Decrease in hearing and blurred vision may be caused by physiological factors such as aging, or it may be caused by pathological reasons such as insufficient cerebral blood supply, Meniere’s disease, and Koyanagi Harada disease. 1. Physiological factors: with ageing, all aspects of the body functions of the elderly show different degrees of aging degeneration, vitreous clouding, cochlear function degradation, etc., which can lead to blurred vision and hearing loss. 2. Insufficient cerebral blood supply: cerebral atherosclerosis, cervical spondylosis and other factors lead to insufficient cerebral blood supply, ischemia and hypoxia of brain cells, affecting the optic nerve and auditory nerve dysfunction and leading to blurred vision and hearing loss. 3. Meniere’s disease: Meniere’s disease patients due to the labyrinth of the inner ear membrane accumulation of water, can lead to otogenic vertigo, tinnitus, hearing loss, blurred vision and other symptoms. 4. Koyanagi’s disease: Koyanagi’s disease is a clinical syndrome that mainly manifests as diffuse exudative uveitis (uveitis) in both eyes, in which the patient suffers from vision loss in addition to headache, tinnitus, nuchal rigidity, as well as graying, alopecia, vitiligo, and other clinical syndromes that involve multiple organ systems. It is recommended that patients with symptoms such as blurred vision and hearing loss should consult a doctor to evaluate their condition and follow the doctor’s instructions.