Donegan Optical Company Inc. Optivisor DA-5 2.5 Power (Works Best at 8")

The OptiVISOR is a precision-made binocular magnifier that is worn on the head leaving both hands free. Can be instantly tilted downward when needed and upward when not in use. Can be worn over regular prescription or safety glasses.

8" focal length.

Comes with dial-adjustable, conforming headband, ABS high-impact comfort band, optical glass lenses mounted in an interchangeable frame. Six lens powers available, plus an attachable auxiliary OptiLOUPE lens (all sold separately) for additional magnification.