Images of Memorable Cases: Case 7 Optic fundus of an asymptomatic 70-year-old diabetic woman. 7. Calcific retinal emboli (arrows) These emboli are stark-white, obstruct arteries in or near the optic disk, do not move, and often cause permanent visual impairment. This patient had a calcified mitral annulus, the presumed source of her calcific emboli.