The severity of amblyopia is determined by the patient’s best-corrected visual acuity, and the worse the visual acuity, the higher the severity of amblyopia. Amblyopia is a common disease in pediatric ophthalmology, and children with low visual acuity need to judge the severity of amblyopia based on the value of best-corrected visual acuity. If the patient’s best-corrected visual acuity is between 0.6 and 0.8, mild amblyopia exists, between 0.2 and 0.5, moderate weakness exists, and below 0.2, severe amblyopia exists. Amblyopia can be treated, usually before the age of 6, timely amblyopia training can achieve relatively good treatment results, with age, the treatment effect will be worse and worse, more than 12 years of age, amblyopia patients with poor treatment results. It is recommended that amblyopia patients should consult a doctor in time to evaluate their condition and follow the doctor’s instructions for treatment.