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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.

Optomeninx, the inner, nervous, tunic of the eyeball, consisting of an outer pigment layer attached to the inner surface of the chorioid, ciliary body, and iris, and an inner layer formed by the expansion of the optic nerve. It comprises an optic or physiological portion which receives the visual rays, and a non-percipient ciliary portion, or pars coeca retinoe, the two being separated by the ora serrata. The optic portion consists of eight layers, as follows (the numbers referring to the layers as shown in the cut): 1, pigment layer, stratum pigmenti; 2, layer of rods and cones, bacillary layer; 3, outer nuclear layer; 4, outer molecular layer; 5, inner nuclear layer;.6, inner molecular layer; 7, ganglionic layer; 8, nerve-fiber layer, stratum opticum; between the layer of rods and cones and the outer nuclear layer is the outer limiting membrane, and covering the stratum opticum is the inner limiting membrane.

Reticular expansion of optic nerve.

The innermost coating of the eye, consisting of a fine network of optic nerves.

The inner coat of the eye, which receives the optical image.

Retinal.

A retiform expansion of the optic nerve in the eye, which receives the impressions that give rise to vision.

One of the coats of the eye, resembling fine network, which receives the impressions resulting in the sense of vision.

The retiform membrane of the eye which receives the impressions, resulting in the sense of vision.

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.

The innermost tunic and perceptive structure of the eye, formed by the expansion of the optic nerve.

The innermost of the three coats of the eyeball, the nerve, or sensitive coat, which receives visual images. [Lat.]

n. [Latin] The semitransparent, internal nervous tissue of the eye which receives the impressions resulting in the sense of vision.