Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- proper noun A kind of
eye chart .
Etymologies
Sorry, no etymologies found.
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Examples
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This chart which is called a Snellen Eye Chart, measures visual acuity.
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In the United States, visual acuity (how clear and sharp our vision is) is generally measured using a Snellen Chart.
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These numbers indicate how well a person can see a particular line on the Snellen Chart at a specified distance.
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Paraponyx diminutalis Snellen (Pyralidae: Lepidoptera) as a serious pest of Nymphoides cristatum in Keoladeo National Park, Baharatpur, Rajasthan.
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Most of us are familiar with the big "E" Snellen Chart on the ophthalmologist's wall.
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After being assistant to the ophthalmologist H. Snellen Sr. in the renowned eye-hospital Gasthuis voor
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Every school, private and parochial as well as public, should supply itself with the Snellen card for testing eyes.
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Moreover, as shown below, it is needed by children able to pass satisfactorily the Snellen test.
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It is better to have ten separate letters of exactly the right size and the same size than a row of letters on one card, as in the Snellen test, otherwise memory will aid the eye, or, as happened recently, a whole class may agree to feign remarkable nearsightedness or farsightedness by confusing letters learned in advance from the card.
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Practically, however, it is out of the question at the present time to have the majority of children given a more thorough test than that provided by the Snellen card.
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