Blurred vision may be caused by physiological aging or conjunctivitis, cataracts and other pathologies. 1. Physiological aging: with age, the eyes will generally appear physiological aging, such patients usually appear to see close to the difficulty, easy to see under the light blurred and other symptoms, commonly known as presbyopia. 2. Conjunctivitis: Conjunctivitis patients usually do not have visual impairment, but if the conjunctival inflammation spreads to the corneal tissue, patients may experience vision loss, blurred vision and other symptoms. 3. Cataract: Cataract patients may experience different degrees of vision loss due to clouding of the lens, and in severe cases, even blindness. It is recommended that patients with blurred vision should consult a doctor in a timely manner to assess their condition and follow the doctor’s instructions for reasonable treatment.