Both are right: The fda guidelines say 18 if you are just nearsighted and 21 if you have astigmatism. More importantly, you should wait until your eyeglass prescription is no longer changing.
Answered 7/13/2013
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Age 23: Age 23 is the usual breakpoint as this is the approximate time that major changes in eye power have ceased to occur. If you have it down while younger, you may acquire more eyeglass needs. Lasik is very successful on the proper eyes. Check with your ophthalmologist to see if you can be a candidate.
Answered 7/14/2013
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