Effects of orbital decompression by endoscopic endonasal in dysthoid optic neuropathy
Main Article Content
Abstract
This is a prospective study aimed to assess the efficacy of endoscopic orbital decompression in patients of dysthoid optic neuropathy (DON). From January 2018 to January 2020, the study enrolled 9 patients with DON who underwent endoscopic orbital decompression and analyzed 14 orbits. Surgical technique used included removal of medial wall and medial part of inferior wall of the orbit and slitting of the orbital periosteum. The results showed an average reduction in exophthamos of 2.1 ± 1.03 (1 – 3) mm following endoscopic orbital decompression. The visual acuity was significantly improved in 9 of 14 eyes, with no case reported worse visual acuity. The medium visual acuity improvement was equal to 4 Snellen lines. There was no complication of cerebral fluid leakage, lacrimal duct impairment, sinusitis or orbital contamination. New onset diplopia appeared in 5 patients, of whom three patients self-improved in 3 months and the other two patients required strabismus surgery. Better postoperative visual acuity was significantly correlated with better preoperative visual acuity (r = 0.713, p = 0.014) and with normal optic disc (r = 0.705, p = 0.023), but not with age, exophthalmometry and MD value in visual field test. In conclusion, endoscopic orbital decompression provides an effective and safe treatment for dysthoid optic neuropathy.
Article Details
Keywords
Endoscopic orbital decompression, dysthoid optic neuropathy.
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