Figure 2. Family B. A: Pedigree of this family with an atypical lattice corneal dystrophy. B: Slit-lamp examination revealed bilateral map geographic-like opacities in the sub-epithelium with lattice lines (arrowhead) within the corneal stroma in the 41-year-old man (IV.4). C: Electropherograms of exon 11 of TGFBI gene. The proband IV.4, showing a heterozygous thymine to guanine change at codon 509 (c.1526T>G, p.Leu509Arg).