| snell | A short line of horsehair, gut, etc, by which a fishhook is attached to a longer line. Source: Websters Dictionary (01 Mar 1998) |
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| Snell's law | For two given media, the sine of the angle of incidence bears a constant relation to the sine of the angle of refraction. Synonym: Descartes' law, Snell's law. (05 Mar 2000) |
| Snellen | Hermann, Dutch ophthalmologist, 1834-1908. See: Snellen's test types, Snellen's sign. (05 Mar 2000) |
| Snellen's sign | <clinical sign> Bruit heard on auscultation over the eye in a patient with Graves' disease, due to the hyperdynamic circulation. (05 Mar 2000) |
| Snellen's test types | Square black symbols employed in testing the acuity of distant vision; the letters vary in size in such a way that each one subtends a visual angle of 5' at a particular distance. (05 Mar 2000) |
| Snellen chart |
display consisting of a printed card with letters and numbers in lines of decreasing size; used to test visual acuity
Ãâó: wordnet.princeton.edu/perl/webwn
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| Snellen test |
a test of visual acuity using a Snellen chart
Ãâó: wordnet.princeton.edu/perl/webwn
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| Snellen's reflex |
unilateral congestion of the ear upon stimulation of the distal end of the divided great auricular nerve; called also auriculocervical nerve r.
Ãâó: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| 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.
Ãâó: 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.
Ãâó: www12.mawebcenters.com/coltslaboratories/gloss.ivn...
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| snell | Dutch ophthalmologist who introduced the Snellen chart to study visual acuity (1834-1908) |
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| snell | display consisting of a printed card with letters and numbers in lines of decreasing size |
| snell | a test of visual acuity using a Snellen chart |
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