MRCP2-2964

A 28-year-old patient presented with a 3-day history of gradual decline in her visual acuity and loss of colour vision. She reported no ocular pain. Two months ago, she was diagnosed with pulmonary tuberculosis and HIV. She was currently on quadruple anti-tuberculous therapy and antiretroviral therapy.

During examination, bilateral fundoscopy showed no abnormalities.

Investigations:
s
CD4 count at diagnosis 180 × 106/l 430 – 1690 × 106/l
CD4 count at presentation 320 × 106/l 430 – 1690 × 106/l

What is the most probable diagnosis?