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118 ESOTERIC ANTHROPOLOGY.
common sensation. The rays of light, passing through
the crystalline lens of the eye, form a perfect camera
obscura picture upon the retina ; and the optic nerve
conveys the idea of that picture
Fig. 39.
SECTION OF TnE EYE.
to the mind. The
Fig. 39 is a longitudinal section of the globe of the eye. 1. The scle
rotic, thicker behind than in front. 2. The cornea, received within the
anterior margin of the sclerotic, and connected with it by means of a
beveled edge. 3. The choroid, connected anteriorly with (4) the ciliary
ligament, and (5) the ciliary processes. 0. The iris. 7. The pupil. 8.
The third layer of the eye, the retina, terminating anteriorly by an
abrupt border at the commencement of the ciliary processes. 9. The
canal of Petit, which encircles the lens (12) ; the thin layer in front of
this canal is the zonula ciliaris, a prolongation of the vascular layer oi
the retina to the lens. 10. The anterior chamber of the eye, containing
the aqueous humor; the lining membrane.by which the humor is
secreted is represented in the diagram. 11. The posterior chamber.
12. The lens, more convex behind than before, and inclosed in its
proper capsule. 13. The vitreous humor inclosed in the hyaloid mem
brane, and in cells formed in its interior by that membrane. 14. A
tubular sheath of the hyaloid membrane, which serves for the passage
of the artery of the capsule of the lens. 15. The neurilemma of the
optic nerve. 16 The arteria centralis retinae, imbedded in the center
of the optic nerve.