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A very fine example of an optometer in
brass, ebonised wood and steel, made by and marked F A Hardy & Co
Opticians Chicago Illanois. Patented 29th April 1902. The eyepiece
is held to one eye and the brass screw on the main stem is turned
until the disc comes into clear focus. This measures the correction
required for reading glasses. Has a rare brass eye shield for the
untested eye. Built to a very high standard and in perfect working
order 100 years later. |
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