Snellen, Herman

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Snellen, Herman

Dutch ophthalmologist, 1834–1908.

Snellen chart

A chart imprinted with lines of black letters graduating in size from smallest on the bottom to largest on top; used for testing visual acuity.

Snellen reflex

Congestion of the ear on the same side upon stimulation of the distal end of the divided auriculotemporal nerve. Synonym: auriculocervical nerve reflex

Snellen test

A test for visual acuity in which the patient reads a Snellen chart at a certain distance with one eye, then with the other eye, and then with both eyes.
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