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 different forms of eyes in, for example, vertebrates and mollusks are often cited as examples of parallel evolution, despite their, READ ON...
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In some animals, the retina contains a reflective layer (the tapetum lucidum) which increases the amount of light each photosensitive cell perceives, allowing the animal to see better under low light conditions. Light enters the eye from an external medium such as air or water, passes through the cornea, and into the first of two humours, the aqueous humour. So a human can resolve distances of about 0.6 minute of arc per line pair, or 1.When a creature with
It is attached to the ciliary body via a ring of suspensory ligaments known as the orbits or eyesockets. Different kinds of light-sensitive organs are found in a variety of organisms. In many animals, including humans, eyelashes prevent fine particles from entering the eye. The angle of the sharp vision being just a few degrees in the middle of the view, the sharp area thus barely achieves even a single megapixel
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