Tip 1: When the babies change their eye color
Tip 1: When the babies change their eye color
Often, parents, when a child appears,First of all, they peer into his eyes, wondering which of them the baby is like. However, immediately after the baby was born, determine whose eyes it is impossible. It is worth noting that the native eye color in children appears much later.
Instructions
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During the first year of life, children canseveral times to change the color of the eyes, and up to three months in most cases it is generally impossible to determine. The baby's visual acuity is very low, approximately at the level of sensation of color, but with age, it gradually increases and by the year it reaches half the level of visual acuity of an adult.
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In the first days of a child's life,Determine by the reaction of his pupil to light. But already in the second week he begins to fix his eyes on certain objects for a few seconds. Vision will be fixed only in the third month of the child's life, by the half-year he will be able to clearly distinguish figures, relatives, toys, and a year - even drawings.
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Skin tone, hair color and eye colorDepends on the presence in the body of the pigment melanin. In most cases, the babies in the first months of life have a light blue or light gray color, since in the iris of babies there is absolutely no melanin.
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As the child develops, the eye color beginsto change, this means that his body began to accumulate melanin. If the color of the eyes darkens - means melanin in the body enough, when they turn gray, blue or green - the pigment is very small.
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During the entire development of the child, the color of his eyes canChange several times. This suggests that the amount of melanin varies in the process of development and growth of crumbs. Basically, the color of the eyes completely takes its final color only to three or four years of the child's life.
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The amount of melanin in the bodyMay also be due to heredity. The reason for this is the dominance of signs at the genetic level. The kid can receive them not only from parents, but also from distant relatives.
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Sometimes children are born with a phenomenon,called heterochromia, which gives the children eyes of different colors. There are also children albino with reddish eyes. If the melanin is completely absent in the iris, the color of the eyes is determined by the blood contained in the vessels of the iris. There are cases when people with light eyes have a change in color during periods of illness or severe stress.
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Throughout the world, you can not meet a singlespecialist who could accurately give an opinion about what color your baby's eyes will be. Yes, probably this is not the most basic thing in life, because the most important thing is for your child to develop healthy and beautiful, and look at the world around him with kind and cheerful eyes.
Tip 2: How old is the color of the eyes?
Most often newborn babies appear onlight with blue eyes. And it does not depend on what color the eyes have parents. Heredity will manifest after a few months and then the color of the child's eyes may change.
Physiological features that affect the color of the iris
The main pigment, which determines the hair color,A shade of skin and the color of the eyes of any person - melanin. Its concentration has a fundamental effect on the color of the iris of the human eye: the more melanin, the darker the eyes. Thus, in brown-eyed people, the maximum pigment concentration is observed, while in blue-eyed people the minimum concentration is observed. To a small extent, the color of the eye is determined by the concentration of the fibers of the iris itself. Here, too, a direct relationship is observed: the higher the concentration, the darker the eyes. The red eyes of albinos are characterized by a complete absence of pigment, resulting in visible blood vessels contained in the iris. The amount of pigment in the cells is affected by the hereditary factor. Dark color is a dominant feature, and light color is a recessive one. In the world, the largest number of people have brown eyes, and most rarely are green-eyed representatives of the human race, their only 2% of the total population of the planet.At what age does the color of the eyes become permanent
According to the physiological characteristics of buildingsHuman body, the pigment is produced by special cells - melanocytes. Their activities do not begin immediately after the birth of the baby, but after a while. Thus, the pigment accumulates gradually, from day to day. That's why some parents note that the color of the baby's eyes changes almost daily. On average, the apparent changes in the color of the iris begin at the age of three months of the baby. Most often, the final color of the eye can be judged at six months of age. However, there are cases when the change in the amount of pigment can last up to two, and even up to three years. Sometimes a complete heterochromy arises in the body - an uneven distribution of the pigment. This leads to the fact that the eyes of the baby are painted in different colors. Partial heterochromia affects the coloration of different parts of the iris. However, small differences in the color of the eyes are not very noticeable. However, in case of occurrence of heterochromia, it is necessary to show the child to the ophthalmologist in order not to face the undesirable consequences of this disorder. To guess in advance what color eyes the baby will have is impossible. From the point of view of genetics, this sign is inherited according to the law of Mendel: brown-eyed children are born with brown-eyed children, and blue-eyed children have blue eyes. However, only time can give an accurate answer to this question.Tip 3: How does the eye color change in children
The color and shape of the child's eyes is one of the mainSigns of the similarity of the baby to the parents, especially if the mother and father have eyes of different colors. Even before the advent of the child, parents are guessing which of them the baby will inherit the color of the eyes.
Instructions
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When an infant is born, curious parentsthey hasten to examine all the details and details, to find out what eyes their children have. But the fact is that almost all children are born with light, mostly blue eyes, this is due to the small amount of pigment in the iris of the eyes. Uninformed parents, whose eyes, for example, brown and mum and dad, this can lead to bewilderment. It is necessary to understand that with time the pigmentation will be filled, and the eyes of the child will be such that the genes were passed to him by the parents.
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Most often, the color of the iris of the eyeApple changes in the first 6 months after the birth of the child, less often it occurs within two to three years. Find out if the color of the baby's eyes becomes different, you can carefully look into the shell: if visible small dark blotches, then eventually the color of the eyes will darken.
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Of course, if both parents have bright eyes,the baby also inherits this color. A controversial issue in the event that the mother and father have eyes of different colors, one, for example, has blue eyes, while the other has brown eyes. Dark pigment is a stronger gene, but this does not mean that the child will have dark eyes. It matters, what eyes were at the grandmothers, grandfathers and what genes the kid was transferred more.
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The human eyeball has several membranes. The upper layer is a transparent cornea, behind it is the vascular membrane, which is represented in the anterior part of the eye by the iris. Inside the iris is the pigment melanin. The depth of dark color depends on the amount of this pigment. The more it is in the cells, the darker the eyes. People who have a dark eye color on the planet are more numerous than those who have blue or light gray eyes. This is due to the fact that the genes are dominated by the signs responsible for a large number of melanin.
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Genes that the child has been transferred from parents,affect absolutely all the little things and nuances: what color are the eyes, and when they will acquire the final color. In a small percentage of people, eye color changes are also observed in adulthood. For example, brown eyes become lighter, and gray ones acquire a greenish tinge. People with blue eyes often observe that their eye color becomes brighter with age.
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Immediately, once a child was born, it is very difficultto draw a conclusion about what all the same he will have eyes. But it will be a little time, and parents will be able to understand what color their kid will look at this world.
