Blurred vision can be caused by refractive errors, such as myopia, which can be improved by optometry and prescription lenses. 2. common ophthalmic diseases such as keratitis, which can affect vision and lead to vision loss if the corneal clouding and edema is located in the pupil area, and is treated with anti-inflammatory, antiviral and antifungal therapy. 3. iritis, which can also cause blurred vision and is accompanied by eye pain, photophobia and tearing. The patient should be given anti-inflammatory, antiviral and antifungal treatment. 4. Glaucoma can also cause blurred vision, accompanied by increased intraocular pressure, eye pain and headache. 5. Cataracts, clouding of the lens, can cause blurred vision. There are many reasons for blurred vision, and a detailed examination should be conducted in the ophthalmology department.