OptiVISOR 1.75x at 14&rdquo; With Quasar Led Lighting System Lens provides 1.75x magnification at a focal length of 14. Optical Glass Prismatic Lenses are ground and polished to precision optical standards Bevel-edged lenses mounted in an interchangeable plastic frame Adjustable pivots allow the visor to be tilted out of the way when not needed