Types of Cataract
Cataract is classified into three different types, depending upon the part of the lens affected.
Nuclear cataract: It is the most common cataract seen. This cataract forms in the nucleus, the center of the lens, and is due to natural aging changes and is usually visible.
Cortical cataract: It forms in the cortex of the lens, beginning with whitish streaks that extend to the front of the lens. These cataracts are commonly seen in diabetic patients.
Subcapsular cataract: This begins at the back of the lens. People with diabetes, high farsightedness, or those taking high doses of steroids may develop a sub-capsular cataract.
A study in 2007 showed the cumulative incidence of nuclear cataract was 29.7%; cortical cataract, 22.9%; posterior sub capsular cataract (PSC), 8.4%.1
Age-related cataracts are the most common type. Other less common types of cataracts like are:
Secondary cataract: Cataracts can occur after some of the eye surgery, such as glaucoma. They are sometimes even linked to steroid use.
Traumatic cataract: Cataracts can develop after an eye injury, some years later.
Congenital cataract: Some babies are born with cataracts or develop them in childhood, often in both eyes.
Radiation cataract: Cataracts can develop after exposure to some types of radiation.
Next page: Treatment for cataract
Written by: Healthplus24 team
Date last modified: April 27, 2012