Cataract Causes

Cataracts can interfere with the passage of light on its way through the eye to the brain, and can be caused by many factors: age, environment, disease, medication or injury. An exam by an eye doctor can determine if a cataract is present.

Aging

• Cataracts occur commonly as people age. It is not fully understood why the lens changes with age, but it may be related to wear and tear or exposure to UV radiation.

Ultraviolet Radiation

• Exposure to ultraviolet radiation has been associated with cataract formation. Wearing sunglasses is recommended to cut down the risk.

Diseases

• Changes in glucose levels can cause changes in the lens of the eye, so patients with diabetes are at a higher risk of developing cataracts. Diseases like hypothyroidism may cause cataracts as well.

Medications

• Use of certain medications, such as corticosteroids or diuretics, have been shown to cause cataracts. Follow-up with an eye doctor is important when using these medications.

Congenital Cataracts

• Some people are born with either small or large opacities in the lens. These are called congenital cataracts, and may or may not impair vision. They can be inherited or be caused by an infection in the mother.

Trauma

• After an injury to the eye or after some types of surgeries, such as for glaucoma, a person may be at a higher risk of developing a cataract. These cataracts may not appear immediately.