Abstract
Purpose: We present a case of bilateral compressive optic neuropathy secondary to orbital myositis after COVID-19 messenger ribonucleic acid (mRNA) vaccination.Case summary: A 51-year-old man developed acute bilateral visual loss and painful ophthalmoplegia shortly after receiving the second dose of the BNT162b2 COVID-19 mRNA vaccine (Comirnaty, Pfizer®, New York, NY, USA). His best-corrected visual acuity was counting fingers at 30 cm and 50 cm in the right and left eyes, respectively. Bilateral eyelid swelling, erythema, conjunctival injection, and color vision deficit were observed. Orbital magnetic resonance imaging revealed diffuse enhancement and hypertrophy of the bilateral extraocular muscles. The patient had no significant ophthalmic history and systemic work-up revealed no evidence of underlying inflammatory disease. Based on the clinical presentation and imaging findings, he was tentatively diagnosed with bilateral compressive optic neuropathy secondary to orbital myositis after COVID-19 mRNA vaccination. He was treated with intravenous corticosteroids for 3 days followed by low-dose oral corticosteroids. One month later, his visual acuity and color vision improved; moreover, the inflammatory signs in the eyelids, conjunctiva, and extraocular muscles resolved. However, after developing COVID-19, he experienced a recurrence of symptoms and was retreated with corticosteroids. Radiotherapy was administered to address persistent color vision deficit in the right eye and recurrent eyelid edema, erythema, and conjunctival injection. This treatment effectively resolved all inflammatory signs and color vision deficits, without signs of recurrence.Conclusions: Acute fulminant orbital myositis with associated compressive optic neuropathy can manifest after COVID-19 mRNA vaccination and onset of COVID-19. Anti-inflammatory treatment measures can effectively control these manifestations.
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