About 1 month after the baby is born, the hearing is basically fully developed and mature, but the vision takes a long time to develop slowly. About 6 to 8 months after the baby is born, it can basically see as clearly as an adult.
Although the baby’s eyes can already see things when he is born, his brain is still unable to process this visual information, so for a period of time, everything the baby sees is blurred. As the baby’s brain develops, what he sees becomes clearer, so that he has the tools to understand and master the world around him. Although the baby can only see the face of the person holding him when he is just born, as the baby grows up month after month, the range he can see clearly will also increase.
Within 1 month
One week after birth, the baby’s vision tends to be nearsighted. It can focus on objects 8 to 15 centimeters away, and can also follow moving objects with its eyes. After a week, he can see objects at 3 meters away, he will also learn to track moving objects, and he likes to look at human faces or high-contrast patterns, and the movements of his eyes are not coordinated enough. At more than one month, the baby can see objects within 15-30 cm in front of the eyes clearly and can look at objects.
2 months
At 2 months, the baby’s visual concentration becomes more and more obvious, and he likes to look at moving objects and familiar faces of adults. Can look at objects in a coordinated manner, distinguish colors, but cannot distinguish shades. The eyeball can move with the object within 90 degrees. When an object quickly approaches the front, there will be protective reflexes such as blinking. Look at the small hand for more than 5 seconds.
3-4 months
At 3 months, he can fix his vision, see objects about 75cm away, and his vision is about 0.1. The gaze time has been significantly extended, and the line of sight can still move with moving objects. They are very sensitive to colors. Babies have a preference for colors. Their preferred colors are red, yellow, green, orange, blue, etc., so we often use red toys to entice children.
5-6 months
With more blinks, you can accurately see the object in front of you, pick it up, and play in front of you. Hang the handbell next to the cradle or crib. When the child accidentally touches the handbell, observe whether the baby notices something somewhere due to the sound. When the child sits up to play, his hands can play with objects under the control of his eyes, he will stare at what he gets, and his hands and eyes begin to coordinate. Show the toy in front of your baby and move slowly up, down, left, and right to observe whether the baby can follow it consciously.
7-8 months
Can distinguish the distance and space of objects; like to find toys that are suddenly missing; play “peek-and-see” games with your baby, and observe the baby’s excitement and response time.
9-10 months
The line of sight can move up and down with the moving objects, can follow the falling objects, find the fallen toys, and can distinguish the size, shape, and moving speed of the objects. Can see small objects, can start to distinguish simple geometric figures, and observe different shapes of objects.
11-12 months
The line of sight can move up and down, left and right with moving objects, and can follow falling objects; vision can reach 0.2 at 1 year old.
1-2 years old
After 1 year old, he likes to read books, can distinguish objects, and imitate movements. Under the constant stimulation of external environmental light, the child’s vision is gradually developing. By the age of 1.5, his vision can reach 0.4, and he can see small things such as crawling bugs and mosquitoes and can look at small toys 3 meters away. It can also distinguish simple shapes such as circles, triangles, and squares.
2-5 years old
Children at this stage can judge the spatial concepts of object size, up and down, inside and outside, front and back, and near and far. 2-3 years old: binocular vision development is the most vigorous. At 2-3, the vision reaches about 0.5-0.6, which is almost close to the adult vision, but at this time it is very easy to cause vision loss. At the age of four or five, his vision is about 1.0, and various ocular physiological reflexes have formed and become stable, and it is not easy to lose vision at this time.
6 years old
Enter adult vision at the age of six or seven.
The stereo vision function can not reach normal until 9 years old.
