Mitochondrial myopathy presenting with segmental corneal oedema and retrocorneal membrane

Chronic progressive external ophthalmoplegia (CPEO) is a genetic disorder of mitochondrial DNA characterised by progressive ocular dysmotility and eyelid ptosis. 1 Other ophthalmological manifestations of mitochondrial eye disease include optic atrophy and retinal pigmentary changes. [...]the clinical picture of segmental bilateral oedema in association with a pigmented retrocorneal membrane is unique and previously unreported in CPEO (although pigment deposition is seen with many types of endothelial dysfunction).