I have been wearing glasses and contacts to scuba dive. I struggle with those contacts getting them in (sometimes taking me 30 mins!), taking them out, keeping them clean, etc...but my Rx can't match my glasses due to astigmatisms in each eye. They were better than nothing, but vision was not as clear as my glasses. This mask is so much better than my contacts! I can drive to the site with glasses and easily put on my mask and dive! No more anxiety over putting in contacts! I photograph the marine life and struggled seeing the subject in my camera screen with contacts--not with the mask. My comfort level diving now is so much more relaxed. I now do not stress over prepping for my dives or questioning if i got something in frame. I never wanted to do a liveaboard because of the hassle with contacts. And the cost of the mask over contacts saves me so much money!