cornea

Definitions

  • WordNet 3.6
    • n cornea 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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Webster's Revised Unabridged Dictionary
  • Interesting fact: The shark cornea has been used in eye surgery, since its cornea is similar to a human cornea
    • n Cornea (Anat) The transparent part of the coat of the eyeball which covers the iris and pupil and admits light to the interior. See Eye.
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Century Dictionary and Cyclopedia
  • Interesting fact: The cornea is the only living tissue in the human body that does not contain any blood vessels
    • n cornea The firm, transparent anterior portion of the eyeball. It is of circular outline, concavo-convex, with the convexity forward, bounding the anterior chamber of the eye in front, by its margin continuous with the sclerotic, and having its outer surface, as a rule, covered with a delicate layer of the conjunctiva. In the human eye it forms about one sixth of the entire eyeball. Its convexity is greater than that of the sclerotic, forming a comparatively larger portion of a smaller sphere than the sclerotic. The cornea is so called from its hardness, being likened to horn; it is also known as the tunicacornea pellucida or pellucid horn coat of the eye, in distinction from the sclerotic. See cut under eye.
    • n cornea In entomology, the outer surface of an insect's compound eye. It is generally smooth, but may be hairy. The word is also used to designate the outer transparent lens of each facet of a compound eye, and the surface of an ocellus or simple eye. See cornea-lens.
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Chambers's Twentieth Century Dictionary
    • n Cornea kor′ne-a the transparent horny membrane which forms the front covering of the eye
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Etymology

Webster's Revised Unabridged Dictionary
Fem. sing., fr. L. corneus, horny, fr. cornu, a horn. See Horn

Usage

In literature:

The CORNEA is the transparent projecting layer, that forms the anterior fifth of the globe of the eye.
"A Treatise on Anatomy, Physiology, and Hygiene (Revised Edition)" by Calvin Cutter
The eye really {195} has two lenses, for the cornea acts as a lens, but is not adjustable.
"Psychology" by Robert S. Woodworth
These last are large, and of a purple hue, while their course is in the direction of the circumference of the cornea.
"The Dog" by Dinks, Mayhew, and Hutchinson
Eyes large and exposed, with flat cornea.
"Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 4" by Various
This covering is transparent, and is the cornea.
"Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6" by Various
If there is any circulation, there should be an emerald green discoloration of the cornea of the eye.
"The Social Gangster" by Arthur B. Reeve
AQ'UEOUS HUMOUR, the limpid watery fluid which fills the space between the cornea and the crystalline lens in the eye.
"The New Gresham Encyclopedia. Vol. 1 Part 2" by Various
The corneae, too, are very convex; and consequently the range of vision is vastly wider than ours.
"Butterflies and Moths" by William S. Furneaux
In shape, the cornea is circular and prominent, resembling a miniature watch-glass, about 1/25 of an inch thick.
"A Treatise on Physiology and Hygiene" by Joseph Chrisman Hutchison
Observe the eyes and identify the parts similar to those of the human eye: lid, lash, tear-duct, cornea, iris, and pupil.
"A Guide for the Study of Animals" by Worrallo Whitney
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In poetry:

Now, Dantzic wheat before you floats —
Now, Jesuits from California —
Now, Ceres, link'd with Titus Oats,
Comes dancing through the "Porta Cornea."
"Corn and Catholics" by Thomas Moore

In news:

Intrastromal (in-truh-STRO-muhl) corneal rings are plastic inserts placed in the cornea to correct low levels of nearsightedness.
Both surgeries use lasers to cut flaps in the cornea to correct its shape.
Lasek (laser-assisted subepithelial keratectomy) cuts only the outside surface of the cornea.
"Professor Nayar treats the cornea as a mirror , so if you look at what's imaged in the mirror , you can see many details of what a person is looking at," he said.
About a year ago, he and Dr Nishino realized that the cornea could be viewed as the mirror in such a system, and the lenses as the camera.
00 AM on 11/26, issued at 2:39 AM Alma, GA Baxley, GA Blackshear, GA Bristol, GA. Cornea Inlay Improves Near Vision in People With Presbyopia.
It has something to do with like corneas or some other doctor thing but it's still pretty sweet to see a dude without a head.
The cornea is the clear covering over the colored iris and pupil of the eye.
The cornea and lens of the eye help focus light on the retina so that the eye can see.
Sometimes, refractive surgeons cannot achieve the best correction on the cornea, so we're seeing more lens surgeries.
Don't save scleral lenses for only the most difficult and irregular corneas when others may also benefit.
LASIK surgery promised to free me of the glasses I'd worn since childhood—but I'd have to have a tiny incision in each cornea.
One of the contact lenses sliced Laura's cornea, causing a viral infection in her left eye .
Dan Tran cuts out the damaged cornea of patient Anmol Deo, 17, at Pacific Hills Surgery Center in Laguna Hills.
I'm also selling my corneas, one of my lungs and a piece of my liver.
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In science:

The ultraviolet laser has the additional benefit of being invisible to the human eye, primarily due to absorption in the cornea and lens29.
Bringing the Visible Universe into Focus with Robo-AO
There is a version of this construction that is Morse-Bott in flavor, which uses a variant of the Cornea-Lalonde “cluster” technology [ 14].
Effect of Legendrian Surgery
Acknowledgement: I thank Octav Cornea, Yves F´elix, John Oprea and JeanClaude Thomas for several very helpful conversations about this work.
Variations on a conjecture of Halperin
This usage accords with Cornea’s homotopical nilpotency in this case.
Variations on a conjecture of Halperin
See also Biran-Cornea for further discussion of this technique.
Gauged Floer theory of toric moment fibers
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