Irregular Astigmatism is related to keratoconus 1 and regular astigmatism. An important gene associated with Irregular Astigmatism is VSX1 (Visual System Homeobox 1), and among its related pathways/superpathways are Collagen chain trimerization and Extracellular matrix organization. Affiliated tissues include eye and endothelial, and related phenotype is vision/eye.