Blurred eyes can be considered students, office workers and other long time to maintain close vision, resulting in the muscles around the eyes appear sore, swollen, fatigue, should pay attention to the combination of work and rest, appropriate relaxation of eye muscles can be alleviated. If rest is not relieved, consider pathological conditions, such as refractive error, corneal disease, lens clouding, uveitis, glaucoma, and lesions of the fundus. 1. Refractive error: Refractive error can lead to blurred vision, commonly including myopia, hyperopia and astigmatism. When combined with myopia or hyperopia, parallel light rays refracted by the refractive system of the eye and focused before or after the retina can lead to blurred vision. Patients with presbyopia have a decrease in ciliary muscle regulation due to age, which leads to blurred near vision. Patients need to go to the hospital for optometry to determine whether the refractive error is combined; 2. Corneal diseases: When combined with corneal leukoplakia, corneal cloudiness, or corneal opacity, they can lead to blurred vision. When combined with keratitis, the corneal stroma will show signs such as edema, and if it happens to be in the center of the periocular area, it will significantly affect vision and can also show symptoms of blurred vision. As age increases, the density of the lens will gradually increase, resulting in blurred vision. In addition to age, trauma, systemic metabolic diseases or radioactive factors can lead to lens clouding, resulting in blurred vision. 4. uveitis: refers to inflammation of the uvea itself, with factors such as infection and autoimmune factors. Glaucoma: It is caused by congenital or acquired factors that block the circulation of atrial fluid in the eye, which leads to an increase in intraocular pressure and causes damage to the optic nerve. When the patient has an acute attack, it can show symptoms such as eye swelling and pain, blurred vision, eye congestion, nausea, vomiting, etc. When glaucoma enters the absolute stage, it can lead to irreversible loss of vision and even blindness; 6, fundus lesions: common fundus lesions include diabetic retinopathy, wet macular degeneration, dry macular degeneration, macular fissure, etc., all of which can lead to blurred vision.