– Commonly due to old age-(Senile cataract).
– Misuse of steroid tablet or steroid eye drops (steroid induced cataract) – Due to injury with blunt or sharp objects (traumatic cataract)
– Infection to the mother at the time of pregnancy leading on to cataract to the new born (congenital cataract)
– Eye infections caused by bacteria causing tuberculosis, leprosy etc., and other eye infections causing uveitis leads on to a cataract called complicated cataract.
– Other conditions like night blindness, detachment of the retina also can cause complicated cataract.