Pupil Dilation

Regular eye exams are an important way of monitoring the health of your eyes. Dilation testing is a critical part of an eye exam because it gives eye doctors a clear view of the retina, optic nerve, and blood vessels in the back of the eye.

What is a pupil dilation test?

A pupil dilation test is an eye exam that is used to evaluate the health of the retina and the light-sensitive tissue at the back of the eye. The only way to get a clear view of the back of the eye is to dilate (enlarge) the pupils. This allows more light to enter the eye without pupils constricting. After pupils have been dilated, the doctor is able to see a much greater area at the back of the eye.

Reasons for administering pupil dilation tests

Here are just a few of the diseases and conditions that can be diagnosed with the help of pupil dilation: 

  • Hypertension
  • Diabetes
  • Glaucoma
  • Macular degeneration
  • Retinal detachment
  • Cataracts
  • Infectious diseases
  • Vasculitis

During a pupil dilation test, doctors examine the optic nerve, retina, and the blood vessels in the back of your eye. Changes to the optic nerve, retina, and blood vessels from one visit to the next can be a sign of eye disease. Pupil dilation tests can also help doctors recognize early signs of other health conditions, including hypertension, diabetes, and high cholesterol.

If you are having trouble with your vision, be sure to schedule a comprehensive eye exam with an optometrist.

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