homerdoc
Contributor
I am with elmo, I have worn contacts on each of my dives and swim with them all the time and have never lost them.
Welcome to ScubaBoard, the world's largest scuba diving community. Registration is not required to read the forums, but we encourage you to join. Joining has its benefits and enables you to participate in the discussions.
Benefits of registering include
Checkout SeaVisionUSA for your prescription mask needs. Read what TBone and Birddog said above about certification. They (and others) make good points
I am with elmo, I have worn contacts on each of my dives and swim with them all the time and have never lost them.
My daughter has worn contacts for several classes and maybe 500 dives, never lost one, never had any sort of problem. The daughter's experience has forced me to admit that clearly contact lenses work just fine. She can also buy or borrow a replacement mask very easily. Of course she can't swim and see without her mask, which some will say is a skill she might need someday. On the other hand, those of us with corrective lenses in our masks can remove the mask and open our eyes, but we might not see much better than someone with their eyes shut. And the whole scenario is pretty unlikely to ever be important.
If you decide to get a mask with corrective lenses, you don't have to get a real prescription mask from an optician, you can buy corrective lens in standard grades at 0.5 intervals of correction (+0.5, +1.0, +1.5, or -2.5,-3.0, etc).
For example:
Corrective Mask Lenses
https://www.scubapro.com/en-US/USA/accessories/mask-accessories/products/optical-lenses.aspx