Scuba Blue Dive Mask FARSIGHTED Prescription RX 1/3 Optical Lenses Available corrective lenses: +1.0, +1.5, +2.0, +2.5, +3.0, +3.5, +4.0 Tempered glass lenses. We do not accpet return for customized prescription mask (different prescription for each eye) Unique buckle design which allows you to adjust the mask easily. IF YOU NEED DIFFERENT CORRECTIVE LENSES ON EACH SIDE RIGHT/OD, LEFT/OS . PLEASE SELECT "DIFFERENT PRESCRIPTION FOR EACH EYE" OPTION AND SEND US A MESSAGE WITH YOUR PRESCRIPTION AFTER PLACING ORDER. IF YOU SELECT ONLY ONE PRESCRIPTION OPTION (EX.-2.0), IT MEANS YOU ARE ORDERING SAME PRESCRIPTION FOR BOTH EYES.