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Different kinds of light sensitive organs are found in a variety of organisms. The simplest eyes do nothing but detect whether the surroundings are light or dark, while more complex eyes can distinguish shapes and colors. The visual fields of some such complex eyes largely overlap, to allow better depth perception, as in humans; and others are placed so as to minimize the overlap, such as in rabbits and chameleons.
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night vs.[14][17] Within the anterior segment are two fluid-filled spaces: the anterior chamber and the posterior chamber. If all three, READ ON...
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Rod cells contain the protein rhodopsin and cone cells contain different proteins for each color-range. They can distinguish between light and dark, but no more. All of the individual components through which light travels within the eye before reaching the retina are transparent, minimising dimming of the light. Most of these anatomic and physiologic processes follow a gradual decline.The optokinetic reflex is a combination of a saccade and smooth pursuit movement. Similarly, while moving,
In simple terms, this allows human beings to see red, green and blue light. Exaggerated convergence is called cross eyed viewing (focussing on the nose for example) . To look at an object closer by, the eyes rotate 'towards each other' (convergence), while for an object farther away they rotate 'away from each other' (divergence). The movements of different body parts are controlled by striated
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