Fig. 63.—SECTION OF THE EYE.
A and B. The sclerotic, choroid, and retina, the three layers or coats which form the walls of the globe of the eye, and enclose its humours.
C C. The iris.
D. The front chamber of the eye, filled with watery humour.
E. The pupil, through which the rays of light pass to
F. The crystalline lens.
G G. The vitreous humour enclosed in cells formed by the hyaloid membrane.
H. An artery which supplies blood to the crystalline lens, and which passes through the centre of the optic nerve.
G. The optic nerve, showing the sheath in which the nerve is enclosed.