Retina
['retɪnə] or ['rɛtənə]
Definition
(noun.) the innermost light-sensitive membrane covering the back wall of the eyeball; it is continuous with the optic nerve.
Typist: Rachel--From WordNet
Definition
(n.) The delicate membrane by which the back part of the globe of the eye is lined, and in which the fibers of the optic nerve terminate. See Eye.
Editor: Mary
Definition
n. the innermost coating of the eye consisting of a fine network of optic nerves.—adj. Ret′inal pertaining to the retina of the eye.—n. Retinī′tis inflammation of the retina.
Inputed by Jeff
Examples
- Far objects are brought to a focus in front of the retina instead of on it, and hence are not visible. Bertha M. Clark. General Science.
- Convex glasses, by bending the rays and bringing them to a nearer focus, overbalance a short eyeball with its tendency to focus objects behind the retina. Bertha M. Clark. General Science.
- The eyeball of a nearsighted person is very wide, and the retina is too far away from the crystalline lens. Bertha M. Clark. General Science.
- The duration of the impression of an object on the retina is capable of illustration by means of the Magic Disc in a great variety of designs, each one of which may represent many movements. Frederick C. Bakewell. Great Facts.
- Even though the muscles of accommodation do their best to pull out and flatten the lens, the rays are not separated sufficiently to focus as far back as the retina. Bertha M. Clark. General Science.
- Near objects are brought to a focus behind the retina instead of on it, and hence are not visible. Bertha M. Clark. General Science.
- The retina of the eye cannot be moved backward and forward, as the screen was, and the crystalline lens is permanently located directly back of the iris. Bertha M. Clark. General Science.
- Even though the muscles of accommodation do their best to bulge and thicken the lens, the rays of light are not bent sufficiently to focus sharply on the retina. Bertha M. Clark. General Science.
- The human eye possesses a most wonderful lens and screen (Fig. 78); the lens is called the crystalline lens, and the screen is called the retina. Bertha M. Clark. General Science.
- Concave glasses, by separating the rays and making the focus more distant, overbalance a wide eyeball with its tendency to focus objects in front of the retina. Bertha M. Clark. General Science.
Typed by Bartholdi