I had a schwannoma tumor growing from my optic nerve. It took 2 craniotomies to remove…but that's only because the first neurologist diagnosed the tumor wrong..he thought it was a meningioma tumor. The result of the first craniotomy was not removing the tumor and loss of peripheral vision and double vision for about 1 month afterwards. I was then sent to another neurologist who diagnosed it as a schwannoma tumor. The second craniotomy resulted in removal of the tumor, however, there was some damage done. I can no longer use my left eye. Also, the brain tumor was pushing against the pituitary gland and damaged it causing me to get diabetes insipidus ( water diabetes) They also found an orbital mass…they are continuing to watch it with yearly mri's. It's been a struggle…I really miss driving. But I am very thankful I am not completely blind.