4. A secondary cataract
It is a type of cataract that is caused by other well-known diseases or exposure. The most common cause of secondary cataracts is diabetes mellitus. It is found that cataract is a common finding in more than 50% of patients who had diabetes for a long period exceeding 10 years.
Steroid intake for a long period is believed to increase the risk of secondary cataracts. Not only do systemic steroid in oral pills or intravenous solution increases the probability of cataract development.
Cataracts could also develop secondary to longstanding hypertension. Secondary cataracts could even occur after cataract surgery as the posterior capsule in which the new lens is placed could be opacified.
