The process of the child’s vision development, because the newborn baby’s eye is small, the macula area cells are small, the regulation function of the eye muscle is not yet perfect, so the vision is not sharp, can blurred to see about 60cm distance from the face of the person. With the improvement of visual regulation mechanism, the child’s vision rapidly improved, generally 3-4 months of age, can already see in front of the eyes and far away from the room it people. Some studies have shown that children already have the ability to discriminate between color and brightness. As the child ages, the child’s sensitivity to spatial information, such as depth, solid steering, and positional awareness, also gradually improves. A child’s vision develops gradually after birth, generally around one year old baby’s vision is 0.2-0.25; two-year-old baby is 0.5; three years old is 0.6; gradually develop, 5-6 years old when the vision reaches 1.0, and establish intact stereo vision function.