An atypical case of unilateral vision loss in thyroid eye disease

Abstract

Optic neuropathy is a rare and severe complication of thyroid eye disease (TED), comprising four to eight per cent of all the complications that may manifest due to compression of the optic nerve by hypertrophy of the extraocular muscles, inflammation or compromised blood supply to the optic nerve.1 Dysthyroid optic neuropathy appears later in the progression of TED and is rarely the presenting feature. Herein is presented a case of 60-year-old female who initially presented with acute painless unilateral diminution of vision, later diagnosed with TED and compressive optic neuropathy. The signs of TED were found to be subtle in this patient. However, careful clinical examination led to the appropriate diagnosis