A 28-year-old Malay woman presented with severe loss of vision in both eyes associated with periocular pain on eye movement. She was completely blind at presentation and examination showed optic discs swelling. Optic nerve imaging showed ‘doughnut sign’, characteristic of optic perineuritis. Steroid was given over six months. Visual function improved gradually and was maintained at one year follow-up. This case highlights the importance of differentiation between optic neuritis and optic perineuritis as visual recovery depends on prolonged management with corticosteroid in optic perineuritis.

A 28-year-old Malay woman presented with severe loss of vision in both eyes associated with periocular pain on eye movement. She was completely blind at presentation and examination showed optic discs swelling. Optic nerve imaging showed ‘doughnut sign’, characteristic of optic perineuritis. Steroid was given over six months. Visual function improved gradually and was maintained at one year follow-up. This case highlights the importance of differentiation between optic neuritis and optic perineuritis as visual recovery depends on prolonged management with corticosteroid in optic perineuritis.
Optic Neuritis