Lenses, that clip onto your eyeglasses and allow you to flip the lens up or down to add to your standard prescription strength.
These lenses come in the following strengths: +0.25, +0.50, +0.75, +1.00, +1.25 diopters. Optical math suggests that the best strength for pistol shooting is around +0.75 if you are not using an aperture, and is best suited for indoor, in lower light situations. With an aperture, like Eye Pal, or a Merit Disk, +1.00 is recommended, though this setup needs more light.
The clip on flip up lenses are 1-1/8″ diameter. We can make flip up lenses that are 1-1/2″ wide upon request.