Blurred vision can be caused by physiological factors, or it can be caused by trauma or other lesions. 1. Physiological factors: Excessive eye use, excessive fatigue, bright light stimulation and other physiological factors can lead to transient blurring of vision, usually after rest, the symptoms can be relieved, and do not require special treatment. 2. Trauma: If the patient suffers from facial collision, head trauma and other traumatic stimuli, it may cause optic nerve avulsion, optic nerve wall fracture and other lesions, the patient may have sudden blurred vision, which may be accompanied by severe pain, color vision abnormalities and other uncomfortable symptoms. 3. Other lesions: refractive error, keratitis, glaucoma, cataract, optic nerve atrophy, intraorbital tumor, iritis and other diseases, patients may also have blurred vision, accompanied by conjunctival congestion, eye swelling, headache, visual field defects and other symptoms. It is recommended that patients with blurred vision seek prompt medical attention to assess their condition and treat them under the guidance of a doctor.