|
There are two different measures of visual acuity: uncorrected (without glasses) and "best-corrected" (your score when wearing the best prescription for you). These are called UCVA and BCVA respectively.
What laser eye surgery aims to do is to change your uncorrected visual acuity (UCVA) from whatever it is to as near to 20/20 as they can get, or even better. In other words, they want to make your acuity without glasses as good as they can.
What is important to bear in mind is that acuity is only one measure of vision. It is entirely possible (and in laser eye surgery regularly occurs) that you can have excellent (20/20 or better) uncorrected visual acuity but not be happy with your vision because of vision quality problems that surgery has caused, such as poor night vision or double vision. Thus, it's very important to understand the kinds of changes laser eye surgery causes to the corneas, and what kind of tradeoffs may be involved, before undergoing laser eye surgery. |
