You can go to a local dive shop and get prescriptions made for your diving mask. If you wear glasses, you can still snorkel. If your one of us that needs to wear glasses and want to go snorkeling or diving, try this. Take your old glasses (if you can still see through them), remove the earpieces, keep the screws with the ear pieces, in case you need to replace them. Put a safety pin through the hinge and get a large flat rubber band that will reach around your head and hold your glasses in place. Then you can wear your glasses inside your mask and the flat rubber band will allow the mask to seal out the water.