The main reason for the development of cataract is age and most people after the age of 65 will suffer from some kind of clouding of the eye.
Diabetes and prolonged use of steroids, such as cortisone, can accelerate the appearance of cataract.
An injury or a serious inflammation (uveitis) in the eye can, in some cases, lead to even a direct opacification of the affected eye.
People who are particularly exposed to ultraviolet rays, as well as lifelong smokers also run an increased risk of developing cataract.
The development of cataract during pregnancy is related to maternal diseases during pregnancy, such as syphilis and rubella, or it can be inherited (congenital cataract).