A cataract is a clouding of the normally clear lens of your eye. For people who have cataracts, seeing through cloudy lenses is a bit like looking through a frosty or fogged-up window. Clouded vision caused by cataracts can make it more difficult to read, drive a car (especially at night) or see the expression on a friend's face.

Most cataracts develop slowly and don't disturb your eyesight early on. But with time, cataracts will eventually interfere with your vision.

At first, stronger lighting and eyeglasses can help you deal with cataracts. But if impaired vision interferes with your usual activities, you might need cataract surgery. Fortunately, cataract surgery is generally a safe, effective procedure.

Aug. 31, 2016
  1. Jacobs DS. Cataract in adults. http://www.uptodate.com/home. Accessed May 19, 2016.
  2. Cataract. American Optometric Association. http://www.aoa.org/patients-and-public/eye-and-vision-problems/glossary-of-eye-and-vision-conditions/cataract?sso=y. Accessed May 19, 2016.
  3. Facts about cataract. National Eye Institute. https://nei.nih.gov/health/cataract/cataract_facts. Accessed May 19, 2016.
  4. Longo DL, et al., eds. Disorders of the eye. In: Harrison's Principles of Internal Medicine. 19th ed. New York, N.Y.: McGraw-Hill Education; 2015. http://accessmedicine.com. Accessed May 19, 2016.
  5. Riordan-Eva P, et al. Lens. In: Vaughan & Asbury's General Ophthalmology. 18th ed. New York, N.Y.: The McGraw-Hill Companies; 2011. http://www.accessmedicine.com. Accessed May 19, 2016.
  6. Who is at risk for cataracts? American Academy of Ophthalmology. http://www.aao.org/eye-health/diseases/cataracts-risk. Accessed May 19, 2016.
  7. Cui YH, et al. Association of blood antioxidants and vitamins with risk of age-related cataract: a meta-analysis of observational studies. The American Journal of Clinical Nutrition. 2013;98:778.