A Curious Case of Occlusive Retinal Vasculitis in a Young Individual Associated with COVID-19 Vaccination.

A 23-year-old man presented with the blurring of vision in the left eye for 4 days. Best-corrected visual acuity was 6/6 N6 in both eyes. Examination revealed an unremarkable right eye while the left eye showed occlusive retinal vasculitis with no retinitis, choroiditis, or macular involvement. Fundus fluorescein angiography confirmed the same. History revealed the patient had received 2nd dose of Covishield vaccination 4 weeks before the onset of symptoms. Blood investigations were negative for infectious or any systemic autoimmune disease. Serum homocysteine and serum CMV IgG levels were grossly increased while tests for antiphospholipid syndrome were weakly positive. He responded well to a combination of intravitreal and oral antivirals, oral steroids for vasculitis and tablets Clopilet and Homin. This case is extremely intriguing in terms of the involvement of the adenoviral vector vaccine either as a causative factor or being just a coincidental finding.