Dullness of the head, lack of clarity of the brain and blurred eyes may be caused by physiological reasons such as lack of sleep and mental tension, as well as pathologic reasons such as insufficient cerebral blood supply and cerebrovascular diseases, which can be treated by patients by improving their lifestyles and following the doctor’s instructions for medication. 1. Physiological causes: dizziness, lack of clarity and blurred eyes may be caused by lack of sleep, mental tension, anxiety and stress. In daily life, we should pay attention to rest, strengthen physical exercise, adjust the mind, relax, etc. If necessary, we can go to the psychological center of the hospital for consultation. 2. Pathological causes: It may be caused by insufficient blood supply to the brain, cerebrovascular diseases, etc. They will lead to ischemia and hypoxia of brain tissues, which can lead to dizziness, lack of clarity and blurred eyes. It is recommended that these patients go to the hospital immediately for a head CT and MRI examination, as well as checking blood pressure, blood sugar and blood lipids, etc., so as to clarify the cause of the disease and cooperate with the doctor for treatment. The symptoms of dizziness, lack of clarity and blurred eyes may also be caused by other diseases, and if they occur frequently and are not easily relieved, it is recommended to consult a doctor for treatment in a timely manner.