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Optometer with 38 lenses, Europe, 1901-1930

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Optometrists are trained to examine eyes and to prescribe visual aids, such as spectacles. This piece of equipment is called an optometer and has 38 rotating trial lenses on a stand. The patient was tested with each lens to determine the strength of spectacles required.

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Glossary: ophthalmology

The branch of medicine dealing with the diseases and surgery of the visual pathways (usually the eyes or the brain).

Glossary: optometer

An instrument for measuring the refractive properties of the eye

Glossary: optometry

The professional practice of eye and vision care. Optometry includes the correction of visual defects with lenses or glasses.