A 45 year-old patient presented with blurred vision in the left eye.
He had no prior history of eye disease. Fundoscopy showed innumerable crystalline deposits tracing the path of the retinal arterioles.
Answer: Deposits like these can be cholesterol, other lipids, or organic calcium salts. In this case, the deposits are believed to be calcium oxalate caused by chronic use of methoxyflurane, a general anesthetic with analgesic properties.
View this and similar cases on Figure 1.