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Can one ever see sharper later on than they did as a child?

I'm considering refractive surgery and it is marketed as "patients see better than ever before, even with the best of glasses".

I'm no expert on the matter but AFAIK the brain learns to see during early childhood (if that is disrupted the one becomes amblyopic) and I thought no matter how good an image the eyes provide later on, the brain just won't be able to process it.

Think of it like so: E.g. one has 1D of astigmatism from birth that is never corrected and he sees 20/20 or 20/25. So if he gets a pair of glasses at age 30 will the image be ever better and hit e.g. 25/20?
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177275 tn?1511755244
The claims of refractive surgeons especially the commercial ones like Lasik Plus are really just marketing claims and rarely does an eye see better after refractive surgery than it did before surgery with glasses or contact lens.   If an adult eye say older than 16 have amblyopia and the eye has never seen better than 20/40 with glasses or contact it will only see 20/40 after refractive surgery at best.  There are some exceptions.  Early child refractive surgery can help and eye see better than with glasses. The first childhood refractive surgery unit in the United States and one of the few in the world is set up at Children's Mercy Hospital here in Kansas City, MO,  USA under the direction of Erin Stahl, MD.
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Thank you for the answer. Well the amblyopia as an example was sloppy from me; let's consider the other example: mild refractive error, e.g. the 1D astigmatism, but still 100% or almost 100% vision so no amblyopia and the brain did learn how to see.
Can the brain process a better input given it learned to see in childhood?
not usually there are some cases where a person has gone blind in the good eye, and had to use the amlyopic eye for everything and after 6-12 months some improvement is seen over what it was before it was paired with a normal eye.  Rarely does it improve to normal or near normal if the amblyopia is moderate or severe.
And on healthy already seeing eyes? from 100% with glasses to e.g. 130% with no glasses? Same goes?
You can't get larger than 100% in human function.   20/20 Or metric 6/6 is an average.  Visual acuity like speed of running, strength, hearing etc. is distributed along a Bell shaped curve.  Some eyes can only see 20/30 with or with out glasses and with no diseases like slow runners and weak muscles.  Other eyes can see 20/10.  The theoretical limit of visual acuity based on the distance of cones in the macula is about 20/8.
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177275 tn?1511755244
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