Light enters the eye through the cornea. 光通过角膜进入眼睛。
Outer layer such as cornea serves a role to reflect the images. 外层,比如角膜可以起到反光的作用。
cornea corneae
[ noun ] 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 <noun.body>
Cornea \Cor"ne*a\ (k?r"n?-?), n.; pl. {Corneas} (-?z). [Fem. sing., fr. L. corneus horny, fr. cornu a horn. See {Horn}.] (Anat.) The transparent part of the coat of the eyeball which covers the iris and pupil and admits light to the interior. See {Eye}.
Oregon lawmakers voted last summer to finance only cornea and kidney transplants, joining a minority of states that don't pay for transplant operations such as those of hearts, bone marrow and livers.
"I don't get down as frequently as I used to, but when we had to make the decision on the cornea transplant, it rehashed all the garbage again," the mother said.
"We've got one monkey who was treated 14 months ago, and his cornea is still clear," he adds.
These tests, on patients who volunteered, showed that the special laser could hone away microscopic layers of the cornea to reshape the lens and do so without producing any scarring or clouding of the lens.
Ennis said he had called twice to make sure that his 8:45 a.m. appointment with Cohen to discuss cornea implant surgery would be on time.
Since the eyes do not have to be removed as urgently, the brain-dead body does not have to be maintained artificially, and the cornea may wait four or five days before transplanting.
The profile of the cornea can be altered and tests are being carried out on injectable lenses made of gels. One of the most common eye defects, especially in old people, is the cataract in which the lens becomes clouded.
The procedure, called radial keratotomy, changes the curve of the cornea, which acts as a lens for the eye.
Max Dallas, wearing dark glasses, has been relegated to first-base coach until his eyes recover from recent cornea implant surgery.
"We receive the eyes in the lab and examine the cornea through the split-light.
Also arrested over the weekend were 11 morgue attendants, including one man who had previously worked for the Eye Bank, a non-profit organization that helps find donor organs for cornea transplant patients.
The excimer laser delivers pulses of light only a few billionths of a second long, so once a doctor determines the desired shape of the cornea, the sculpting process would take only about 30 seconds.
"I don't know whether we ever will have a cornea immediately for everybody who needs one, but that's the goal," Ms. Dahl says.