The American encyclopedia and dictionary of ophthalmology Edited by Casey AWood, assisted by a large staff of collaborators . Chromatie AV)erration. fraction of the rays of different colors, so that colored images are pro-duced about the focus of the lens. Aberration chromatique. (F.), n. Deviation of the rays of light fromthe principal focus of a curved lens or mirror, thus producing a col-ored image at the focal point. Aberration of light. In optics, comprises an extensive series of phe-nomena, one of which, discovered by Bradley in 1728, is the variationin the apparent position of a star, d
The American encyclopedia and dictionary of ophthalmology Edited by Casey AWood, assisted by a large staff of collaborators . Chromatie AV)erration. fraction of the rays of different colors, so that colored images are pro-duced about the focus of the lens. Aberration chromatique. (F.), n. Deviation of the rays of light fromthe principal focus of a curved lens or mirror, thus producing a col-ored image at the focal point. Aberration of light. In optics, comprises an extensive series of phe-nomena, one of which, discovered by Bradley in 1728, is the variationin the apparent position of a star, due to the motion of the observerwith the earth.—(C. F. P.) (G.) Spherical aberration. See Aberration. Any deviation from the Aberration, SpharischeAberrazione. (It.), n normal cromatica. (It. See Aberration, Tscherning has constructed this instrument, for de-termining the presence or absence of aberration in the human eye,. Techernings Aberroscope. 28 ABFALL (see figure) consisting of a plano-convex lens whicli, on its planeside carries a micrometer in the form of little squares. One looks,in making the test, at a distant luminous point through the lens,moving it 10 to 20 centimeters from the eye in order to observewhether the lines then appear curved or not; if the latter there isno perceptible (G.) Subsidence; (G.) To fall off; to fall (G.) (G.). (G.) To moisten or (G.) To separate by filtration; to (G.) To stain by losing a color; or to make (G.) To flow off; to (G.) An outflow, a (G.) A (G.) A wound made by a seton-needle; the tract of a Muskeln. (G.) Abductor (G.). Efferent (G.) (G.) Flat, (G.) Cir
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