Originally Posted by Excargodog

Standard for Class 3 is that you are 20/40 or better in each eye with or without correction while Class 1 requires you to be 20/20 in each eye with or without correction. That's basically the only difference.

If you need glasses, get glasses. Nobody cares.

If you can't meet the standard in both eyes (or are missing one eye) it gets a little more involved, but it's still doable.