SHARP SIGHT OPTIC AID Similar to the old Hawk-Eye from Lyman with some improvements. Improves the eyes ability to focus on something close up and far away at the same time such as sights & a target. Works on all types of glasses including bifocals & progressives attaches with a soft silicon suction cup that won’t scratch lenses and is easily removed. The aperture can pivot out of the line of sight when not needed. Extremely light weight at under 1/4 oz, it won’t weigh down your glasses. A great optic aid at a real bargain price!  No. 50700