A 45-year-old patient presented with blurred vision in the left eye. Fundoscopy showed innumerable crystalline deposits tracing the path of the retinal arterioles. He had no prior history of eye disease, but he did have a history of chronic use of methoxyflurane.
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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.