| Snellen's chart |
a chart imprinted with block letters (Snellen's test type) in gradually decreasing sizes, identified according to distances at which they are ordinarily visible; used in testing visual acuity. See also Snellen's test type, under test type.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| Snellen's chart |
A chart used for testing central visual acuity, consisting of lines of letters, numbers or symbols in graded sizes drawn to Snellen's measurements. Each size is labeled with the distance at which it can be read by the normal eye. It is most often used for testing vision at a distance of 20 feet, but charts may be drawn for testing at reading distance (14 inches) or intermediate distances.
출처: www12.mawebcenters.com/coltslaboratories/gloss.ivn...
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| Snellen's 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.
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