has part has part has_part characteristic of has modifier abnormal retina pigment epithelium morphology retina pigment epithelium atrophy acquired diminution of the size of the epithelial layer of the retina composed of cells containing pigment granules, associated with wasting as from death and reabsorption of cells, diminished cellular proliferation, decreased cellular volume, pressure, ischemia, malnutrition, reduced function or malfunction, or hormonal changes atrophy of retinal pigment epithelium MPheno.ontology MP:0005548 retinal pigment epithelium atrophy abnormal atrophied pigmented layer of retina