question: Hello doctor,My sister suffered intracranial hypertension six months back and she became blind a few weeks after. A lot was done (lumbar puncture, etc.) to bring back her vision but in vain. Recently she has had VP shunt surgery and there is another plan to do optic nerve sheath fenestration. I would like to ask you whether it is recommended to do optic nerve sheath fenestration a short time after VP shunt surgery was done. Secondly, I have attached the recent visual tests (VEP and optical coherence tomography) reports so that you can help me with interpretation.