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Health A-Z

Medical Content Created by the Faculty of the
Harvard Medical School

Symptoms

Cataracts typically do not cause any symptoms until they have grown large enough to interfere significantly with vision. Once symptoms of cataracts develop, they can include:

  • Cloudy or blurry vision

  • Double vision (diplopia)

  • Colors appear faded

  • Seeing halos around lights

  • Increased sensitivity to glare

Diagnosis

Your doctor will suspect cataracts based on your age, medical history, and symptoms. Your doctor can diagnose cataracts by widening (dilating) your pupil with medication and examining your eye. You also will have a visual acuity test, which uses an eye chart to check the effect of the cataract on your vision.

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From Health A-Z, Harvard Health Publications. Copyright 2007 by the President and Fellows of Harvard College. All rights reserved. Written permission is required to reproduce, in any manner, in whole or in part, the material contained herein. To make a reprint request, contact Harvard Health Publications. Used with permission of StayWell.

You can find more great health information on the Harvard Health Publications website.


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