Subretinal tracts in ophthalmomyiasis.

Three cases of presumed infestation of the human globe by the maggot of a true fly (order of Diptera) are presented. In each case, migration of the maggot through the subretinal space produced widespread ophthalmoscopic and fluorescein angiographic changes which are believed to be pathognomonic of subretinal ophthalmomyiasis. Despite extensive changes in the retinal pigmented epithelium, each of the three patients expressed few symptoms and manifested minimal visual deficit.