Have you ever noticed that cats could run into the dark night chasing its prey? Carnivores is equipped with a pair of eyes with a remarkable ability to be key for them to be stalking prey or other objects in the dark. Compared with humans, cats eye has more light-sensitive cells (rod cells) that help them see in low light conditions.
Cats are animals whose active at dusk or dawn. If in the typical human eye has about 125 million rod cells. While cats have six to eight times more rod cells than human. More number of rod cells also help cats detect any movement in the darkness.
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| Where cat vision really shines is at night; cats have six to eight times more rod cells, which can detect light at low levels, than humans do. (Picture from: http://www.livescience.com/) |
Cat's eye shape is oval, has a large cornea, as well as the tapetum layer that reflects light back to the retina, and is able to collect more light. For this reason, cats can see better in the dark. "Tapetum it can adjust the light waves are seen by the cat, so the prey or objects that previously shaped silhouette can be seen more clearly," said Kerry Ketring, a veterinarian at All Animal Eye Clinic, in Whitehall, Michigan some time ago.
The cat's wide angle view is about 200 degrees, also wider than humans, which is only 180 degrees. This means that the cats do not have to turn their heads to see the object that lies beside him. The cats side view area is also larger so they can recognize the objects located in the corner of their eyes area.
Although cats versed see in the dark, but their ability to see during the day and recognize the color turns out was limited. This occurs because light-receiving cells (cone cells) that has a function in bright conditions on the cat's eye is considerably less. If in the human eye has about seven million cone cells or 10 times more than cats. "Humans can be 12 times better in terms of look and detect movement in daylight than a cat or dog," said Ketring further.
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| Humans can be 12 times better in terms of look and detect movement in daylight than a cat or dog. (Picture from: http://www.3quarksdaily.com/) |
Humans also have three types of cone cells that help see a wider spectrum of color and focus on the colors of red, green, and blue. While cats also have three types of cone cells, but the amount and distribution of each cell was different. So the cat can not see the same color as seen by human beings in general. *** [EKA | FROM VARIOUS SOURCES | LIVESCIENCE | GABRIEL TITIYOGA | KORAN TEMPO 4394]
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