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Optic Neuropathy following Botulinum Toxin Injection into the Medial Rectus Muscle for Diplopia
Mohammad Reza Khalili1, Shahla Hosseini1, Mohammad Shirvani1
1Poostchi Ophthalmology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
Purpose:
To report a case of optic neuropathy (ON) following botulinum toxin A (BTA) injection into the medial rectus muscle.
Case Report:
We describe a 37-year-old man with unilateral ON after a BTA injection into the left medial rectus for treatment of traumatic sixth nerve palsy. Oral prednisolone was prescribed for 14 days. After two weeks, his visual acuity returned to 20/20.
Conclusion:
Botulinum toxin-induced neuropathy is a rare and vision-threatening complication of BTA. In patients with recent injection of BTA who present with visual complaints, botulinum toxin-induced neuropathy should be considered.
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