Interesting Information - Facts Behind Cat's Eyes. Cats' night vision is very strong - Cats can easily distinguish between green, blue and red colors. However, the real advantage of cat eyes is that they can see at night. Cats' eyelids open at night, when exposed to a little light, the layer of the eye called the iris makes the pupil dilate (almost 90% of the eye) so they can see light more easily. When exposed to brighter light, the system works in reverse to protect the retina, the pupil shrinks and turns into a thin line.
There is a layer that is not found in the human eye. This layer is behind the retina, functioning as a light receiver. When light falls on this layer it is immediately reflected back, the light passes twice through the retina. Therefore, cats can see easily when there is little light. Even in the dark, when the human eye cannot see.
This layer is also the reason why cats' eyes glow at night. This layer is called the tapetum lucidum crystal and can reflect light. Thanks to these cystals, light that falls behind the eye is reflected back to the retina. Some of the light is reflected back into the lens, so the eyes shine. Thanks to this structure, the amount of light received by the eye increases so that it can see in the dark. Therefore, cats can see better in the dark. This is not a form of bio-luminescence, because animals do not produce light, it is the result of reflection.
Another reason why cats can see in the dark is also because there are more rod cells than cone cells in their retinas. As we know, stem cells are only sensitive to light. They form black or white shadows depending on the light coming from the object, but they are very sensitive to even small amounts of light. Interesting Information !
The structure of a cat's eye is different from that of humans
. In a cat's eye, there is a third membrane called the "nictitating membrane". This membrane is transparent, and moves from one part of the eye to another. For example, cats can blink their eyes without having to close them all. This third membrane allows the cat's eyes to be protected when hunting. In addition, other objects such as dust do not get into their eyes, so their eyes remain clean and moist; so cats don't need to blink their eyes as often as humans. If cats blinked their eyes all the time like humans to keep their eyes clean and moist, this would cause difficulties for them when hunting. Not blinking is one of the perfections of God's creation for this creature.
Are cat eyes sensitive to movement?
Cats cannot see up close as well as humans and cannot focus on objects that are close to them. But God has created sensory hair with a strong sensory mechanism for cats. Thanks to smell and sensory hairs, cats can easily detect at close range. Although these beautiful creatures are difficult to see at close range, they can easily sense at a distance of two to six meters. This distance is enough for the cat to hunt.
Another characteristic of cats' eyes is that they are sensitive to movement, beauty and what is appropriate to their distance of vision. The cat's eyes and brain separate each movement frame by frame. A cat's brain can perceive more images than ours. For example, they can more easily see signs of electronics on a television screen than humans. This is a special talent given by Almighty God to all cats. This is because cats catch their prey based on moving objects.
Quoted from several literary sources and biology books.
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