Cataracts are cloudy formations in the lens of the eye. The most common cause is age-related decline in the lens, but other causes are possible. Cataracts may be caused by eye injury, diabetes, uveitis, medication side-effects (e.g. corticosteroids), certain poisons, and radiation damage to the eyes. Neonatal ...

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Introduction: Cataracts

Cataract. A cataract is a clouding of the normally clear lens that causes blurry vision. You need surgery to remove a cataract. During surgery, the ophthalmologist takes the lens out and puts in a plastic lens that is similar to ...1

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Symptoms of Cataracts

How do cataracts affect vision? Age-related cataracts can affect your vision in two ways:

  1. Clumps of protein reduce the sharpness of the image reaching the retina.

The lens consists mostly of water and protein. When the protein clumps up ...2

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Complications of Cataracts

How bad was your vision? My vision had deteriorated so badly that I was unable to legally drive, even with my glasses on. So my ophthalmologist sent me to an eye surgeon, who explained that surgery was the best—and ...3

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Causes of Cataracts

What causes cataracts? The lens lies behind the iris and the pupil. It works much like a camera lens. It focuses light onto the retina at the back of the eye, where an image is recorded. The lens also adjusts ...4

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Causes List for Cataracts

Some possible causes of Cataracts or similar disorders may include:5

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Types of Cataracts

Are there different types of cataract? Yes. Although most cataracts are related to aging, there are other types of cataract:

  1. Secondary cataract. Cataracts can form after surgery for other eye problems, such as glaucoma. Cataracts also can develop in people ...

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Diagnosis of Cataracts

How is a cataract detected? Cataract is detected through a comprehensive eye exam that includes:

  1. Visual acuity test. This eye chart test measures how well you see at various distances.
  2. Dilated eye exam. Drops are placed in your eyes to ...

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Genetics of Cataracts

Genes and genetic conditions Cataracts present from birth (congenital cataracts) are sometimes caused by a faulty gene being passed to a child from their parents. This fault means that the lens doesn't develop properly. It's estimated that there's a family history ...8

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Risk Factors for Cataracts

Who is at risk for cataract? The risk of cataract increases as you get older. Other risk factors for cataract include:

  • Certain diseases (for example, diabetes).
  • Personal behavior (smoking, alcohol use.
  • The environment (prolonged exposure to ultraviolet sunlight).

Source: NEI ...9

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Treatments: Cataracts

How is a cataract treated? The symptoms of early cataract may be improved with new eyeglasses, brighter lighting, anti-glare sunglasses, or magnifying lenses. If these measures do not help, surgery is the only effective treatment. Surgery involves removing the ...

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Prevention of Cataracts

What can I do to protect my vision? Wearing sunglasses and a hat with a brim to block ultraviolet sunlight may help to delay cataract. If you smoke, stop. Researchers also believe good nutrition can help reduce the risk of ...10

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Research for Cataracts

What research is being done? The National Eye Institute is conducting and supporting a number of studies focusing on factors associated with the development of age-related cataract. These studies include:

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Names and Terminology

Synonyms: Cataracts ; Lens opacities ; Lens opacity ...Source: GTR (NCBI/NIH)11 ...

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  1. Source: NIDDK (NIH): health-information/ diabetes/ preventing-diabetes-problems/ keep-eyes-healthy
  2. Source: NEI (NIH): health/ cataract/ cataract_facts
  3. Source: MedLinePlus Magazine (NIH): magazine/ issues/ summer14/ articles/ summer14pg6-7.html
  4. Source: NEI (NIH): health/ cataract
  5. Source: Algorithmically Generated List
  6. Source: NEI (NIH): health/ cataract/ cataract_facts
  7. ibid.
  8. Source: NHS Choices UK: conditions/ childhood-cataracts/ causes/ 
  9. Source: NEI (NIH): health/ cataract/ cataract_facts
  10. ibid.
  11. Source: GTR (NCBI/NIH): gtr/ conditions/ C1962983/ 

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Note: This site is for informational purposes only and is not medical advice. See your doctor or other qualified medical professional for all your medical needs.