Diffuse unilateral subacute neuroretinitis. An 11-year-old boy presented with decreased vision in the right eye. Examination findings included moderate vitritis and a relative afferent pupillary defect in addition to multiple chorioretinal lesions and submacular fibrosis. A worm was not found, and the patient was treated with albendazole. A, Once vitreous inflammation had decreased, multifocal areas of chorioretinal scarring in the periphery as well as submacular fibrosis were visible. B, In the inferotemporal periphery, a worm was identified. C, With higher magnification, the small grayish worm (arrow) was visible. D, Laser spots were applied directly to the worm. The patient’s vision subjectively improved, and no further lesions or inflammation was seen.