mulligan
Cleared for Takeoff
If you have a current medical with no vision correction required and you go to the eye doctor to get glasses to correct to 20/20 vision, do you need to report that or can you just wait until your next medical?
You don't have to report it, but you need to wear your classes if you can't see to the standards of your medical without them (20/40 is all that class III requires by the way).
Your next medical exam will include the standard vision test. If you pass it without glasses there will be no corrective lens requirement. If you need glasses to pass it you will have a note like "near vision correction must be available" for piloting. I've worn glasses for years and have had the correction requirement come and go with different exams.
Anyhow, I've always worn glasses when I flew, even when I didn't have the restriction.