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includes the choroid coat, ciliary body, and iris.

is vascular and darkly pigmented and performs two functions: to nourish other tissues of the eye and to keep the inside of the eye dark.

forms a ring around the front of the eye and contains ciliary muscles and suspensory ligaments that hold the lens in position and change its shape (focus).

The ability of the lens to adjust shape to facilitate focusing is called

is a thin, smooth muscle that adjusts the amount of light entering the pupil, a hole in its center

between the cornea and iris

between the iris and vitreous body and housing the lens

anterior and posterior chamber make up the anterior cavity, which is filled with

circulates from one chamber to the other through the pupil.

covers the back side of the eye to the ciliary body.

The inner tunic consists of the _, which contains photoreceptors

the point of sharpest vision in the retina.

where nerve fibers leave the eye and where there is a blind spot.

The large cavity of the eye is filled with

Light waves must bend to be focused, a phenomenon called