A study identifies a possible way to slow or block progression of age-related macular degeneration. The researchers implicated problems with cholesterol metabolism in this type of vision loss, perhaps helping explain the links between macular degeneration and cardiovascular disease, which both worsen with age. The new findings—identified using human plasma samples and mouse models of macular degeneration—suggest that increasing the amount of a molecule called apolipoprotein M (ApoM) in the blood fixes problems in cholesterol processing that lead to cellular damage in the eyes and other organs. In recent years, evidence has emerged that ApoM can serve as a protective...