U.S. Divers makes a mask that takes drop in perscription lens that are pre made to certain vision strengths. Just get a lens strength close to your perscription and go. In California the mask is about $40, the lens are extra and I don’t recall what they cost but it wasn’t bad. Been using mine for 6 years or so now, don’t even think I changed it when I got new glasses and I haven’t noticed a difference under water.