Blurred vision in the left eye and normal vision in the right eye may be caused by pseudomyopia, refractive error, bacterial keratitis, etc., which need to be treated by improving eye habits, wearing glasses and topical medication. 1. Pseudomyopia: patients with blurred vision in the left eye and normal vision in the right eye may be caused by long-term ciliary muscle spasm and other pseudomyopia, if this is the case, by improving eye habits, pay attention to rest, and the use of medication, such as seven leaves of digitalis bisabolol eye drops and other treatments, vision can be restored to normal. 2. Refractive error: If patients use their eyes excessively for a long time or use their eyes in an incorrect posture, it may lead to myopia and other refractive errors, which need to be corrected by improving eye habits, paying attention to rest, and wearing eyeglasses. 3. Bacterial keratitis: If the patient’s left eye suffers from bacterial keratitis, it may lead to blurred vision because of corneal damage, and the patient needs to reduce the frequency of eye use, pay attention to rest, and use drugs, such as levofloxacin hydrochloride eye drops and other anti-bacterial treatment. It is recommended that once the patient finds that the vision in the left eye is blurred and the right eye is normal, the patient should consult a doctor in time to complete the relevant examinations and treat the cause of the disease. In addition, drugs may cause certain side effects, should be used under the guidance of a doctor, do not blindly use drugs.