Notably, early onset FECD has been linked to point mutations in the collagen VIII α2-subunit chain (COL8A2) [11], while mutations in SLC4A11, responsible for the boron transporter pump [12,13,14,15,16,17,18], and trinucleotide repeat expansions in the transcription factor 4 (TCF4) region on chromosome 18 have also been implicated in late-onset FECD [4,12,18,19,20,21,22,23,24,25,26]. Here, TCF4 is linked to Fuchs endothelial corneal dystrophy.