- Alpha-B crystallin gene (CRYAB) mutation causes dominant congenital posterior polar cataract in humans. Berry, V., Francis, P., Reddy, M.A., Collyer, D., Vithana, E., MacKay, I., Dawson, G., Carey, A.H., Moore, A., Bhattacharya, S.S., Quinlan, R.A. Am. J. Hum. Genet. (2001)