Your Eye Cares
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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The lens, behind the iris, is a convex, springy disk which focuses light, through the second humour, onto the retina. The first humour is a clear mass which connects the cornea with the lens of the eye, helps maintain the convex shape of the cornea (necessary to the convergence of light at the lens) and provides the corneal endothelium with nutrients.In many countries, stuffed cow's eyes are considered a delicacy. If
They can distinguish between light and dark, but no more.[14] The cornea and lens help to converge light rays to focus onto the retina. Vergence movements are closely connected to accommodation of the eye. It does have two points at which it is different; the fovea and optic disc. The iris, between the lens and the first humour, is a pigmented ring of fibrovascular tissue and muscle fibres. It
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