Snellen, Herman

S11-868020 (snel'en) 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.

单词	snellen, herman
释义	DictionarySeeSnellen chartSee Snellen test Snellen test Snellen test [′snel·ən ‚test] (medicine) A test for visual acuity presenting letters, numbers, or letter E's in various positions, with the symbols varying in size; if the smallest are read at a distance of 20 feet (6 meters), vision is recorded as 20/20, or normal. Snellen, Herman Snellen, Herman S11-868020 (snel'en) 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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