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A description of cataracts: what they are, how they form, and what can be done to alleviate them.

A description of cataracts: what they are, how they form, and what can be done to alleviate them.



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    Cataracts Cataracts Presentation Transcript

    • Cataracts An overview
    • What is a cataract
      • Clouding of the lens
      • Most are related to aging
      • By 80, more than half Americans have a cataract or have had surgery for it.
      • Can occur in one or both eyes
      • Cannot spread from eye to eye
    • Lens
      • Clear part of eye
      • Focuses light or image on retina
      • Retina is light sensitive tissue at back of eye
      • A cloudy lens produces an blurred image
    • Other types of cataracts
      • Secondary (can form after surgery, or with other health problems)
      • Traumatic (develop after injury)
      • Congenital (can occur at birth)
      • Radiation cataract (after exposure to radiation)
    • How does it look with cataracts?
    • What causes cataracts? http://www.nei.nih.gov/
      • Lens: Works like camera lens. Focuses light on retina, where image recorded. Also adjusts focus, letting us see close and far. Lens made up of protein and water.
      • With aging, protein may clump together and start to cloud.
      • Researchers believe smoking/diabetes MAY contribute, or it can be wear and tear.
    • How it affects vision?
      • Clumps of protein reduce sharpness of image
      • Clear lens may change to yellowish/brownish color
    • Who is at risk for cataracts?
      • Diseases such as diabetes
      • Previous eye injury or surgery
      • Prolonged use of corticosteriods
      • Behavior such as smoking & alcohol
      • Environment such as prolonged exposure to sun
    • How can I protect my eyes?
      • Wear sunglasses and a brimmed hat
      • Stop smoking
      • Nutrition (eat green leafy vegetables, fruit, etc.)
      • Comprehensive dilated eye exam at least once/every 2 years.
      • Early treatment may save your sight.
    • Symptoms & Detection
      • Cloudy, blurred vision
      • Faded colors
      • Glare from headlights/lamps
      • Poor night vision
      • Double vision
      • Frequent prescription changes
    • How is it detected?
      • Visual acuity test (Eye test for distances)
      • Dilated eye exam
      • Tonometry (instrument to measure pressure in eye)
    • How is it treated?
      • Can be improved with new eyeglasses, brighter lighting, anti glare sunglasses or magnifying glasses
      • Surgery (remove cloudy lens and replace with artificial lens)
      • Cataract surgery will include only one eye at a time, is one of the safest and most effective types of surgery.
    • What research is being done?
      • Effect of sunlight exposure (may be related)
      • Vitamin supplements which may slow progression
      • Genetic studies, to better understand cataract development
    • Interactive eye
      • Click on link below for an interactive look at the eye
      • http://www.nei.nih.gov/health/eyediagram/
    • More information
      • Tutorial on cataracts from Medline Plus:
      • http://www.nlm.nih.gov/medlineplus/tutorials/cataracts/htm/_yes_50_no_0.htm
    • Resources National Eye Institute http://www.nei.nih.gov/about/