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Cornea   /kˈɔrniə/   Listen
Cornea

noun
(pl. corneas)
1.
The transparent dome-shaped anterior portion of the outer covering of the eye; it covers the iris and pupil and is continuous with the sclera.



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"Cornea" Quotes from Famous Books



... reason of long-standing conjunctivitis of both eyes, attended with partial opacity of the cornea. Disability existed prior to enlistment, consequently soldier is ineligible to the ...
— A Compilation of the Messages and Papers of the Presidents - Section 3 (of 3) of Volume 8: Grover Cleveland, First Term. • Grover Cleveland

... organs of sense,—the eye with its cornea and lens, vitreous humor, aqueous humor, and choroid, culminating in the retina, no thicker than a sheet of paper, and yet consisting of nine distinct layers, the innermost composed of rods and cones, supposed to be the immediate recipients of the undulations of light, and so numerous that ...
— The Pleasures of Life • Sir John Lubbock

... carefully united by rivets or solder, and small defects were repaired by the insertion of quadrangular patches of bronze. The eye-sockets were always left hollow in the casting, and eyeballs of glass, metal, or other materials, imitating cornea and iris, were inserted. [Footnote: Marble statues also sometimes had inserted eyes] Finally, the whole was gone over with appropriate tools, the hair, for example, being furrowed with a sharp graver and thus receiving a ...
— A History Of Greek Art • F. B. Tarbell

... consists of concentrically arranged coats and of refracting media inclosed in them. The coats are three in number, namely, (1) an external protective tunic made up of the sclerotic and cornea; (2) a middle vascular and pigmentary tunic, the choroid; (3) an internal nervous layer, the retina. The sclerotic is the white, opaque part of the outer tunic, of which it forms about the posterior ...
— Special Report on Diseases of Cattle • U.S. Department of Agriculture

... "Sunt geminae Somni portae: quarum altera fertur Cornea; qua veris facilis datur exitus Vmbris: Altera candenti perfecta nitens elephanto; Sed falsa ad coelum mittunt insomnia Manes." ...
— The Poems of Jonathan Swift, D.D., Volume I (of 2) • Jonathan Swift

... been pointed out recently that dream states are largely indebted for their visual elements—what we see in our dreams—to accidental lines, patches, etc., in the field of vision when the eyes are shut, due to the distended blood vessels of the cornea and lids, to changes in the external illumination, to the presence of dust particles of different configuration, etc. The other senses also undoubtedly contribute to the texture of our dreams by equally subconscious suggestions. There is ...
— The Story of the Mind • James Mark Baldwin



Words linked to "Cornea" :   membrane, optic, arcus senilis, eye, oculus, tissue layer, arcus



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