ocular toxocariasis in a young man

purpose: to present a case of ocular toxocariasis in a young male subject from the north of iran. case report: a 29-year-old man presented to our clinic with history of decreased vision in his left eye from 10 days before. he had a history of similar symptoms 2 years ago. visual acuity in the left eye was counting fingers at 2 meters but relative afferent pupillary defect was negative. the right eye was normal on examination but the left eye showed mild anterior chamber reaction together with +3 to +4 cell in the anterior vitreous. funduscopy in left eye disclosed posterior vitreous organization in the superonasal area of the retina. serologic test study for toxocariasis was strongly positive. conclusion: ocular toxocariasis is a rare but severe cause of unilateral visual loss in young healthy persons