OptiVISOR LX By Donegan Optical. The OptiVISOR LX Binocular Headband with Optical Grade Lensplate #4, Magnifies 2x Power at 10 inches. Perfect for anyone whose profession or craft requires close accurate work with both hands free! The adjustable side pivots allow the visor to tilt at your fingertips and a dial adjustment headband that conforms to comfortably fit all head sizes. The LX has a genuine leather padded comfort band with orthopedic felt for extra comfort. Please note: Not a safety device; do not use in place of safety glasses or face shield.