cornean.
/ˈkɔːniːə/ Anatomy.
a. The transparent convexo-concave portion of the anterior covering of the eyeball, so called from its horny consistence.Also called lucid cornea or proper cornea, as distinguished from the opaque cornea or sclerotic coat.
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1398 J. Trevisa tr. Bartholomew de Glanville De Proprietatibus Rerum (1495) v. v. 108 Of the four webbes in the formest partyes of the eye the fyrste hyghte tela arena..the thirde Cornea, horny.]
1527 L. Andrewe tr. H. Brunschwig Vertuose Boke Distyllacyon sig. Pijv The moystenes which is in cornea of the iyen.
1633 P. Fletcher Purple Island v. xxxi. 54 (note) The second is Cornea or, hornie tunicle.
1664 H. Power Exper. Philos. i. 1 The diaphanous Cornea [of the Flea's eye].
1799 Med. & Physical Jrnl. 1 332 An Instrument for cutting the Cornea, in the Operation of extracting a Cataract.
1840 G. V. Ellis Demonstr. Anat. 104 On the inner or concave surface of the proper cornea is a thin elastic membrane—the ‘elastic cornea’.
1872 T. H. Huxley Lessons Elem. Physiol. (ed. 6) ix. 226 In front..the fibrous capsule of the eye..becomes transparent, and receives the name of the cornea.
b. conical cornea n. a conical projection of the cornea.
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1854 W. Mackenzie Pract. Treat. Dis. Eye (ed. 4) 686 It is generally the case that objects appear multiplied to an eye affected with conical cornea.
1874 G. Lawson Dis. Eye (ed. 2) 48 Conical cornea is a staphylomatous bulging of the middle portion of the cornea, caused by a thinning of that structure in the central region.
This entry has not yet been fully updated (first published 1893; most recently modified version published online December 2018).
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