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Glaucoma Testing

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You might be surprised at how many tests eye doctors use to diagnose glaucoma. A proper diagnosis requires careful evaluation of many aspects of your eye’s health – from eye pressure to cornea thickness to the health of your optic nerve. This article describes how your eye doctor assesses your risk and all the tests needed to properly diagnose glaucoma.
 

Risk Factor Assessment

Your eye doctor will begin by assessing your risk level for developing glaucoma. This will help determine the frequency and extent of testing needed. Through a family history and medical questionnaire, the eye doctor is looking for the following risk factors:

  • Over the age of 60

  • Ethnic background such as African or black Caribbean descent, Hispanic, or Asian

  • Family history of glaucoma, such as a sibling or parent with glaucoma

  • History of eye conditions, injuries or surgeries

  • Prolonged corticosteroid use (eye drops, pills, inhalers or creams)

  • Chronic conditions that affect blood flow, such as migraines, diabetes, low blood
    pressure or hypertension

  • Current or former smoker
     

If you’ve already had a comprehensive eye exam, your eye doctor will also consider these risk factors:

  • Eye pressure higher than normal (above 21 mm Hg)

  • Thin corneas (less than 0.5 millimeters)
     

Your type of eyesight is also important. People with farsightedness are at a higher risk for narrow-angle glaucoma, a more serious type that can advance quickly. While nearsightedness is associated with open-angle glaucoma, which progresses slowly without any symptoms.
 

Standard Glaucoma Tests

During a comprehensive eye exam, your eye doctor will always check for glaucoma, regardless of the risk level. This provides a baseline for comparison as you age. There are two tests: tonometry and ophthalmoscopy.
 

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