RETINA
\ɹˈɛtɪnə], \ɹˈɛtɪnə], \ɹ_ˈɛ_t_ɪ_n_ə]\
Definitions of RETINA
- 1919 - The Winston Simplified Dictionary
- 1898 - Warner's pocket medical dictionary of today.
- 1899 - The american dictionary of the english language.
- 1919 - The Concise Standard Dictionary of the English Language
- 1920 - A dictionary of scientific terms.
- 1846 - Medical lexicon: a dictionary of medical science
- 1898 - American pocket medical dictionary
- 1916 - Appleton's medical dictionary
- 1871 - The Cabinet Dictionary of the English Language
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The inner coat of the eye, containing the ends of the nerves of sight; that part of the eye which receives the images seen.
By William Dodge Lewis, Edgar Arthur Singer
By William R. Warner
By Daniel Lyons
By James Champlin Fernald
By Henderson, I. F.; Henderson, W. D.
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A soft, pulpy, grayish, semitransparent, very thin membrane; extending from the optic nerve to the crystalline, embracing the vitreous humour, and lining the choroid; without, however, adhering to either of those parts. It terminates by a defined edge- margo dentalus -at the posterior extremities of the ciliary processes. It is constituted, according to most anatomists, by the expansion of the optic nerve. The retina appears to be formed of several laminae; so joined together, that it is difficult to discriminate them. The one -the innermost-is medullary, and pulpy; the other- the other-is stronger, and fibro-vascular. The retina is the essential organ of vision; on it the images of objects are impressed. Both it and the optic nerve are devoid of general sensibility. They may be punctured or lacerated without pain being experienced. The nerve of general sensibility distributed to the eve is the fifth pair.
By Robley Dunglison
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The innermost tunic and perceptive structure of the eye, formed by the expansion of the optic nerve.
By Willam Alexander Newman Dorland