Which is not a cause for Hamarlopia?
Peripheral coical cataract causes Nyctalopia. Central vitreous opacity, Congenital deficiency of cones and Central nuclear or polar cataracts can cause Hamarlopia (Day blindness). Ref: A K Khurana, 2nd Edition, Page 11.
Polar cataract
Congenital deficiency of cones
Peripheral coical cataract
Central corneal opacity