The ommatidium of the lacewing Chrysopa (Neuroptera).
D000221:Adaptation, Ocular; D000818:Animals; D005123:Eye / Q000033:anatomy & histology; D007313:Insecta / Q000033:anatomy & histology* / Q000502:physiology; D012160:Retina / Q000033:anatomy & histology* / Q000648:ultrastructure; D014785:Vision, Ocular