1. What is the classification and etiology of amblyopia? Answer: (1) Strabismic amblyopia: it occurs in one eye, the child has strabismus or has had strabismus, and it is common in monocular constant strabismus patients with the onset of the disease under the age of four years, and it is due to the active inhibition of visual impulse of the strabismus by the cerebral cortex, and long-term inhibition of amblyopia is formed, and the difference between visual inhibition and amblyopia is only in the amount, and the inhibition is generally lifted when injecting for the strabismus while the amblyopia is a persistent loss of visual acuity. The earlier the age of onset of strabismus, the faster the inhibition is produced and the deeper the degree of amblyopia. (2) Refractive amblyopia: Because of the different vision of the two eyes, the size and clarity of the retinal image of the two eyes are different, and the macular image of one eye with higher refractive error is large and blurred, which causes insufficient stimulation of the fusion reflex of the two eyes and fails to form binocular monocularity, thus generating passive suppression, and those whose refractive error of the two eyes is more than 3.00D and have higher refractive error often form amblyopia and strabismus. Passive and active inhibition exist at the same time. (3) Refractive amblyopia: Mostly binocular, occurring in children or adults with high myopia and astigmatism without corrective lenses, most of them with myopia over 6.00D, hyperopia over 5.00D, and astigmatism ≥2.00D or with both astigmatism. The visual acuity of both eyes is equal or similar, and there is no binocular image fusion dysfunction, so it does not cause macular functional inhibition. (4) Morphological deprivation amblyopia: In infancy, due to ptosis, corneal clouding, congenital cataract, or too much covering time after eyelid surgery, light stimulation can not enter the eyeballs, which prevents or blocks the macula from receiving morphologic stimuli, thus resulting in amblyopia. 2. Do I need to wear glasses all the time? A: Glasses are a common treatment for amblyopia. If the doctor prescribes eyeglasses for your child, it means that your child has a refractive error in his/her eyes and will need to wear eyeglasses all the time. This is very important! 3. Do I need to cover my eyes for amblyopia? A: Coverage is only needed for children whose corrected visual acuity is more than two lines apart in both eyes. By covering the eyes, the amblyopic eye is given more opportunity to be used. The frequency and period of masking should be adjusted according to the age of the child’s condition, please follow the doctor’s instructions. 4. Can amblyopia treatment reduce the number of glasses worn or even eliminate glasses in the future? A: The purpose of amblyopia treatment is to perfect the development of the child’s optic nerve, not to reduce the degree of hyperopia or astigmatism. The effect of the training is more in the improvement of visual acuity with the same pair of spectacles rather than the reduction of spectacle prescription. 5. Can I stop training when my child’s visual acuity reaches 0.8 or even 1.0 with glasses? A: Even if the patient’s visual acuity has reached 0.8 or even 1.0 through amblyopia treatment, it does not mean that the visual acuity has reached optimal development and will not recur in the future. If the primary condition is not completely removed, stopping the training too early may lead to recurrence of amblyopia. In general, it is important to continue training for at least three months after the corrected visual acuity reaches the standard, it is best to monitor the child’s integration ability and stereoscopic vision, and it is also important to follow up with the hospital every six months.