What causes juvenile cataracts or macular degeneration?

Juvenile cataracts. Congenital cataract: during pregnancy, mom has infection (ie measles/rubella (the most common cause), rubeola, chicken pox, cytomegalovirus, herpes simplex, herpes zoster, poliomyelitis, influenza, Epstein-Barr virus, syphilis, toxoplasmosis. Juvenile: include, prior trauma, infection, inflammation, JRA. Macular degener: gene mutation-> Stargardt's disease, Best disease, and juvenile retinoschisis.