Operative treatment was employed in 19 cases of intraocular cysticercosis: 6 subretinal (3 in the macular region) and 13 intravitreal (3 mobile, 10 fixed). The essential diagnostic sign is the appearance of the parasitic vesicle (iridescent tint, movements of the wall and the scolex), but difficulties may arise because of severe intraocular lesions : vitreous clouding, chorioretinitis, detachment of the retina. The site of the vesicle must be determined before and during operation. Fixed cysticerci require that the globe be opened by a well-placed incision. If they are mobile, they can be aspirated through the pars plana with the erysiphake or a trocar, depending on the size of the vesicles. Aspiration is also necessary when there is total detachment of the retina of a fixed intravitreal vesicle, after freeing adhesions. Successful results were obtained in 15 of the 19 cases treated.