Features of Ocular Infestation by Toxocara.

IN Britain, ocular involvement by Toxocara was first recognized by Ashton (1960), who reported four -qses of granulomatous lesions of the retina due to this ascarid nematode, common in dogs and cats. Stimulated by these revelations, attention has since been focused on this aspect of ophthalmology and it appears that some ocular lesions caused by Toxocara have in the past been attributed mistakenly to other causes such as organized haemorrhage or exudate, Coats's disease, and choroiditis. In Ashton's series, all four eyes had been enucleated because the fundus lesions appeared similar to those of retinoblastoma, and not until after the completion of histological examination was the correct diagnosis established. 28 cases of ocular infestation by Toxocara have now been examined at the Institute of Ophthalmology, London: