I suspect it is dim light where the pupil size grows near or larger than the corrected area. You will get corrected light entering the center of the eye, and halos from the uncorrected light entering the uncorrected lens of the eye around the edges of the surgery. They're supposed to measure your eye, your pupil and tell you about this stuff before the surgery.

Now me - I had the surgery in one eye, it wasn't great and I never did the other eye.

Except for completely uncorrected vision, the non-surgery eye was significantly better in all aspects than the surgery eye. (both with correction)

Nobody asks the lifetime of the surgery, but I can tell you after a few years the surgery eye was back to where it started. It will need cataracts earlier. It has halos at night. It has continued to need correction, and now needs more correction than the other eye. So now the non-surgery eye is the best in all respects.

With correction (astigmatism contacts), the non-surgery eye has more immediate focusing, less glare, and better corrected vision than the surgery eye.

oh wait, I couldn't get correction of the surgery eye when it started needing it, since contacts were too thin.

In my specific case, I couldn't wear glasses because the low correction of the surgery eye could not work with the high correction in the non-surgery eye. (two different image sizes, brain couldn't put them together)

If I had known, I would have asked two questions:

- will I get the best corrected vision from the surgery or from no surgery + contact lenses.

(the doctors typically try to compare no correction pre surgery to no correction post surgery, which is ridiculous)

- what will happen to my eyes in 5 years, 10 years, etc