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There are certain symptoms of CI that are hard to observe from the outside. People with CI have probably experienced all or some of these:

  • Double vision when reading, especially for long periods of time


  • Eyes feel tired, hurt, sore, or uncomfortable

  • A “pulling” feeling around eyes

  • Words move, jump, swim, or appear to float on the page

  • Words appear to come in and out of focus

  • Words overlap or blur on the page, sometimes creating a 'halo effect'


People with CI often have problems with tracking across the page, and their eyes may jump around between different words and lines while reading: