Types of physiological excavation of the optic nerve head.
D000293:Adolescent; D000328:Adult; D000375:Aging / Q000502:physiology*; D002648:Child; D002675:Child, Preschool; D006801:Humans; D008875:Middle Aged; D009900:Optic Nerve; D012030:Refractive Errors; D013285:Strabismus