How long does it take a newborn baby to see it?

Neonatal period (0 ~ 28 days): Babies will respond to light after birth, but their eyes are not yet fully developed, and their visual structure and optic nerve are not yet mature, and their vision is only 1/30 of that of adults. He can chase the object in front of him, but his vision is only about 45 degrees, and his vision is only 1/30 of that of an adult. And you can only chase people or things horizontally and in front of us 18 ~ 38 cm. Newborns prefer to see complex shapes and curves and bright contrasting colors.

1 ~ 3 months: after the full moon, the child has the ability to stare and fix his eyes, and will look at the person holding him, but it will not last long, and his eyes will easily lose coordination. After three months, the baby's vision can reach 180 degrees, and he can see his hands and feel his presence. At this time, most babies' vision can "follow" the moving object smoothly, and they can also fix their eyes on an object.

4 ~ 6 months: At 4 ~ 6 months, the baby's retina has developed well, and he can see things from near to far, and then from far to near. The three-dimensional sense is established from the age of 4 months. In the meantime, babies will look for sound sources or track moving objects. For example, when the mother walks around the room, the baby's eyes will also turn. At this time, the baby can turn his body and reach out to catch what his eyes see, such as the small pendant hanging above the crib. The visual acuity at this time is about 0. 1.

6 ~ 12 months: after 6 months, the eyes can be focused, and the child will adjust his posture so that he can see clearly what he wants to see. When I was 8 months old, I would have a seeking response to something that suddenly disappeared in front of my eyes. I especially like to track the objects in front of me with my eyes, and the cooperation between my eyes and my hands is smooth. At this time, the baby's vision remains between 0. 1-0.2. After 8 months, the baby can really identify his relatives with his eyes. At this time, the baby takes the initiative to use the whole body's visual, auditory and other sensory organs, especially the sense of touch to understand the world. 1 year, visual acuity is about 0.2.