The ever-popular OptiVISOR® is the first choice of many professionals and hobbyists. Interchangeable, lightweight glass lens plates are ground and polished to prismatic optical standards to provide clearer, sharper optics. Self-locking dial adjustment provides a good fit on any size head and over eyeglasses. Genuine leather comfort band makes OptiVISOR more comfortable than other magnifying visors. Adjustable tension pivot assembly keeps visor in desired position.