Endoscopic optic nerve decompression for direct traumatic optic
neuropathy: our 10 years experience
Abstract
Background: Traumatic optic neuropathy (TON) can be caused by direct or
indirect injury. Direct optic injury usually results from optic nerve
avulsion or laceration, or from direct fracture of the optic canal.
Indirect optic injury is caused by increased intracanalicular pressure
after an injury. The prognosis of direct optic injury is usually quite
poor. To date, no standardized treatment protocol has been developed for
TON. In this study we are assessing the visual improvement in patients
with direct TON who underwent endoscopic optic nerve decompression in
the last 10 years. Methods: 32 cases of optic nerve decompression for
direct TON were done in the last 10 years. Preoperative and post
operative visual assessment were done and followed up for 3 months,
Results: There was complete improvement in vision in 59% of patients
when optic nerve decompression was done within 72 hours of trauma;
whereas 31% cases had partial improvement when done between 3 and 7
days. And there was 0% improvement when done after 7 days. Conclusion:
Endoscopic optic nerve decompression is a minimally invasive effective
method in direct traumatic optic neuropathy with minimal or no
complications when done by well experienced ENT surgeon with ample
knowledge of anatomy and anatomical variations. Other important
prognostic factors include timing of surgery, extend of trauma and
preoperative visual status Key words: Endoscopic optic nerve
decompression (EOND), Nerve sheah incision/ fenestration, Traumatic
optic neuropathy (TON), Visual assessment( VA), Visual improvement scale
(VIS)