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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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These are then transmitted to the brain via the optic nerve. With aging, the quality of vision worsens due to reasons independent of, READ ON...
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Some arthropods, including many Strepsiptera, have compound eye composed of a few facets each, with a retina capable of creating an image, which does provide multiple-image vision. To clearly see an object far away, the ciliary muscle is relaxed, which stretches the fibers connecting it with the lens, flattening the lens. Thus, for humans to be able to see while moving, the brain must compensate for the motion of the head by turning the eyes. As for the optic
The extent to which the pupil dilates also decreases with age. If the grid is 1 meter away, then the grid should be about 8. The pit deepened over time, the opening diminished in size, and the number of lines and decrease the width of each line until the grid appears as a solid grey block. Light must first pass though the centre of
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