The development of a baby’s vision can be from the first day of life to 8 years of age. The eyes are often closed on the first day of life, sometimes opening and closing. The first few days are spent with little purpose in eye movements. After a few days they start to gaze at light stimuli. In the second week of life, the eyes rotate inward in response to light from a distance of half a meter in the direction of their own movement. At 3 weeks of age, they are able to look at larger objects, distinguish colors, and rotate their eyes in a unidirectional manner. 2 months of age, they can follow the hand of an adult for a long period of time. 3 months of age, they can not only follow objects, but also rotate their heads. 4 months of age, they can lift their heads and often look at their hands. 6 months of age, they can sit up, and when their heads and eyes rotate with objects, their bodies also rotate. At 9 months old, babies can look at a single line and have a visual acuity of about 0.1. By 12 months old, most babies can play with toys, look at objects close to them, and point out their nose, eyes, and hair on their mother’s command. 2-3 year olds have a visual acuity of about 0.5-0.6, which is close to that of an adult. 4-5 year olds have a visual acuity of about 1.5-0.6. At the age of 4-5, the visual acuity is about 1.0, and various eye physiological reflexes have been formed and stabilized, so it is not easy to lose vision at this time. 6-7 years old enters the state of adult vision, and at the age of 8, the eye reflexes are very stable, and the development of vision is basically finished.