Vision loss can be due to a variety of ophthalmic diseases, such as cataracts, refractive error, advanced glaucoma, fundus disease, and optic nerve disease. It may also be caused by complications from other systemic diseases or psychological factors. To treat vision loss, the primary cause should be identified and treated for the cause. If it occurs after a long period of close eye use, consider it to be caused by visual fatigue or dry eye disease, then you should rest both eyes and order eye drops to relieve visual fatigue and treat dry eye disease; if it is clear to see near and blurred to see far, consider it to be caused by myopia, then you should go to a hospital or regular optical store for optometry and prescription; if it is blurred to see near and clear to see far, consider it to be caused by presbyopia, then you should wear suitable spectacles. In the above cases, after rest and glasses, vision can be restored and improved. If you cannot improve your vision, you should consult a doctor promptly, and the possible causes are as follows: in terms of urgency, if you have sudden vision loss, consider vascular disease (such as retinal artery blockage, retinal vein blockage, vitreous hemorrhage, ischemic optic neuropathy), retinal detachment, optic neuropathy, etc., which requires oral medication, systemic infusion or surgery; if you have gradual and slow vision loss, consider corneal degeneration If there is a gradual and slow decrease in visual acuity, corneal degeneration, cataract, primary open-angle glaucoma, chronic closed-angle glaucoma, age-related macular degeneration, diabetic retinopathy, etc., then conservative drug treatment or surgery is feasible according to the condition. In terms of concomitant symptoms, if it is accompanied by red eyes and photophobia and tearing, it is considered to be caused by eye inflammation, such as keratitis and iritis, which should be treated with anti-inflammatory therapy according to the cause of inflammation; if it is accompanied by red eyes and eye pain, but also accompanied by eye swelling, headache, nausea and vomiting, it is considered to be caused by high intraocular pressure, such as acute attack of closed-angle glaucoma, which should be treated with intraocular pressure reduction and anti-inflammatory therapy; if it is accompanied by vision loss and blocking sensation, it is considered to be vitreous If there is no organic change in the eye, it should be considered as psychogenic disease or hysteria, which should be treated according to the cause. Most of the eye diseases can be manifested as vision loss, if it cannot be recovered by rest and glasses, you should go to the hospital for eye examination in time to make a clear diagnosis and treat the cause.