cataract 42 (Monarch Disease Ontology identifier MONDO_0007283) is any early-onset non-syndromic cataract in which the cause of the disease is a mutation in the CRYBA2 gene. Also known as: A cataract that has_material_basis_in heterozygous mutation in the CRYBA2 gene on chromosome 2q35., CRYBA2 early-onset non-syndromic cataract, CTRCT42, cataract type 42, early-onset non-syndromic cataract caused by mutation in CRYBA2.