There are many diseases that affect vision, and there are different ways to restore vision for different diseases. Common diseases that affect vision include visual fatigue, dry eye, refractive error, amblyopia, glaucoma, cataract, keratoconus, vitreoretinal disease, uveitis, optic neuropathy, etc. Refractive error requires medical optometry to determine the different refractive states of myopia, hyperopia, astigmatism, etc., and the vision can be restored by wearing corresponding corrective glasses; for children over 8 years old with myopia below 600 degrees and astigmatism below 150 degrees, they can consider wearing keratoplasty lenses; for children over 18 years old with a stable prescription for two years, they can wear keratoplasty lenses. Adults over 18 years of age with a stable prescription for more than two years can consider corneal laser surgery or ICL implantation; children with amblyopia can improve their vision through amblyopia training, and the earlier they start training, the better the effect; patients with glaucoma need to control the intraocular pressure with medication or surgery; if the blurred vision is caused by high intraocular pressure and corneal edema, the vision can be improved after the corneal edema subsides after the intraocular pressure is controlled, but patients with glaucoma can improve their vision after the corneal edema subsides. The purpose of controlling IOP is to slow down the development of the disease and maximize the protection of vision; for cataract patients, surgical removal of cataract and implantation of IOL can restore vision; for uveitis, pupil dilatation and hormonal anti-inflammatory treatment are needed to restore vision; vitreoretinal diseases include vitreous hemorrhage, retinal detachment, macular degeneration, retinal vein, arterial obstruction, etc., depending on the condition. Depending on the condition, vitreoretinal surgery, vitreous cavity injection and other treatments are needed; there are also many kinds of optic neuropathies, such as optic neuritis and retrobulbar optic neuritis, which require hormonal shock therapy, complemented by symptomatic treatments such as nerve nutrition and circulation improvement. In short, the disease that affects vision should be diagnosed first, and then targeted treatment should be carried out to maximize the recovery of vision.