[Diagnosis of orbital cysticercosis -- a challenge for ophthalmologist]

Cysticercosis is a cause of serious ocular/orbital morbidity. Ocular cysticercosis can involve the anterior segment, posterior segment or adnexa. The cysticercus parasite has a predilection for subconjunctival, subretinal and intravitreal structures. Orbital involvement, in which the parasite localises within the extraocular muscle is rare. Orbital cysticercosis commonly presents with signs of inflammation, diplopia, restricted extraocular motility and proptosis. This report is of a 43-year-old woman with orbital cysticercus lying in the intraconal space, in relation with lateral rectus muscle, near to the apex of the orbit, presenting as a diplopia and painless movements of the eyeball.