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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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Thus, for humans to be able to see while moving, the brain must compensate for the motion of the head by turning the eyes. Such eyes are typically roughly spherical, filled with a transparent gel-like substance called the vitreous humour, with a focusing lens and often an iris which regulates the intensity of the light that enters the eye.Eyes are organs of vision that detect light. The secondary colors can be further complimented with primary colors to see tertiary colors.Each
Too much light being let in could damage the retina; too little light makes sight difficult. When the muscles exert different tensions, a torque is exerted on the globe that causes it to turn.e. The smooth pursuit movement can move the eye at up to 100°/s in adult humans.Rapid eye movement, or REM for short, typically refers to the stage during sleep during which the most vivid dreams occur. This enables snails
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