In Vivo Technique for Autofluorescent Lipopigments

Lipofuscin—a generic term applied to autofluorescent lipopigment—is a mixture of protein and lipid that accumulates in most aging cells, particularly those involved in high lipid turnover (e.g., the adrenal medula) or phagocytosis of other cell types (e g., the retinal pigment epithelium or RPE; macrophage).