The darkening of the patient’s eyes may be caused by hemorrhage in the fundus of the eye, low blood pressure or hypoglycemia, and may also be caused by dark plaques on the surface of the patient’s eyes, such as the conjunctiva, which can be treated with medication or surgery as prescribed by the doctor, and the specific treatment is related to the patient’s condition. Darkening of the eyes when the patient’s eyes are visualized may be caused by fundus hemorrhage, low blood pressure, or hypoglycemia. Patients with fundus hemorrhage can be treated with medications such as lecithin complex iodine to promote the absorption of the hemorrhage and improve vision. If the blood in the eye is not absorbed for a long time, the patient can be treated with surgery, such as vitrectomy. Patients with hypoglycemia and hypotension can take oral high sugar-containing food to raise blood sugar, and intravenous fluids to raise blood pressure, in order to alleviate the symptoms of darkness in front of the eyes. If the patient’s conjunctiva appears black plaque, usually caused by hyperpigmentation, the patient’s eyes look dark. If it does not affect the visual function then no treatment is needed, when the area is large patients can be treated with surgical excision to improve the appearance. It is recommended that patients with darkened eyes seek prompt medical attention to evaluate their condition and follow the doctor’s instructions for treatment.