TGFBI and Thiel-Behnke corneal dystrophy: Various mutations in TGFBI cause corneal opacities with different phenotypes, such as granular corneal dystrophy (GCD), lattice corneal dystrophy (LCD), Reis-Bücklers corneal dystrophy (RBCD), and Thiel-Behnke corneal dystrophy (TBCD)3.