Thiel–Behnke corneal dystrophy (TBCD), otherwise known as honeycomb corneal dystrophy, is a bilateral autosomal dominant Bowman’s layer dystrophy caused by a heterozygous missense mutation of the BIGH3 (also known as TGFBI) gene [27,28]. The gene discussed is TGFBI; the disease is Thiel-Behnke corneal dystrophy.