I wear glasses (not contacts). Swimming underwater without glasses, using average swim goggles gave the world a uniform pathetic watery blur. A few years ago it finally dawned on me that I could get corrective goggles. I was surprised to discover that goggles with prescription corrective lenses were not much more expensive than plain ones -- less than $10. These "optical" goggles are magic. For only a few dollars more my underwater vision is crystal clear. Anit-fog, fair fit, and prescription built in. So many brands make them (and of course many models are more expensive) that I wonder if I am the last person in the world to learn about them. In any case I only have experience with the ClubSwim models. They are available in a limited choice of diopters in half point increments from -2.0 to -7.5.