Elderly people who experience dizziness accompanied by blurred vision should consider the following points: First, acute cerebrovascular diseases, such as acute stroke, cerebral embolism, cerebral infarction, acute cerebral hemorrhage, and transient cerebrovascular insufficiency of blood supply, are considered to have clinical symptoms such as dizziness and blurred vision. Secondly, if the elderly have a clear history of hypertension, when the high pressure >180mmHg or low pressure >120mmHg or more, there will be obvious increase in intracranial pressure, hypertensive crisis, hypertensive encephalopathy, at this time will also have this clinical symptoms and performance. Thirdly, if the elderly have a history of diabetes, they will also have symptoms caused by hypoglycemia when their blood glucose is <3.9mmol/L, or when their blood glucose is too high and causes diabetes combined with ketoacidosis or lactic acidosis. Fourth, if the elderly have serious cardiogenic diseases, they will also have such clinical manifestations when they have unstable angina pectoris of coronary heart disease, malignant arrhythmia, and severe heart failure.