A 6-year-old child’s visual acuity of 0.3 may be caused by refractive errors such as myopia, or due to glaucoma or cataract, etc. The child can be treated with prescription lenses for correction, medication and surgery. 1. Refractive error: Children with myopia need to use their eyes scientifically, resting for 5 to 10 minutes every 40 to 50 minutes to avoid eye fatigue. Children can wear frame glasses and corneal contact lenses to correct myopia and improve vision. 2. Glaucoma: Patients with glaucoma can follow the doctor’s instructions to use Trichostatin eye drops, Brinzolamide eye drops, etc., to control intraocular pressure and promote recovery. If the effect of drug treatment is not good, patients can have surgery, such as trabeculectomy. 3. Cataract: Because of the clouding of the lens, cataract patients may suffer from vision loss. Surgery, such as cataract ultrasonic emulsification combined with IOL implantation, is feasible for patients. It is recommended that children with vision loss should consult a doctor in time to assess their condition and follow the doctor’s instructions for treatment.