Blurred vision can be caused by a variety of factors, such as unhygienic eye use, overuse of the eyes and other physiological factors, and does not require special treatment. It may also be caused by diseases such as keratitis, and patients need to follow the doctor’s instructions for medication, surgical treatment, and so on. 1. No treatment is needed: Usually, patients who do not pay attention to eye hygiene, often rub their eyes with their hands or use their eyes excessively can cause blurred vision, which is a normal physiological phenomenon and generally does not require special treatment. Most patients can recover on their own after improving their eye hygiene and habits. 2. Medication: Different medications are used for different causes, including antibiotic drugs, antifungal drugs, anti-allergic drugs and tear drops. (1) antibiotic drugs: clinical often divided into infectious keratitis and non-infectious keratitis, of which bacterial keratitis patients need to follow the doctor’s instructions to use cefazolin, tobramycin and other antibiotic drugs. (2) Antifungal drugs: fungal keratitis, can be used topically 0.25% amphotericin B, 5% natamycin and other antifungal drugs, and also oral itraconazole, fluconazole and other antifungal drugs. (3) Anti-allergic drugs: If it is allergic keratitis, it is necessary to get rid of allergens in time, with the use of cetirizine and other anti-allergic drugs. (4) Artificial tears: If it is non-infectious keratitis, use artificial tears to relieve the symptoms. (3) Surgical treatment: If medication is ineffective, corneal transplantation is also needed under the guidance of a doctor. In addition to the above factors, uveitis, refractive error, eye trauma, etc. can also induce blurred vision and need to be treated according to the doctor’s advice.