Donegan Optivisor optical glass lens plates are available separately and can be switched in moments. Simply press out the black keepers with a coin or something similar, switch lens and press the keepers back in. Earlier models had small nuts and bolts.Donegan is the only head mounted magnifier that is available with optical glass prismatic lenses. These lenses cost more but deliver the best clarity and longevity compared to the cheaper lens material used by other manufacturers.
OptiVISOR Head Band Magnifier Visor – ZOIC PalaeoTech Limited
Optivisor, Replacement Lens Plate, 1.5x at 20 - Jorgensen Laboratories
Donegan LP-7 OptiVISOR Lens Plate
Optivisor Optical Glass Binocular Magnifier 1.5x-3.5x All Magnifications - Findings Outlet
Optivisor Del Sol
Optivisor Optical Glass Binocular Magnifier 1.5x-3.5x All Magnifications - Findings Outlet
Optivisor DA2 - 1.5X — PERRIN
OptiVISOR Head Band Magnifier Visor – ZOIC PalaeoTech Limited
1.75x Optivisor Lens Plate
Head-mounted Welding Repair Magnifier for Head Band Optivisor Eye Loupe 4 Lens
Donegan Optical OptiVISOR Magnifying Headband Visor with 1-3/4X at 14 Lens Plate