Optometer with 38 lenses, Europe, 1901-1930
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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The branch of medicine dealing with the diseases and surgery of the visual pathways (usually the eyes or the brain).
An instrument for measuring the refractive properties of the eye
The professional practice of eye and vision care. Optometry includes the correction of visual defects with lenses or glasses.