I considered this a few years ago and asked my AME (one of the more prominent aeromedical examiners in the U.S.) about it and he said "Dont even think about it!"
An alternative you may wish to consider is contact lenses. I began wearing these more than 40 years ago when I began flying. I am able to obtain a far better correction than with eyeglasses, and even now at age 64, by using multifocal contacts, I have excellent near and distant vision and do not need supplemental reading glasses. I have never had an anxious moment due to contact lenses while flying, however, I do keep eyeglasses close at hand just in case; in 40+ years, the only need I have had for them is an occasional late night jaunt to the loo. Not everyone can tolerate wearing contacts, but for those who can, an excellent solution.