An Unusual Ocular Manifestation of Disseminated Tuberculosis: Combined Retinal Vascular Occlusion Inducing Acute Loss of Vision.

Disseminated tuberculosis (TB) is a life-threatening disease caused by the hematogenous spread of Mycobacterium tuberculosis. Acute loss of vision as a symptom of disseminated TB is uncommon, as per the literature. Uveitis is the most common ocular manifestation of TB, and tubercular retinal arterial or venous occlusion, with or without ocular signs, has been rarely described before. We discuss the case of a 34-year-old truck driver who presented with fever, cough, and sudden painless loss of vision in the right eye. Examination revealed optic neuropathy, as well as central retinal artery and venous occlusion. Investigations showed bilateral miliary shadows on chest X-ray and multiple ring-enhancing brain lesions on MRI brain, consistent with disseminated TB. Anti-tubercular therapy led to clinical improvement. We report this case to highlight the rarity of this condition.