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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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This is in direct contrast to the situation with cones, where each cone cell is connected to a single bipolar cell. Without changing, READ ON...
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6 minute of arc per line pair, or 1.[8] The gap between tissue layers naturally formed a bioconvex shape, an ideal structure for a normal refractive index. Aging causes laxity and downward shift of eyelid tissues and atrophy of the orbital fat.[6] This gradually changed as the eyespot depressed into a shallow "cup" shape, granting the ability to slightly discriminate directional brightness by using the angle at which the light hit certain cells to identify the source.
It is largely responsible for color vision in humans, and enables high acuity, such as is necessary in reading.[6] This gradually changed as the eyespot depressed into a shallow "cup" shape, granting the ability to slightly discriminate directional brightness by using the angle at which the light hit certain cells to identify the source. They do have photosensitive cells, but no lens and no other means
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