Similarities Between the Eye and the Camera

First of all, both of them have an opening at the center for light to enter; aperture for the camera and a pupil for the eye. The camera has a diaphragm to control the size of the aperture(to control the amount of light entering camera/eye) while the eye has iris muscles to control the size of the pupil. Cornea is the main part of the eye(included are lens, aqeuos and vitreous humor) that functions to refract light as a glass biconvex does in the camera. Photosensitive chemicals on film(camera) and photoreceptors in the cornea(eye) are the objects of light action to form image. The last similarity is that they both absorb excessive light to prevent multiple images formation using a dark internal surface in the camera and a pigmented, dark choroid in the eye.

cite:http://library.thinkquest.org/28030/eyeevo.htm