Blurred vision is characterized by blurred vision, double vision or blurred vision. Progressive blurred vision can have different causes depending on whether it is accompanied by eye irritation. First of all, we can exclude those that occur more often in daily life and can be relieved by rest or corrected by glasses: if blurred eyes occur after a long period of close eye use and can be recovered by resting with eyes closed for a while, consider it to be caused by visual fatigue or dry eye, which can be treated by resting both eyes, applying hot compresses and eye drops to relieve dry eye fatigue; if it is clear to see near and blurred to see far, consider it to be caused by myopia, which can be corrected by myopic glasses or myopic laser surgery; if it is blurred to see near and blurred to see far, consider it to be caused by myopia. If the blurred vision in the near and blurred vision in the distance is caused by presbyopia, presbyopic glasses can be used for correction. Other causes of progressive blurred vision that cannot be corrected with glasses should be promptly seen at an ophthalmology clinic: (1) gradual, painless vision loss (can last weeks, months or years): (1) eye diseases: corneal degeneration, cataract, primary open-angle glaucoma, chronic closed-angle glaucoma vitreous opacity, chorioretinitis, age-related macular degeneration, diabetic retinopathy, optic neuritis, optic nerve retinitis, retinitis pigmentosa. (2) Systemic diseases: brain tumor, encephalitis, meningitis, other central nervous system diseases, variable craniocerebral trauma, hypertension, diabetes mellitus, leukemia, etc. (2) Vision loss with ocular congestion and pain: keratitis, scleritis with superficial scleritis, iridocyclitis, total uveitis, septic endophthalmitis, total uveitis orbital cellulitis. Progressive blurred vision may contain a variety of causes, which can be resolved on their own if corrected by rest or glasses. If unexplained progressive blurred vision occurs and cannot be corrected with glasses, you should promptly visit an ophthalmologist to identify the cause and treat the cause.