<prompt> The commonest type of cataract isBlue dotZonularCupuliformCuneiform  <response>: You must be thinking, why not a blue dot?Carefully read the question. Here the question is about the commonest type of cataract not congenital cataract.A most common type of cataract is senile cataract Age-related cataract.A most common type of senile cataract is cuneiform cataract 70.In general, the predominant form can be given as cuneiform 70, nuclear 25, and cupuliform 5. Anatomy Physiology of eyeCortical senile Cuneiform cataract is the most common form of senile cataract prevalent in aging population. 