Amblyopia can be simply understood as the normal development of visual function due to a variety of reasons, so the clinical diagnosis of amblyopia are required to have the causes that lead to the occurrence of amblyopia. For example: 1, obvious refractive disparity: two eyes with unequal degrees, the high number of eyes is prone to amblyopia; this is due to the high degree of the eye can not see clearly, then it will be suppressed due to the imbalance of vision with the low degree of the eye, which leads to the occurrence of amblyopia. 2, monocular strabismus occurring in early childhood: strabismus occurring before 5-6 is prone to amblyopia, especially in eyes with monocular strabismus. Generally speaking, the younger the strabismus occurs, the greater the likelihood of amblyopia; while those with alternating skew in both eyes are less likely to develop amblyopia. This is because the eye with monocular deviation is always not looking at, it will be inhibited by the brain and lead to the normal development of visual function, while the two eyes can alternate deviation, because the two eyes can rotate the gaze, the vision of both eyes can be developed. 3. High farsightedness and high myopia in both eyes: Due to the high degree of farsightedness or myopia, the eyes are not clearly imaged when looking at far and near, so the vision of both eyes cannot develop normally and amblyopia is formed. 4. Lesions occurring during early childhood that affect the clear imaging of the eyes: such as congenital cataracts, ptosis that obscures the pupil, corneal opacity, etc. These conditions result in the retina at the base of the eye not having the opportunity to receive clear images, thus hindering the normal development of vision and leading to the occurrence of amblyopia. Mothers and fathers should be alert to the presence of the above risk factors for amblyopia in their children’s daily lives and take their babies to eye health screenings at the right time to detect the risk factors for amblyopia at an early stage. Risk factors for amblyopia at a glance 1. monocular strabismus that develops before the age of 5-6 years; 2. significant refractive error; 3. moderate to high hyperopia; 4. high myopia; 5. lesions that affect clear imaging of the eye that occur before the age of 5-6 years: congenital cataracts, severe ptosis, corneal lesions, etc.