Originally posted by DennisW
From your post, your are very, very near sighted 20 / 600 is nearly blind, may even be legally blind. I am no where near that near sighted, but I have found that the corrective lenses that fit right into the mask are the best way for me. The only problem with that is reading my guages and computer. For that, I use those stick on bifocal lenses you can buy at most dive shops. I only use one of them because they are so far apart you can't get binocular vision looking through them anyway.
I have a friend that dove with contacts for years with no problems. Then she had lasik sugery and now doesn't need anything.