I got iLasiked recently.
I've thought about it on a number of occasions but haven't pulled the trigger until now.
One only has one pair of eyes per lifetime, and online accounts of unsatisfactory outcomes and medical complications on
http://www.lasermyeye.org/forums/ and
http://www.lasikcomplications.com/ are enough to give anyone cold feet.
On the other hand, as someone who has been quite myopic (with significant astigmatism) since childhood, the idea of waking up and being able to see a clock without first fumbling blindly for glasses is quite an attractive and novel concept.
Moreover, it'd be nice to ditch at a stroke all the special eyewear for sports that I've accumulated over the years, e.g. prescription googles for swimming, and a prescription facemask for snorkeling and scuba diving. Contact lenses for running and table tennis to avoid sweat causing glasses to slip or become streaked and unclear. Two pairs of ski googles: one to fit over glasses, another for use with contacts. Why not ditch the glasses and just use contacts? I have soft toric lenses but for use on computers or reading, my eyes get easily tired. So I use glasses for those tasks. Also, I can't safely wear contacts during cycling even with eye protection: 50+ mph descents can tear at and dry out one's eyes, putting the lenses at risk of falling out. Moreover, for ultra-distance events, a 24 to 60 hour bike ride with contacts can be quite a trial.
I had an initial 2 hour consultation at an English-speaking clinic in Tokyo where they determined without sales pressure that I was an excellent candidate. Several days later, I returned and paid 360 000 yen ($4000 US) to undergo iLasik surgery, which is supposed to be state-of-the-art.
The operating room:
(
iLasik stands for the two stage IntraLase (laser eye flap cutting: the machine on the right) and Visix (customized map laser correction: machine on the left). iLasik, IntraLase and Visix are all registered trademarks of AMO (Abbott Medical Optics) Inc., the current industry leader in Lasik treatment.)
You can read about the procedure on many places online. But for the record, here are a few pictures from my surgery:
Don't worry, you can't blink during surgery. And with anesthesia, you can't feel a thing but I swear you can smell the burning as the laser zaps your eye...
Pressure ring is placed on the eyeball for IntraLase.
Can you see the semicircular cut the first laser made?
Visix zones projected on my eyeball.
Post-surgery, I was supplied with various eye drops for use five times a day for the initial one week period:
- Dexamethasone: an anti-inflammatory
- Antibiotic drops
- Hyalein and Hyalonsan to cure corneal laser cut and dry-eye symptoms
- Oxybuprocaine: anesthetic drops for pain
I ended up taking items (1) through (3) only. And after the initial 24 hour check-up, I was told I could discontinue (1).
After one week, I was cleared for sports again. You cannot spot any laser cut. And I'm down to using just Hyalonsan lubricating drops.
There are risks with iLasik of course. You can pick the best/most experienced doctor you can find (mine had done over 30,000 operations), make sure you're an excellent candidate and follow all instructions carefully.
For example, pupil size and corneal thickness are important parameters. People with large pupils are likely to experience significant night vision problems such as halos and starbursts. My pupil size is 4.88mm normal and 6.2mm dilated, so that helps to minimize those effects. Secondly, my corneal thickness is an above average 575 microns. After correction for my 5.75 diopter prescription, I still have around 450 microns left.
I'm told it will take perhaps 3 months for my final correction to take. Since it has only been just over one week, all I can point to are my impressions and the visual acuity testing results.
Impressions: Immediately afterwards, cloudy vision. Halos and starbursts are pronounced at night.
One day later: there is a slight but noticeable haze during the day but otherwise distance vision is serviceable. Night vision is better but not as good as with glasses or contacts.
One week later: haze is gone. Halos can be noticed but don't impede night vision. Same goes for starbursts. I am not entirely starburst-free with contacts or glasses in the first place either. Driving or riding at night is fine.
I hope these effects continue to diminish in the coming months.
Visual acuity: 1.0 in the Japanese system is equivalent to 20/20 American. (A figure higher than 1.0 corresponds to a rating better than 20/20.)
| | Before Lasik | Next day | One week |
| Right eye |
0.03 (Japanese) | 1.2
| 1.2 |
|
20/660 (American) | 20/17 | 20/17 |
| Left eye | 0.02 (Japanese) | 1.0 | 1.5 |
|
20/1000 (American) |
20/20 |
20/13 |
I'm told the vision might continue to improve and stabilize over the first 3 months. (I will update this table after the next check.)
Unfortunately because of my age, I still need reading glasses for computer use and for close-up reading. Next step? Investigate by means of a contact lens whether a separate CK operation is appropriate to fix my presbyopia or would it compromise my newly corrected vision too much...
Four month report:
- Haven't used the eye drops for a while now. No more dry eye even after waking up.
- Halos and starbursts are not noticeable at night at all.
- Vision is pretty good but not perfect. In low contrast situations I sometimes notice there is a faint ghost 2nd image, especially with text.
- After 3 months, I bought some (low strength Bausch & Lomb) presbyopia-only contact lenses to try. It's based on the principle that the center of the eye is used for near vision and the periphery for distance vision. Yes, it improves my near vision (for reading) but there is a small cost in distance vision acuity.
It's a tradeoff. At the moment, it seems like reading glasses are less of a hassle and can be higher strength for better magnification/easier reading.
Also good. I bought a new pair of shoes after briefly trying them at the marathon expo on Friday. Newtons. They're quite different from ordinary running shoes. (And priced quite differently too.)
Decided against conventional wisdom to chance them on Sunday for the event. The soles of my feet haven't had the chance to get used to them but they're a dream shoe if you have decent running mechanics.
The final good thing was that I finished. Just under the psychologically important 4 hour mark. You can all stop reading here.
What follows below is a core dump for when this event becomes part of the "misty yesteryears" (song reference).
Time
3:57 bracket. This was my slowest Tucson marathon out of the three I've done.
(In fact, I had a minor heart attack when I looked at my iPod and it said 4:15... turns out I'd left it running after crossing the finish line. Have always been looking to improving not sliding backwards. That would have been a major bummer. Glue factory thoughts. I've never done a marathon over the 3:59 mark, and I really don't want to start now.)
A tale of two Tucson marathons
(2008) Last year, I had nearly enough endurance but I noticed didn't have speed. Although I was unhappy that I faded late in the marathon, still I managed to post an almost respectable 3:41 time. (See report here.)
(2009) This year, I had no opportunity to do long runs. Instead, I hoped 30 min sessions with speedwork on a treadmill would address my lack of speed last year, boost my aerobic capacity and substitute for endurance. Outdoors, I ran 10Ks once a week to save time. The result? I ran with good form for about 18 miles and then suddenly crashed to a limp and robotic shuffle as my leg muscles locked up on me. Last 7 miles was excruciatingly long and pathetic. 3:57.
A Stupid Exercise
Afterwards, I realized this was a stupid exercise. I was also 3 kg overweight (good food in Doha). There is nothing heroic about completing a marathon when one's muscles have quit. It's extremely dispiriting to have to walk unnaturally mile after mile. And the damage to the undertrained and overworked muscles is counterproductive to recovery and fitness anyway.There is no point in entering.
Completing it in just under 4 hours: there is simply no value to this experiment. I've done the "just under 4" before. What possibly more could I learn? I really wish I hadn't run it this year.
Lessons for the Future
Memo to self:
I believe there are two necessary and sufficient components to a successful marathon. One is sheer aerobic capacity from speedwork. The second is muscle endurance from long runs. Having just one out of two will only get you so far. But not having the 2nd will result in a total collapse like this time.
Speedwork can compensate for lack of endurance to some degree. In fact, I believe simple speedwork can substitute for half-marathon fitness. But there is something special about the marathon distance: 42.125 km or 26.2 miles of pounding overwhelms ordinary, everyday fitness. It imposes an endurance demand on the human physiological system that requires specific training.
Another way to look at it is total workload. A marathon is about 3000 kcal for someone of my weight. A 10K is about 800 kcal's worth. There is no way you're gonna scale up from 800 to 3000 kcal on race day.
Memo to self: Put another way, if you haven't put in the miles, don't bother to show up. Seriously.If you're gonna show up, respect the distance.
With that in mind, let's roll on and look forward to a decent showing in the Tokyo Marathon (2010)...
[Update: A week later, my left calf muscle is still hurting and my right knee (outside) twinges now and then. Simple overuse injuries. Definitely overdid it.]
