<prompt> All of the following are cause of posterior subcapsular cataract except -Myotonic dystrophyWilsons DiseaseIonizing radiationCongenital cataract  <response>: Causes of posterior subcapsular cataract: Myotoic dystrophy DM Downs syndrome Busulfan, Chloroquine Ionizing radiation Senile cataract Wilsons disease Atopic dermatitis Coicosteroids Trauma Galactosemia Infrared Ref: Parsons 22nde p.270 21ste p.258, 260; Khurana 7the p.189 4the p.177 