The ADAMTS18 gene plays an essential role in embryonic eye development and biallelic variants have been linked to MMCAT syndrome (microcornea, myopic chorioretinal atrophy, telecanthus) microcornea and rod–cone dystrophy, early childhood cataracts and/or ectopia lentis and retinal dystrophy without anterior segment features [28]. The gene discussed is ADAMTS18; the disease is Microcornea.