When you go for your 1st Class Medical and you take the vision test, either you will be fine or your AME will put something like... “corrective lenses must be worn” or something like that. I will say that it wouldn’t hurt to go to an Optometrist or Opthamologist before you see your AME, and find out exactly what lenses you need ahead of time so you show up prepared for the AME and then you can take the test with you lenses on.....