Keratoconus Conical cornea HP:0000563 A cone-shaped deformity of the cornea characterized by the presence of corneal distortion secondary to thinning of the apex. Keratoconus is an entity characterid by several phenotypic findings such as corneal distortion (secondary to thinning of the apex) and either Fleischer's ring or Vogt's striae. This HPO term intends to denote the finding of corneal distortion and bulge. UMLS:C0022578 Bulging cornea SNOMEDCT_US:65636009 Decreased corneal thickness Increased corneal curvature