Donegan Optical 1868 - Optivisor ALS1 - Complete Set - w/#7,5,4,3 Lens Plates

Optivisor AL - Complete Set - w/#7,5,4,3 Lens Plates OptiVISOR is a precision binocular headband magnifier which permits unrestricted user efficiency while reducing eye strain?leaves both hands free and allows three dimensional vision. Used by anyone whose profession or craft requires close accurate work. Can be worn over prescription or safety eyeglasses. Binocular magnifier with acrylic lens plate. Includes OptiVISOR with #7, #5, #4 and #3 lens plates.