||The dark circular opening in the center of the iris; contracts and expands to regulate the amount of light entering the eye.
||The colored part around the pupil of the eye; made of a series of circular muscles that constrict to make the pupil smaller in bright light or larger in dim light.
||The tough white or bluish white covering that surrounds the eyeball and helps it maintain its shape.
||The curved, transparent, outer surface of the eyeball; covers the iris and pupil and lets light through to the inside of the eye.
||Any of the vessels, as arteries, veins, or capillaries, through which the blood circulates.
||The movable lid of skin that serves to cover and uncover the eyeball
||Short, thick, curved hairs growing as a fringe on the edge of an eyelid
||The connection or relation of ideas, feelings, sensations, etc.; correlation of elements of perception, reasoning, or the like.
||A strategy, such as a phrase or formula, that increases the effectiveness of memory.