Press-On™ D-Seg Bifocal Lenses

DescriptionFor use in water, use the following formula to find the right diopter lens for you: (1/2)(Cylinder) Sphere = Diopter.  (found on your most recent Rx) Water will refract light and correct vision a bit without any prescriptive power applied. With that in mind, always select a diopter strength that is one step lower than the outcome of your calculation No returns as they are cut for each order. – SorryInternational Orders may be accessed Duty / Taxes at the time of delivery – these are not pre-paid3M Press On BookletMade in the USA * Used for refractive /- correction – these are not prisms.May be used to adapt sunglasses to bifocals or swim goggles or dive masks for Rx correction.Apply a Press-On sphere to the back surface of one or both lenses of the eyeglasses with just water and the capillary action between two wet surfaces.3M™ Press-On™ D-Seg Aspheric Optics: Range:   0.5 to 16.00 Material:  Polyvinyl Chloride Thickness: 1 mm Dimensions:  25.4 mm x 16 mm Pre-die cut D-shape Units/Package:  2 pre-cut lenses per package  All Press-On™ photos used with permission from 3M