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DeZeng Phoroptor used during eye examinations for testing refraction of the eye; image credit on full record.

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Optometry; DeZeng Phoroptor, Eye Examination Instrument.

DeZeng Phoroptor, early 20th century, brass and cast iron phoroptor instrument commonly used during eye examinations containing different lenses for r... [more detail available via subscription]

p4A Item D9749406
Category:  science & technology    Origin:  America
Type:  medical & dental    Year:  1920 - 1930

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