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Cataract

Summary

A cataract is a clouding of the lens in your eye. It affects your vision. Cataracts are very common in older people. By age 80, more than half of all Americans either have a cataract or have had cataract surgery.

A cataract can occur in either or both eyes. It cannot spread from one eye to the other. Common symptoms are

  • Blurry vision
  • Colors that seem faded
  • Glare - headlights, lamps or sunlight may seem too bright. You may also see a halo around lights.
  • Not being able to see well at night
  • Double vision
  • Frequent prescription changes in your eye wear

Cataracts usually develop slowly. New glasses, brighter lighting, anti-glare sunglasses or magnifying lenses can help at first. Surgery is also an option. It involves removing the cloudy lens and replacing it with an artificial lens. Wearing sunglasses and a hat with a brim to block ultraviolet sunlight may help to delay cataracts.

NIH: National Eye Institute

Start Here

  • (American Academy of Ophthalmology) Also in
  • From the National Institutes of Health (National Eye Institute) Also in
  • From the National Institutes of Health (National Institutes of Health)

Diagnosis and Tests

  • (American Association for Pediatric Ophthalmology and Strabismus) Also in
  • (American Academy of Ophthalmology)

Treatments and Therapies

Genetics

  • From the National Institutes of Health (National Library of Medicine)
  • From the National Institutes of Health (National Library of Medicine)
  • From the National Institutes of Health (National Library of Medicine)
  • From the National Institutes of Health (National Library of Medicine)
  • From the National Institutes of Health (National Library of Medicine)
  • From the National Institutes of Health (National Library of Medicine)
  • From the National Institutes of Health (National Library of Medicine)

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Videos and Tutorials

Statistics and Research

  • From the National Institutes of Health (National Eye Institute)

Clinical Trials

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Journal Articles References and abstracts from MEDLINE/PubMed (National Library of Medicine)

Reference Desk

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  • (American Foundation for the Blind)
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Seniors

  • (AGS Foundation for Health in Aging)

Patient Handouts

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