Donegan Optical Lens Plate No. 4 for OptiSIGHT Visor provides 2x magnification at a 10-inch focal length. This interchangeable and/or replacement lens plate is for the Donegan OptiSIGHT Magnifying Visor only and does not fit OptiVISOR models.
OptiSIGHT Magnifying Visor sold separately (MaxiAids Item Number OPT-OSV). Made in the USA.