The clinical and histologic features of an intraocular parasite from a
29-year-old woman are reported. The live organism was located in the
posterior vitreous near the optic disc and was successfully removed by
vitreous aspiration. The parasite was identified as an advanced stage
larvae of Gnathostoma spinigerum. This is the first case report of th
e scanning electron microscopic findings of intraocular gnathostomiasi
s. The features of nine previously reported cases of intraocular gnath
ostomiasis are reviewed.