Scuba Black Dive Mask NEARSIGHTED Prescription RX Optical Lenses TEMPERED GLASSES. Available corrective lenses: -1.0, -1.5, -2.0, -2.5, -3.0, -3.5, -4.0, -4.5, -5.0, -5.5, -6.0, -6.5,-7.0,-7.5, -8.0,-9.0, -10.0 Crystal silicone facial skirt and mask strap. 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.