An eye that is blurred may have conjunctivitis, keratitis or refractive error. 1. Conjunctivitis: If a patient develops conjunctivitis, the eye may have a foreign body sensation, redness in the eye and blurred vision in the eye, which can be treated with medicines such as ofloxacin eye drops and acyclovir eye drops under the guidance of a doctor. 2. Keratitis: If the corneal defense ability of the patient is weakened, it will cause inflammation of the cornea, which will lead to blurred vision, you can choose tobramycin, acyclovir and other eye drops under the guidance of the doctor for treatment. 3. Refractive error: some patients with hyperopia, astigmatism, myopia, can also cause one eye to see clearly, this is a common refractive error, may be only one eye refractive error occurs, can be under the guidance of the doctor glasses or surgery. One eye to see things blurred, should go to the regular hospital for relevant examinations, to clarify the specific causes, and active treatment.