Presbycusis causes

• Hereditary: Features like early aging of the cochlea and susceptibility of the cochlea for drug insults are genetically determined.
• Atherosclerosis: May diminish vascularity of the cochlea, thereby reducing its oxygen supply.
• Dietary habits: Increased intake of fatty diet may accelerate atherosclerotic changes in old age.
• Diabetes: May cause vasculitis and endothelial proliferation in the blood vessels of the cochlea, thereby reducing its blood supply.
• Noise trauma: Exposure to loud noise on a continuing basis stresses the already hypoxic cochlea, hastening the presbycusis process.
• Smoking: Is postulated to accentuate atherosclerotic changes in blood vessels aggravating presbycusis.
• Hypertension: Causes potent vascular changes, like reduction in blood supply to the cochlea, thereby aggravating presbycusis.
• Ototoxic drugs: Ingestion of ototoxic drugs like aspirin may hasten the process of presbycusis.

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