The innermost coat of the eye is called the retina. This coat contains
the nerve endings of the optic nerve which, coming through the opening
in the bony orbit, passes through the sclerotic and choroid coats. After
entering the eye, the optic nerve divides into myriads of fibers, which,
spreading from the point of entrance at the back of the eye, form a
fibrous network all over its inner surface. In addition to this network
of nerve fibers and highly specialized nerve cells, tiny blood vessels
entering with the optic nerve branch out on all sides over the retina.