticeable in my day-to-day routine as I
am reaching for reading glasses more often, especially in low light.
At night, I struggle a bit to read the newspaper at about 18" away even
with +1.5 readers ... which should correct to 1/1.5 meters or 26" ... so
I don't seem to be always getting that extra 0.5 diopter of accommodation.
I also notice the limited depth-of-focus when the newspaper is
on the table since the print is at varying distances.
My arms and head seem to be moving things back-n-forth more as the focusing mechanism! ;-)
This may be due to posterior capsule opacification (note comment
on March 18th) which I'm hoping is the case since this is semi-expected
and should be fixable with a YAG laser. I'll do a formal eye appointment at the
one year point and we'll "see" what happens.
Sep 19th, 2012:
Exactly a year after my 2nd cataract surgery, I had an uneventful annual
checkup with Dr. Keller - distance and night vision plus comfort remain good.
We talked about my desire for more accommodation but he measured me at
20-40 and J3 (using both eyes) under very good light. After dialing in
some slight spherical/cylinder correction, he felt I was getting about
1.5 diopters - again under very good light - possible some of that is
depth-of-field. So my residual astigmatism is
working a bit against me and I have to be realistic in my expectations.
He felt the change in the right eye was probably
due to some slight scar tissue that may be preventing movement, but otherwise
the inside of the eye looked good with some very slight PCO. He also saw some floaters in the right eye, although the left is much more noticeable to me.
So no need to do YAG at this point (from a visual point of view) although he
did say that people often see a slight improvement in accommodation from this
procedure as it can allow the Crystalens to flex more posteriorly.
May 14th, 2013:
So mid-afternoon today, I noticed my right eye was seeing a bit unusual ...
and if I looked down and then up, I could briefly "see" a jagged (fortunately not straight - aka a "curtain" due to possible retinal detachment) black line across the top of my vision momentarily. This is seemed to go away after an hour or so ... but now there is a monstrous floater of mild opacity in the right eye.
It sloshes back-n-forth most notably when moving my eye left-right-left. Plus there also is an occasional/intermittent small black floater on the far right - it's like there is a fly that comes in and out of my vision.
There was no difference after rinsing the eye with a few drops of saline - just wanted to make certain this is something internal to the eye rather than on the surface. It is completely localized to the right eye and there is no associated pain/feeling - just a slight obscuration of vision that mists over in normal activity due to the "floater" -
I did not see any "flashes" of light - another
sign of possible retinal detachment.
I was a bit concerned as
my risk for vitreous separation (and retinal detachment) is much higher
after cataract surgery and especially being highly myopic. Fortunately, Dr. Keller
was able to see me the next morning, and after a dilation, he confirmed his
suspicion of a posterior vitreous detachment (PVD) in the right eye.
These are actually quite common, especially as we age ... and fortunately,
I don't have a retinal tear or detachment as these require surgery.
Earlier that day, I had a pretty good (accidental) collision while playing
Ultimate Frisbee, and getting bumped can cause a PVD.
There is no real treatment for PVD - it eventually heals itself and most symptoms (including hopefully the floater) will go away. Dr. Keller said keep an eye out (pun intended) for an increase in floaters (especially black or red ones), flashes
of lights, and the before-mentioned curtain ... as in the short-term, my chance
of a retinal tear/detachment increases. However, over the long-term, he said
it actually does down after PVD.
On another note, Bausch+Lomb received FDA approval for their astigmatism correcting
Crystalens that they call Truelign. This would have been a good choice for me if it had been
available in 2011 since despite the LRI's, I have some residual astigmatism.
June 25th, 2013:
After over a month, I still see the floater which is a bit annoying ... but it
seems to gotten smaller (or I'm getting more used to it) but as mentioned,
these take a while to "dissolve." I have had several instances where I see
some bright flashes out of the "side/corner" of my eye, but these seem
very transient and has only happened a few times ... so I think just
another "normal" visual oddity that one notices if they look closely.
Happened to noticed that the Skeptics Guide to the Universe did a podcast that talked about my UV vision - here's an excerpt just about that.
February 25th, 2014:
So the good news is that annoying floater in the right eye (from the
posterior vitreous detachment back in May) is much less of an issue.
However, the bad news it that the floater in my left eye (that has been there
since pre-surgery) has gotten pretty annoying the last couple of months.
I notice this when reading and/or looking at the computer screen - the print just
Shifting my eyes left/right-up/down helps clear it (almost an
unconscious reaction), but my wife says I look a bit funny doing it.
There also seems to be a reduction in peripheral vision which I presume
is due to reduced visual acuity.
What is most annoying is driving at night, as there is glare/smearing of
bright light sources that makes night driving sometimes a bit taxing.
I.e. the right eye looks fairly sharp with well defined edges on
the bright lights and decent contrast in the shadows ...
but the left eye looks dimmer with smeared highlights and much less contrast
in the shadows.
So ends up being a bit of a challenge for the brain
to combine/decipher these.
Again, I can usually "clear" this by moving the eyes.
There's not much you can do about floaters ... but
maybe I should pop in to the eye doctor to confirm that's all that is going on.
April 25th, 2014:
So about a month ago, I started seeing a "dark dot" in my right eye - this is a "solid" floater rather
than nebulous "stuff" floating around. It is most obvious on (surprise!) white backgrounds and
initially, one thinks it is a moving bug! ;-)
Dr. Keller took a close look at my eyes today and said just some
detached vitreous - nothing abnormal. My visual acuity was about the same,
so that is a good sign ... and I've decided to pick up a some
prescription astigmatism correcting glasses for when I want super-sharp vision.
September 20th, 2014:
The dark dot mentioned earlier disappeared, came back, and then went away again.
While a bit annoying, floaters are common as you get older. There's a "waxy" one that
shows up periodically in my right eye, and a
"globby" one in my left eye which can often be annoying, especially at night.
Moving my eyes left/right-up/down moves it out of the way ... but then it
drifts back into the optical path - darn old age! ;-)
Since my corrected vision has been pretty stable, I treated myself with a
pair of prescription glasses for both distance and +1.0 Intermediate that also correct
for the residual astigmatism and slight over-correction. There's isn't much
correction for distance, but they do make things a bit sharper, especially at night ...
you can also see that I do better on the eye chart. While I can read the computer screen
without glasses, the "+1 readers" really make it sharp ... and easy/faster to read.
The amount of light makes a HUGE difference in how much I can accommodate for closer vision ...
although what is actually happening is depth-of-field is increasing as my pupil contracts
in light. I can read newspapers/books in sunlight ... but in normal indoor light, like to use
at least +1.50 readers to do so.
I continue to get a lot of Emails about my webpage and I'm glad that it
has been a helpful resource to so many people. I'm often asked how I'm doing ... and can
say that after 3 years, I'm happy with the decision and results.
Sure, I wish I had more
accommodation ... plus if there was less residual astigmatism, I'd have that
extra sharpness. But I analyze my vision more than most and one has to be realistic in their expectations.
March 1st, 2015:
The floaters continue to be a bit annoying - more at night and in the left eye ...
which seems to just get "lazy" sometimes and defocus. It's possible
something else is going on - I've thought maybe Posterior Capsule Opacity
but the vision does sharpen up if I move the eyes around, so PCO (sometimes mistakenly called a "secondary cataract") seems unlikely as that would probably stay in the optical path and always obscure vision.
Speaking of floaters, the general medical consensus is there isn't much
you can do about. Some people are able to "tune 'em out" ... but being an
analytical engineer, that unfortunately hasn't worked for me! One possible solution is a
Vitrectomy which removes the vitreous humor (and hopefully the floaters) but
as with any surgery, it has some risk ... and this is only indicated for
Another approach is using a laser to "zap" the floaters, but very few
doctors do this - here's a good survey piece by a retired ophthalmic consultant. I've actually had folks Email me about there positive
experiences having this done ... so it does appear to work in some cases.
Regardless, I have a checkup with Dr. Keller at the end of April, so I'm
curious to hear what he sees/recommends after examining my eyeballs.
Oh yeah, and speaking of medical stuff, earlier today I fractured my Fibula snow skiing at Copper Mountain - darn! :-(
May 6th, 2015:
So I had an appointment with Dr. Keller a week ago - pretty uneventful.
I've updated the refraction numbers - slight visual degradation in both eyes,
but perhaps I was having a bad day. He noted the floaters (which I feel have
gotten worse) but not much I can do about 'em. I also feel there is a bit more
"shimmering" in both eyes, but this is mostly noticeable in specific situations
such as a streetlight at a high angle at night.
I got an interesting Email today from another eye doctor who wrote:
"As an eye surgeon who has had a lot of experience using the lens, I found your experience to be pretty normal. Since the average lens power is closer to 20 diopters, the accommodative effect is significantly greater than a weaker lens like 10-11 diopter. [which mine were] Imagine if you were so nearsighted that a zero lens was needed. How much of an accommodative result could you expect with this? None!"
That does seem logical, although there may be more to the accomodative effect as
suggested by this paper - I could not find much medical literature in this area.
Feb 27th, 2016:
I continue to get several Emails/month from people who also are able to see Ultraviolet
and have stumbled across my website; almost all say
"thank you for explaining what I didn't understand."
HankR is a pretty technical dude who understands and has lived with a single
IOL since 1994 - "Comparing 405nm for example is stunning -- faint violet with natural eye, brilliant purple with white center spot with operated eye (and yes it's scary)."
He graciously sent me some "visible-light filters" (for UV flashlights) to test
and I've updated my Natural Gas test
which indicate they are superior to Wood's Glass in filtering visible light, but allowing UV through.
July 8th, 2016:
I continue to get a variety of Emails from people thanking me for this website
and sharing their experiences. RobinB wrote me first 3 years ago when he had his
left eye done and sent an encouraging update recently.
He had some PCO and underwent YAG laser treatment to clear it up and writes:
Within a day or so I could really notice the difference and suddenly knew why they call the
Crystalens and HD lens. The TV and any backlit screen was fantastic!
Super sharp and clear. Unfortunately, I did have a complication in the form of a vitreous floater.
This floater looks like a large foggy blotch that lives in the upper right quadrant of my left eye and is not visible until you look far left and then back to center, or far down and back to center. Then it sweeps down in the opposite direction of eye movement like a blurry windshield wiper. Yuck!
How discouraging, especially when that left eye can suddenly focus and read
- it is 20/20 distance, 20/30 near(reading) and I’m guessing 20/10 or 20/15 for computer distance of 2 feet up to perhaps 4 feet (intermediate) as they didn’t test this distance.
I couldn’t be more happy with the sharpness of my 3 year old left eye Crystalens now and will not hesitate to do the same for the right eye (which he had done a month ago) if at the one year mark the sharpness is not approximately equal to the left. I would even consider it if there isn’t any noticeable cloudiness to the capsule as I think these lenses may be best when unimpeded by the capsule? This is even with the complication of the Vitreous floater that cropped up after the YAG.
I asked about YAG several years ago, but didn't have enough PCO to warrant it ... plus as Robin
noted, there are possible side-effects as he noted. But I'll probably see Dr. Keller later this
year and will definitely ask again about YAG for me as some extra sharpness is always good,
plus I'd love to get some more accommodation.
People often ask how much does Cataract Surgery cost?
My insurance is with Cigna and since Cataract Surgery is a medical
condition, they help pay for the operation and a "standard" IOL ... but with a
$250 co-pay plus 20%, my out-of-pocket expenses added up to
$2,894.90 ... plus $3,700
for the Crystalens upgrade
(billed as a markup for the product and the surgeon) for both eyes.
So while not cheap, it was less than the $6,000,000 that Steve Austin's bionic eye cost! ;-)
|Eye Surgeon Pre-Op
|Eye Surgeon #1
|Eye Surgeon #2
|Crystalens Premium x2
|Eye Surgeon Premium x2
|Pre/Post-op Eye Drops
While "20-whatever" doesn't tell the whole picture about the overall visual
acuity of your eyes, it's what most people are familiar with.
I tracked my progress with the Crystalens implants using the
FAA Eye charts - the eye doctor actually measured slightly better numbers.
||OD - Right Eye
||OS - Left Eye
||Best Corrected Visual Acuity/Comments
||Pre-op numbers are BCVA - needed +2 for reading
Numbers are Far-20'/Intermediate-32"/Near-16"/Jaeger Scale.
A "+" means I got a few letters on the line below and "-" means I missed a few letters on that line.
Tests done consistently with very good indoor light ... so increased
Intermediate/Near vision gets noticeably worse with less light - a bit disappointing not more accommodation.
Some summary points - remember I'm not a medical professional so consult with your eye doctor about your specific situation.
I've worn glasses/contacts since childhood, so my Cataract surgery has been especially life-changing for me.
- While Cataract Surgery is fairly routine these days, there is risk with any surgery - I'm very happy to have had no major complications.
This may actually be a "better" option than Lasik, especially if you are middle-aged and want to try to correct Presbyopia.
- Educate yourself on the pro/cons of the various solutions and what you want - I don't believe there is a "best" IOL ... yet.
Along those lines, I really appreciated Dr. Keller's candid comment - "results are limited by limitations in current technology"
- You can over-research Cataract Surgery (as I did!), but ultimately you have to trust the eye surgeon who does it.
This sounds good in theory but is realistically difficult as every doctor claims the lowest complication rate, best results, etc.
- Be realistic in your visual expectations for far/inter/near and low-light
Especially true if you have any amount of astigmatism - make sure you understand what your surgeon can/can't do about that.
- Cataracts "sneak" up on you as the vision slowly degrades, so keep an "eye on your eyes"
The dullness/dimness is subtle (plus your natural lens yellows) and everything looks so much more vivid and bright after surgery.
- After seeing my wife go through Breast Cancer Surgery a year earlier, Cataract surgery was a piece of cake in comparison.
I was able to "function" that afternoon and drive the next day - there's little pain/discomfort associated with the process.
- Ask the Eye Surgeon/Anesthesiologist if you can stay awake/aware during the operation - it was pretty cool ... for me! ;-)
- If you have significant correction, minimize the time between operations - it's tough have one "good" and one "bad" eye.
Putting a "pirate patch" over the translucent patch really reduces the strain on your brain by producing a dark image.
- It's amazing to see 20-20 the very next day, but be patient as there are some visual aberrations that last longer.
- Also have patience (on a longer scale) for the Crystalens accommodation - I'm still waiting/hoping for more, especially in low light.
I don't expect to be able to read without glasses, but one diopter of accommodation would be nice for intermediate viewing at a meter.
- Activities that require motion such as sports, driving, etc. are much
easier with sharp vision.
- While you won't "see Dead People" (Sixth Sense), you might see Ultraviolet light which is kinda interesting.
- Consider having Cataract Surgery done sooner rather than later - as one MD found out.
I consider myself fortunate to have a fairly successful outcome and "see" the world in a whole new light! ;-)
I've gotten a variety of Emails about this webpage, but this one from
AndyG in nearby Fort Collins, Colorado was right up my alley! ;-)
Holy cow Alek, there is so much good information in your cataract description.As an engineering manager with a long history in color science, optics, and image processing, I totally geeked out at your descriptions. I've wondered how multifocal lenses work. Now I know. I wondered what the state of IOL's with accomodation were. Now I know. I knew you see more deep blue after cataract surgery, but wondered what that's like. Now I know. I'm 55 and still have 20/20, but when I ask my eye doctors about any of this stuff, they can't explain it nearly as well as you do.
I was chuckling the whole way through your cataract diary thinking "I'm blown away by the amount of research Alek did. I'm blown away by all the self-experiments. And I'm blown away that you wrote the whole thing up in so much detail. You're an excellent writer, too."
Thanks for sharing !!!!