Apply a Press-On sphere to the back surface of one or both lenses of the eyeglasses with just water.
3M™ Press-On™ D-Seg Aspheric Optics: We are now able to custom cut any of the Plus Aspheric lenses to D-Segs
Range: +0.50 to +16.00
Material: Polyvinyl Chloride
Thickness: 1 mm
Dimensions: 25.4 mm x 16 mm
Units/Package: 2 pre-cut lenses per package
All Press-On™ photos used with permission from 3M
* 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.
For 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
These may not be returned as they are cut for each order. – Sorry