Optic nerve sheath fenestration

• It is a surgical procedure in which slits are made in the optic nerve sheath to relieve the pressure on the optic nerve
• It is done in cases of Idiopathic Intracranial Hypertension (pseudo tumor cerebri)

Procedure:

• The orbit is entered into via a surgical incision in the skin
• The eyeball is pushed to one side and the optic nerve is identified
• Slits are made in the optic nerve sheath
• The fluid drains out and the compression on the optic nerve is relieved

Uses:

• Preservation of optic nerve function in cases of idiopathic intracranial hypertension not responding to medical therapy