Ocular toxocariasis in adults.

Human infection by toxocara larvae has been thought to be predominantly a disease of young children, but the percentage of the population with antibodies to this nematode worm has recently been shown to increase with age. Although a definite diagnosis of ocular toxocariasis can be made only by identifying the larva histologically, the evidence in three cases presenting with recent uniocular loss of vision strongly suggests that adults may also be affected. The lesions noted on ophthalmoscopy closely resembled toxocaral granulomata in children. Toxocaral fluorescent antibody tests were positive in each case.