Ocular toxocariasis in humans is caused by infection with larvae of Toxocara species, which are common ascarid roundworms of mammals, kept in close proximity to human. Four cases with a history of contact with dogs and cats and blurred vision and visual impairment over periods of variable duration were examined. We screened patients diagnosed with ocular larva migrans syndrome between March and June 2021 at the Ophthalmology clinics affiliated with Alborz University of Medical Sciences, Karaj, Iran. Detailed demographics, clinical characteristics, and fundus photography were recorded. Anti-Toxocara antibodies in the sera and vitreous fluid detected by ELIZA. Complete recovery in all four patients was achieved following treatment with oral albendazole. The diagnosis of ocular toxocariasis can be challenging, because both the condition is relatively uncommon and its presentation varies from patient to patient. There are lots of differential diagnoses like retinoblastoma, therefore correct, quick diagnosis, and treatment is very important.