OptiVISOR - Donegan Optical Company, Inc.

OptiVISOR is a precision binocular headband magnifier which permits unrestricted user efficiency while reducing eye strain—leaves both hands free and allows three dimensional vision. Used by anyone whose profession or craft requires close accurate work. Can be worn over prescription or safety eyeglasses. OptiVISOR Specs Item No. Focal Length Magnification DA-2      20″ 1.5 times DA-3      14″ 1.75 times DA-4      10″ 2 times DA-5       8″ 2.5 times DA-7       6″ 2.75 times DA-10       4″ 3.5 times

Donegan OptiVisor DA-2 Headband Magnifier Binocular 1.5X Optical

Donegan Optivisor LP4 Replacement Glass Lens Plate for Magnifier

Optivisor Lens Headband Magnifier Glass Magnifying Visor Glass Headband 4 Lenses - Accessories

Headband Magnifiers, for Magnification, OptiVISOR DA-3/DA-4, by

Donegan OptiVISOR® with Four Acrylic Lens Plates - RioGrande

Speaker refoaming QuadraphonicQuad Home Audio Forum

Donegan Optivisor LP3 Replacement Glass Lens 3 Plate for Magnifier

Turntable setup advice needed for newbie with top cartridges

Optivisor Head Magnifier – Mehta tools

Microelectrophoretic single-cell measurements with microfluidic devices - ScienceDirect

Optivisor Optical Glass Binocular Magnifier - 5 Diopter 2.5X