ZEB1 and posterior polymorphous corneal dystrophy: We present the case of a patient with a rare biomicroscopic manifestation of PPCD, associated with keratoconus, in whom the mutation NM_030751.6:c.1A > C (p.Met1Leu) was detected for the first time in heterozygosity in the ZEB1 gene (OMIM #189909) (TCF8).