The OptiLOUPE is an attachable crown glass lens that adds the additional power of an Eye Loupe to the OptiVisor. (Optivisor sold separately.) Designed for Monocular use the OptiLOUPE easily flips up or down providing additional 2.5X magnification. Easily attaches to either eye of any OptiVisor.
Some people will install two Optiloupes, one on the left side and one on the right side of the Optivisor. It is an easy way of changing magnification or focal distance without having to remove the Optivisor lens plate. This technique is particularly effective if you have installed the Quasar Lighting System.