Eyelid blinking.
eye lashes
RETINA
The sclera of the eye acts like an outer skin to maintain the spherical shape of the eye.
Film or Paper
The iris is the coloured part of the eye.
The camel's third eyelid acts as a windshield against sand. It can help wash the sand out of their eyes, and it's seethrough so they can keep their eyes closed and still see where they are going.
The nictitating membrane is part of a frog's eye. It is just above the lower lid and acts as a protective third eyelid.
the eye is part of a needle
the cornea is the coloured part of the eye
The iris acts like the aperture of a camera lens.
It depends on whether its a "Classic" or some of the other trim packages. You must look up exact part numbers by make, model and year and then keep an eye on trim. They all take 22" length but the attachment varies accross different trims and not all wipers fit the special attachment some trims have. See related link below for one example.
The eye is the part with out the most trouble on the eye wall is the worst