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Continued ultrastructural aging after d-gal treatment. At 20 wk, control RPE–choroid appears unaffected (Upper Left); d-gal-treated RPE–choroid (Upper Right) shows basal laminar deposit (arrows) and prominent outer collagenous layer deposit (*s). (Lower Left) A prominent basal laminar deposit (arrows) adjacent to an intercapillary region (*). (Upper Right) Lipid-like membranous vacuoles within the RPE. (Scale bar, 1 μm.)
