Cataract 9, multiple types is a congenital form of cataract caused by mutations in the CRYAA gene and transmitted in an autosomal dominant pattern. Cataract is an opacification of the eye lens and causes visual impairment or blindness. CTRCT9 may be associated with microcornea but without other systemic anomalies. In addition to cataract of multiple types, affected patients may have microcornea, coloboma of the iris, microphthalmia, decreased visual acuity, nystagmus, strabismus and glaucoma.