Most optic nerve gliomas are difficult to preserve vision. One of the most typical symptoms of optic nerve gliomas is vision loss, as the tumor-like proliferation of glial cells first compresses the fiber layer of the optic nerve, causing vision loss and visual field loss. Since the disease occurs mostly in children, who have poor expression ability, it does not attract much attention in the early stage of the disease, and often attracts the attention of parents only after the loss of vision, or the development of disuse strabismus, etc. By this time, the damage to the optic nerve is already very severe. By this time, the damage to the optic nerve is already very serious, and even after effective treatment, it is still difficult to preserve vision in most cases. Of course, a small number of children can be detected at an early stage and receive timely treatment, or can tolerate the slow growth of the tumor, it is possible to retain relatively good vision. Patients are advised to seek prompt medical attention and treatment as prescribed.