by Donegan
(14)Buy new:
3 used & new from $36.41
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OptiVISOR is a precision binocular headband magnifier which permits unrestricted 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. 3.5 X Magnification at 4 inches. Note: The number on the lens is the product number, not the magnification strength.
