has part has part has_part characteristic of has modifier retina horizontal cell abnormal sensory neuron morphology abnormal retina morphology abnormal retina horizontal cell morphology abnormal horizontal cell morphology abnormal retinal horizontal cell morphology MPheno.ontology MP:0006068 any structural anomaly of the laterally interconnecting neurons in the outer plexiform layer of the retina that connect rods of one part of the retina with cones in another part of the retina morphology abnormal