Figure 3. Slit-lamp photomicrographs of a patient with posterior polymorphous corneal dystrophy 3 (PPCD3) secondary to p.(Gln884Argfs*37) mutation in the zinc finger E-box binding homeobox 1 gene (ZEB1). Diffusely distributed geographic gray-white Descemet membrane opacities are seen on direct illumination (A) that appear as round and oval-shaped “vesicles” on retroillumination, consistent with posterior polymorphous corneal dystrophy (PPCD).