This document provides an overview of ocular parasites, including Toxocara canis, Cysticercus cellulosae, Gnathostoma spinigerum, and Histoplasma capsulatum. It discusses the organisms, clinical presentations, diagnosis, and treatment of each parasite. Key points include that Toxocara canis causes ocular inflammation and granulomas, Cysticercus cellulosae causes cysts in eye tissues leading to uveitis, and Gnathostoma spinigerum and Histoplasma capsulatum can spread from the lungs to the eyes and cause vision changes. Diagnosis involves clinical examination, imaging, and serology testing, while treatment consists of ant