MSFinals-3769

An 82-year-old woman arrives at the emergency department complaining of sudden vision loss in her right eye. She reports experiencing painless vision loss without prior symptoms two hours ago, which has not improved. The left eye has a visual acuity of 6/12 (corrected with a pinhole), while the right eye has undetectable visual acuity. Upon fundoscopic examination, prominent retinal haemorrhages are observed. What is the probable diagnosis?