Blindness caused by tumor compressing the optic nerve for half a year is usually difficult to recover, and surgery can be chosen to relieve the compression to prevent further deterioration of the condition. Blindness caused by compression of optic nerve by intracranial tumor is usually due to the compression of optic nerve by the tumor, which leads to edema of optic nerve papilla, and prolonged failure to relieve the compression will lead to atrophy of optic nerve, which will affect the vision. If the tumor compresses the optic nerve and causes blindness for half a year, it is likely that optic nerve atrophy has already occurred. At this time, relieving the tumor compression cannot restore vision, but it can prevent the tumor from further enlarging and compressing other normal brain nerves. The discovery of intracranial tumor, especially when the tumor has caused obvious clinical symptoms, such as visual vision abnormalities, hearing abnormalities, etc., should be treated in time, to avoid the tumor progression of more serious damage to the patient.