There is a highly concealed eye disease called monocular amblyopia, which is characterized by normal vision in one eye and very poor vision in the other eye, and no abnormal performance when both eyes see at the same time. Because of its strong concealment, many parents fail to detect it in time, resulting in the child having normal vision in one eye and the other eye being a virtual nullity. Monocular amblyopia is characterized by a poorly developed amblyopic eye being hidden by a good eye with normal development and clear vision, thus making both eyes appear normal on the surface, making monocular amblyopia very well hidden. Even kindergarten vision exams may not be able to screen for it, and it is usually discovered in the teenage years or even when the adult driver’s license is taken, but by this time it is past the age of amblyopia treatment and there is no cure. We would like to remind parents of children to pay attention to whether their children have this highly concealed amblyopia, regardless of whether their eyes appear abnormal on the surface. So apart from going to the hospital for a formal and careful examination, how can you detect monocular amblyopia at home through easy methods? The best way to detect monocular amblyopia – alternate masking of one eye For children under four years old, alternate masking of one eye (always completely) allows the child to identify small toys three meters away from one eye. If the child is quiet and can correctly identify the toy when covering one eye, but cries or scratches the cover or cannot correctly identify the toy when covering the other eye, it indicates that the vision of the uncovered eye is very poor and there is a possibility of monocular amblyopia, so go to the hospital for examination as soon as possible. For children over four years old who are more expressive, let the child stand as far away from the TV as possible, and ask the child if the clarity of the picture on the TV is the same between the two eyes, if there is a big difference between the clarity of the two eyes, it means that there is a possibility of monocular amblyopia in one eye, so go to the hospital for examination as soon as possible. Why is monocular amblyopia difficult to detect In monocular amblyopia, although the amblyopic eye is poor, the other eye is very good vision, and it is normal when both eyes see things at the same time, so it is difficult to be detected. So why is it that some are not detected even during the physical examination of the eyes at school? The main reason is psychological: congenital monocular amblyopia patients, when found that they have a congenital monocular vision defect, they have a sense of inferiority, afraid of being recognized by others to this defect, he deliberately disguised. Since kindergarten to primary and secondary school, the annual routine physical examination, monocular amblyopia patients to disguise the defect is to use the healthy eye peek when checking the vision of the amblyopic eye, so that the years are not detected, the physical examination form is actually recorded on the vision of the healthy eye, only when encountering a particularly strict attitude of the physician, peek situation will be found, and at this time has often missed the best period of treatment, amblyopia The best age for treatment is from 3 to 5 years old (preschool age). So don’t ask your child if he or she can see clearly, asking doesn’t always get the child’s true answer, you must bring your child to the hospital for a careful and serious examination to know if your child’s eyes are healthy.