A cataract is a progressive clouding or opacification of the natural lens of the eye. Usually the development of cataracts is a natural part of the aging process.

Symptoms of a Cataract:

  • Blurry vision
  • Changes in color vision, i.e.: colors appear faded or yellowed
  • Light sensitivity
  • Loss of contrast
  • Poor night vision
  • Haloes or glare around lights

Lens with a cataract

Vision with cataract

Types of Cataracts

  • Nuclear: the most common type of cataract that affects the center of the eye
  • Cortical: begins in the periphery (outer edges), and grows toward the center
  • Subcapsular: affects the back of the lens and develops rapidly

Besides aging, there are other causes of cataracts:

  • Trauma or blunt injury
  • Congenital (born with)
  • Other types of cataracts are caused by steroids, some medications and systemic diseases, such as diabetes
  • Radiation cataracts are caused by radiation treatment