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the eye and the camera
♥ Thursday, August 16, 2007 7:50 PM

HUMAN EYES vs. CAMERA

Human eyes have often been compared to cameras. They are alike in terms of structure, but they have one fundamental difference in functioning mechanism.

Table: Similarities & the Difference between Camera and Human Eye

Function Camera Human Eye


structural comparison between camera and human eye
Similarities
1. opening for light to enter aperture pupil
2. control the amount of light entering camera/eye diaphragm control size of aperture iris muscles control size of pupil
3. refract light glass biconvex lens mainly cornea ;
lens, aqueous & vitreous humor
4. object of light action to form image photosensitive chemicals on film photoreceptors(rods & cones) in retina
5. absorb excessive light to prevent multiple images formation dark internal surface pigmented, dark choroid
Difference
1. focusing mechanism change distance between lens & film change focal length of lens using ciliary muscles