PCMTD1 and posterior amorphous corneal dystrophy: Additionally, we explored the potential role of two genetic markers in the pathogenesis of PACD by performing genotyping on two single nucleotide polymorphisms (SNPs): PCMTD1 (NM_001286783.1.215C>T) and COL11A1 (NM_080629.2.2386C>G) as part of a pilot investigation.