The natural lens is clear n transparent helps light rays clearly focus on the retina to give clear ,sharp image.
Clouding or opacification of lens is called Cataract. Old age n some other factors affects translucency of lens n causes blurred vision progressing to blindness of affected eye.
Complicated cataract - pediatric cataract
-Post Lasik / refractive surgery
Causes of Cataract
Most forms of cataract develop in adult life. The normal process of ageing causes the lens to harden and become cloudy. This is called age-related cataract and it is the most common type. It can occur at any time after the age of 40.
Although most cataracts are age related, there are other types, including congenital (present at birth), drug induced (steroids), and traumatic (injury to the eye). Cataract is also more common in people who have certain diseases such as diabetes.