S&P 070131 - The Human Eye Main functions: Form a sharp...

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The Human Eye Main functions: Form a sharp image Transduction Initiate Image Processing Analogy to photo camera : Single chamber with aperture (adjust in camera, dilate pupil) and lens. Both retina and film are black. Unlike the camera, the eye must create nerve signals. The eye does not just produce a sharp image: it performs sophisticated image processing. Sclera – outermost layer of the eye; helps maintain the shape of the eyeball, keeping distance between the lens and the retina fixed. Choroid – heavily pigmented, dark in appearance; the layer through which the eyeball receives its blood supply; serves to absorb light, and prevent light scatter. Retina – light-sensitive layer with two types of photoreceptors (cells); rods & cones; transduces light energy into electrical energy Cornea – continuation of the sclera; optical power is created by the interaction of the cornea with the lens. The cornea is the outermost structure of the eye visible from the outside and bends more light than the lens itself; shape and size are fixed. Iris
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This note was uploaded on 04/05/2008 for the course PSYCH 301 taught by Professor Singh,m. during the Spring '07 term at Rutgers.

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S&P 070131 - The Human Eye Main functions: Form a sharp...

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