EYE

n. I. Gr., anna S>fy. Lat, oculus. Fr., ceil. Ger., Auge. It., occhio. Sp., ojo. 1. The organ of vision, situtated in the orbit It consists of the eyeball, bulb or globe of the eye. the prolongation of the optic nerves, and the six extrinsic muscles, four straight SCHEMATIC DIAGRAM OF THE EYE, SHOWING A LONGITUDINAL SECTION THROUGH THE EYEBALL. (DRAWN BY DR. H. MAC DONALD.) a, the sclerotic: h, the chorold; e, the retina: d, the hyaloid membrane; e, the cavity of the eyeball; /, the lens: a, the Iris; t, the cornea; t, the anterior chamber; j, the c:llary muscle and ligament; t, the canal of Petit; I, the central retinal vewels; m, the optic nerve. and two oblique. It is a spherical body, and consists of three tunics. 1st. Cornea and sclera. 2d. Iris, ciliary proce es, and chproid. 3d. Retina. Within these tunics are contained three refracting media, E, he; Ea, ell; O, go: I, die; Ia, iu; N, in; N, tank; [s. 794]