circumscribed posterior keratoconus

circumscribed posterior keratoconus

congenital corneal defect characterized by a craterlike defect on the posterior corneal surface.

cir·cum·scribed pos·te·ri·or ker·a·toc·o·nus

(sĭr'kŭm-skrībd pos-tēr'ē-ŏr ker'ă-tō-kō'nŭs)
Congenital corneal defect characterized by a craterlike defect on the posterior corneal surface.