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The Genothalmic Refractor
ARCHIVAL ITEMS
instructions; book
Fisher, W. B.; General Optical Company, Inc
North America: USA, New York, Mount Vernon
1922
paper; cardboard
overall: 208 mm x 138 mm
2016.651
ARCHIVAL ITEMS
instructions; book
Fisher, W. B.; General Optical Company, Inc
North America: USA, New York, Mount Vernon
1922
paper; cardboard
overall: 208 mm x 138 mm
Descriptive manual of instruction for a refracting unit/phoro-optometer, together with a short description of the unit. Small portrait format, printed in black and white on 46 pages, hardbound with green paper-covered cardboard endboards. Includes an annotated illustration of the instrument as well as comparative illustrations of Stevens Phorometer, Maddox Rods, Risley Rotary Prisms and instructions on near vision acuity testing and muscle-balance/phoria testing.
2016.651
Gift of Howard Harris Opticians, 2016