The diagnosis of congenital unilateral third-nerve palsy.

Sixteen cases of congenital unilateral third-nerve palsies collected from the records of the Wilmer Eye Institute and The Johns Hopkins Hospital over twenty-one years are reviewed. Their aetiology, clinical features, differential diagnosis and prognosis are discussed. Their benign nature with respect to absence of associated neurological disease and the high probability of their causing amblyopia and aberrant regeneration are emphasized.