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I am having problems with glare, halos, starbursts. Day and night. So they said I had 8mm pupils and that there treatment zone would max out at 8mm
They are using visex S4. I looked this up it seems treatment zones could be highe for the device. I'm trying figure out my options at this point. Should I continue to wait? My eyes don't react to light like they should my doctor said they don't get very smaller and I need to let my eyes adapt. Is he blowing smoke or what? I'm very concerned that the treatment zone wasn't increased if that was the capability
Pre op
R-3.00 diaopters
L-2.75 diopters
Post 1 month im seeing 20/20 with glare, halos, starbursts
Hello fauzool, and sorry to hear about your situation. I had LASIK in one eye and PRK in the other four years ago. One month isn't a long time... I had massive and horrifying glare/halos/starbursts post-op, which improved significantly over three weeks, and slightly over four years, but not completely. Everyone is different.

I found several studies which say that, as long as the optical zone is ~6.0 mm or more, larger pupils did not have more night vision problems [u]after[/u] 3 to 6 months post-op. (Note that optical zone is smaller than treatment zone, which includes the transition or 'blend' zone.)

Which makes one wonder what [i]does[/i] cause night vision problems. A decentered ablation (not properly lined up) could do it. Dry eye, maybe.

I also found one small study to suggest that PRK tends to increase pupil size but that it improves with time. The average increase was 0.7 mm at 3 months and 0.2 mm at 21 months. For what it's worth, my PRK eye has a slightly larger pupil than my LASIK eye, but I don't have my records in front of me so can't say what it was before surgery.
Yes - according to the FDA approval letters, the Visx Star S4 and Star S4 IR have an 8 mm treatment zone and 6 mm optical zone when used for nearsightedness, such as in your case. I don't know if they could be pushed beyond those sizes. For what it's worth, my own surgery used the Star S4 IR.

It seems deceptive for doctors to claim an 8 mm treatment zone when only 6 mm of that is optical zone. But again, supposedly, after 3 to 6 months, larger pupil sizes are not associated with more night vision problems as long as the optical zone is at least 6 mm.

One doctor claimed that the Star S4 doesn't always achieve 6 mm, but then, he works for a competing manufacturer (WaveLight).

For a long time, I got some starburst during the day with bright reflections, e.g. sunlight reflecting off metal. It pretty much went away eventually.

I'll PM you about the pupil size study.
[QUOTE=angsty;5371061]

It seems deceptive for doctors to claim an 8 mm treatment zone when only 6 mm of that is optical zone. But again, supposedly, after 3 to 6 months, larger pupil sizes are not associated with more night vision problems as long as the optical zone is at least 6 mm
[/QUOTE]
Ya they said your pupils are exactly the size we can treat you won't have problems.... Anyway thanks for that pupil study also In reference to pupil sizes not associated with night problems is that the same link you sent me?
Thank you!





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