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Did you know that Mammal
Eyes are composed of two types of receptors, Rod Receptors and
Cone Receptors ?
Did you know that Mammal
Eyes are
composed of two types of receptors, Rod
Receptors and
Cone Receptors?
Rod receptors are primarily responsible for greater Night
Vision and “movement
tracking”, while cone receptors allow for color processing
and greater Daytime Vision. Cat
Eyes have about 25 rods to each
cone? Compare this to the composition of the Human
Eye at
roughly 4 rods to each cone it becomes clear why Cat
Night Vision is
so superior to ours. David and I always get questions about Tiger
Eyes and the quality of “Tiger
Night Vision”. Like
most cats, a Tiger's Eye has a high ratio of Rods to Cones and
as a result they have fantastic Night Vision and are immediately
alerted
to the slightest movement. Another reason Tiger Eyes see so well
at night is due to a special membrane called the “Tapetum
Lucidum”. All cats have this “Tapetum
Membrane” which
is like a mirror that bounces incoming light back and forth in
the eye twice. This harvests as much light as possible in dim and
dark conditions thus increasing the eyes sensitivity. This membrane
is also the reason a Cats Eye exhibits “Eye shine” when
caught in a beam of light. Some unscrupulous Safari
Hunters sometimes
hunt Big Cats at night by locating them at great distances with
a spotlight. For example, Leopard eyes will
reflect light back to such an extent when a spotlight hits them
that hunters can find
them in dense forest canopies. Leopards are extremely elusive cats
and one of the best ways of seeing one is to check out one of the
many Leopard Cams the www.tigerhomes
Animal Sanctuary has set up in Sampson and Midnight’s habitats. If you’re lucky
you can even take a great “Snap Shot” directly from
the web cameras of a close-up of a green Leopard eye!
By the way, at the time of this writing, Midnight is still a Baby
Leopard Cub with juvenile Eye
Coloration. REMEMBER
THE TIGERHOMES WEBSITE SPECIALIZES IN AMAZING EXOTIC ANIMAL WEB
CAMS!
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