1, the baby’s normal visual response check method Check method 1: first cover the baby’s side of the eye, and then shine a flashlight light on the other side of the uncovered eye. If the pupil shrinks immediately after being illuminated, it is a normal visual response. Test the other eye in the same way, if the pupil does not shrink with the light, it is abnormal. Check method 2: 2 months old baby has fixed vision reaction and transient reaction put the bottle or toy in front of the baby, if the baby in front of see something a moment to show blinking action, it is normal visual reaction, that is, transient reaction; then the baby’s eyes will stare at the things in front of the eyes for a certain time, this is the so-called fixed vision reaction. When the baby is older, the eyes can move with the movement of what they are staring at. Check method 3: 3-4 months old baby has the phenomenon of optomotor eye vibration put a cylinder with black and white stripes in front of the baby’s eyes, while moving and turning the cylinder horizontally, observe whether the baby’s eyes follow the cylinder to turn back and forth. If the eyeballs turn with, that is, the normal visual response. Tips: There are individual differences in the development of your baby’s vision, some may be a little early, some a little late. Only when there is a significant retardation, it is possible that the visual impairment. 2, baby vision impairment examination method Check method 1: Observe the eye movement to observe the baby in the eye rotation with or without tremor, if there is that the eye fast speed left and right shaking, then there is likely to be visual impairment. Check method 2: Observe the ability of the eyes to track objects by placing a 10 cm diameter red flannel ball at 15 cm from the baby’s eyes, 1.5 months old baby, the eyes can follow the red flannel ball from right to left or from left to right to the center line; 4 months old baby, both eyes can move 180 degrees with the red flannel ball from right to left or from left to right. Check method 3: Observe for answering smiles. 2 months old babies will smile answeringly when someone is facing them and teasing them (but not making a sound or touching their body). Check method 4: Observe the ability of the eyes to gaze at objects At 4.5 months, the baby can gaze with both eyes at small colored pills placed on the table, such as sugar pills, small balls, etc. Tips: If the baby is 4.5 months old, the above checks are not up to the requirements, there may be visual impairment, need to go to the ophthalmology department early for further examination. 3, different age baby vision examination method Stage 1: objective observation method within 2 years old with objective observation method, check the recipe for January fear to February moving (fear of light, moving refers to the activities of adults to turn the eyeballs); April touch to see colored objects; June near the object can grab; August presence to follow the eye (adult fingers to where, the baby’s vision to see where, and fixed vision immobile); 1 year old accurate finger nostrils; 2 years old walking to avoid things. In addition to this, 4 to 7 months of age, if there are problems with vision, crawling and playing with toys, demeanor behavior, usually slower than babies of the same age, less accurate, appear a little clumsy. Stage 2: Hand and animal image examination method 3 to 5 years old babies can be examined by hand and animal image vision chart. It should be noted that the baby should be taught to recognize the visual acuity chart earlier at home patiently and repeatedly, otherwise the accuracy of the results will be affected. Stage 3: Adult visual acuity chart for babies over 5 years old. If the cooperation is good then the visual acuity can be measured. The normal visual acuity of our children at different ages is, 2 years old: 0.4 to 0.5, 3 years old: 0.5 to 0.6, 4 years old: 0.7 to 0.8, 5 years old: 0.8 to 1.0, 6 years old: 1.0 or more. Tips: If your baby’s eyesight is found to be faulty after testing as described above, he or she should be seen and treated promptly. When covering one of the baby’s eyes with your hand, the baby laughs happily or struggles against it, while covering the other eye without such reaction, it means that there is a problem with the vision of this eye, and you should take the baby to an ophthalmologist. In the process of the baby’s growth and development, it is best for the mother to have some understanding of the baby’s vision development so that she can monitor the development of the baby’s vision at any time. When there are problems with vision, such as some congenital eye diseases, or strabismus, amblyopia and other abnormalities that are not easily detected, as long as careful observation can be detected early, for the baby to fight the first treatment time.