Suddenly get up black eyes, generally considered due to position change caused by the transient episodes of black haze, the causes are mainly the following: 1, coronary heart disease and or cervical spondylosis caused by insufficient arterial blood supply, caused by insufficient arterial blood supply to the eye. 2, hypoglycemia caused by insufficient blood supply to the eye. 3, arterial thrombosis. If a transient black haze often occurs, it is recommended to improve the fundus angiography, to exclude the organic lesions of the eye, and at the same time to exclude the systemic cardiovascular and cerebrovascular diseases, it is recommended to do the cardiac ultrasound, cervical vascular ultrasound, craniocerebral magnetic resonance and other examinations, usually to live a regular life, avoid staying up late, appropriate physical exercise, strengthen the physical condition, to quit smoking, quit drinking, and so on.