Figure 1. Left, Fundus photograph of the right eye of a 34-year-old man following daily ingestion of the artificial tanning agent, canthaxanthine. The inner retina exhibited numerous 30-µm-diameter crystalline deposits in a bilateral ringlike distribution. The remainder of the macula, retinal arteries, retinal veins, and the optic nerve were unremarkable. Right, Magnified view of the temporal macula.