Hand numbness and blurred vision are usually caused by cervical spondylosis, cerebral infarction and subarachnoid hemorrhage. 1. Cervical spondylosis: If the patient suffers from cervical spondylosis, such as lumbar intervertebral disc hyperplasia, which leads to the compression of local nerve tissues, the patient may experience hand numbness, and cervical spondylosis can also lead to the patient’s sympathetic nerves to be stimulated by overexcitement, which will lead to the phenomenon of blurred vision. 2. Cerebral infarction: atherosclerosis, arteritis, trauma, other physical factors, blood diseases caused by local cerebrovascular lesions to form blood clots blocking the cerebral blood vessels and the onset of the disease, the patient may show numbness of the hands, blurred vision and other discomforts, but also with nausea, vomiting and other symptoms. 3. Subarachnoid hemorrhage: Due to the rupture and bleeding of blood vessels on the brain surface and at the bottom of the brain, the blood flows directly into the subarachnoid cavity, which can cause subarachnoid hemorrhage, commonly caused by rupture of choroidal tumor, vascular malformation, etc. The patients with this disease often have sudden and severe headache. Patients with this disease often have sudden and severe headaches, which may also be accompanied by nausea and vomiting, hand numbness, blurred vision, confusion and other uncomfortable symptoms. It is recommended that patients with numbness of the hands and blurred vision consult a doctor promptly to assess their condition and follow the doctor’s instructions for treatment.