OptiVISOR lenses are ground and polished to precision ophthalmic standards The OptiVISOR frame is made of lightweight, durable impact resistant materials The comfortable continuous headband is fully adjustable to fit any size quickly and easily. Adjustable pivot knobs hold the visor in any position for easy flip-up viewing Interchangeable lens plates are available for various applications & a new strap on headlight and Optiloupe. Used for: Jewellers tool & die makers & engravers Hobbies: fly-tying, stamp & coin collectors Needlepoint, cross-stitching or sewing Draftsmen, artists and architects To read small print Physicians or dentists ...and many more