title: Bilateral keratoconus posticus circumscriptus: a case report.
abstract: The characteristics, clinical appearance, and frequency of the rare corneal condition, keratoconus posticus circumscriptus, are discussed. A bilateral case of this condition, examined by use of techniques not previously employed, is described.
mesh_terms: D000328:Adult; D003315:Cornea / Q000473:pathology*; D006801:Humans; D007640:Keratoconus / Q000175:diagnosis* / Q000209:etiology / Q000473:pathology; D008297:Male; D014792:Visual Acuity