Doctors can't figure out what's wrong. severe headaches lasting 3weeks and blindness in left eye. been to er (spinaltap, mri, ct scan) what's going on?

Neurologist: It sounds like the er has checked to make certain this wasn't some acute problem like an aneurysm or a bleed. You may need further detailed work-up by a neurologist to try to figure this out. This may be more complicated and there may be additional special tests that need to be done. A neuro-opthalmologist might also be helpful to examine the eye findings in detail.