The fact that the color of the cat's eye, as, indeed, and the eyes of man, depends on the quantity of coloring pigment in the front and back of the eyeball. And, like most human babies, newborn kittens eyes are gray or blue-gray. If the child's eyes will change color only to 6-8 months, eyes kitten turns green or yellow after a few weeks. All this is because melanin in newborns quite a bit, and then it begins to accumulate in iris.
But in cats things with the eye color is slightly different than in humans. Some breeds eye color sex-linked coat color. For example, Siamese cats eyes, usually blue, and the British amber. The problem is that, unlike coat color, eye color in kittens when breeding is very difficult to manage, and "right" eyes are very much appreciated by fans of the breeds.
What occurs inside the eye when the color starts to change? When the kitten is still at the stage of the embryo, it has about 30 pigment centers. Until the end of embryonic development, pigment cells do migrate throughout the body, spreading through coat and iris of the eye. However, by the time of birth of the kitten the pigment in the coat is already settled permanently, but in the eyes continues to accumulate. The saturation of the blue color of the eyes of a kitten depends on the number of pigment granules in the retina of the eye. All colors except blue, are dominant, and thus, with age, the eyes of kittens can only go from blue to some other, but never in blue, if the eyes are not blue at all.
As among people, among cats, there are albino cats with red eyes (sometimes with only one red eye). Albinos have pigment in the retina is completely absent, so under the retina are clearly visible blood vessels. These cats eye color also will not change ever.
Some scientists believe that the color of eyes had something to do with the diet of cats, however, direct evidence is not.
Whatever it was, the eyes of cats — quite a fascinating spectacle, no matter what shade they had.
Advice 2: Why yellow eyes
Yellowing of the whites of the eyes can be caused by many reasons: as a relatively harmless and very dangerous to health that requires immediate treatment. Therefore, to find that his eyes turned yellow, should immediately consult a doctor.
Diseases of the liver and yellowing of the whites. Is there a connection?
Why do whites of their eyes may become yellow? The fact that the yellow coloring of the tissues of the body attached to the pigment bilirubin. In a normally functioning healthy people, bilirubin is degraded in the liver. If the work of this body for some reason is broken, part of the bilirubin is not subject to decay and enter the bloodstream, spreading throughout the body. Thus, very often, the yellowing of the eyes indicates liver diseases. Among them: various forms of hepatitis (especially hepatitis a and hepatitis C), cirrhosis, different parasitic diseases of the liver, for example, opisthorchiasis and echinococcosis. In diseases of this organ, in addition to change the color of the whites of the eyes, you may notice yellowing of the skin, weakness, lack of appetite.
The liver plays a vital role in the functioning of the body, so any failure in its work has a detrimental effect on health and can even lead to death. The sooner you get diagnosed and treatment begun, the better the chances of a favorable outcome.
For what reasons can the yellowing whites of their eyes?
Yellowing of the eyes is not always associated with liver disease. For example, often the cause of this phenomenon is the so-called "Gilbert syndrome" - a hereditary benign pathology. European Nations have a number of people suffering from this disease varies from 2 to 5%, and the peoples of Africa, the figure is much higher – up to 36%. When Gilbert's syndrome is disrupted transport of bilirubin to the liver cells, where it is decay.
Also yellow eyes can be caused by natural aging in the elderly. Many men advancing years there are so-called "pinguecula" - yellow education, mainly in the part of the eye protein, which is closer to the nose. The aging of the conjunctiva – the thin membrane that covers the eye outside, also often accompanied by yellowing.
In some cases, the yellowing of the eye protein can be one of the signs of melanoma – skin cancer.
As you can see, the reasons for this phenomenon are many. Therefore, we can only advise: don't risk in vain, consult a specialist to determine why yellow eyes, and if necessary begin the treatment. After all, the correct diagnosis can only by a qualified physician.