Optic nerve damage can be caused by trauma, retinopathy and metabolic diseases. 1. Trauma: Most patients with optic nerve damage are traumatized, mostly due to injuries near the orbital rim and contusions caused by sharp torsion between the eyeball and the optic nerve. 2. Retinopathy: Glaucoma, hypertension, arteriosclerosis and inflammation of the optic nerve may cause retinopathy, which may lead to the damage of the optic nerve. 3. Metabolic diseases: Diabetes and thyroid disorders are more common in the clinic, which are mainly due to the abnormalities of the secretion glands in the body, thus indirectly affecting the optic nerve of the patient. The optic nerve is damaged by a number of factors, it is recommended that patients go to the ophthalmology department of the hospital in time for a detailed examination to clarify the cause of the disease and carry out targeted treatment.