The manner in which the eyes scan during a reading-related task may be an indicator of Alzheimer’s disease. This was demonstrated in a recent study in the Alzheimer’s Disease and Associated Disorders Journal using a test called the King-Devick.

The King-Devick Test was initially developed as tool to help determine reading problems in children related to how the eyes scanned the page. It was a flip book with a series of reading cards that tested horizontal saccadic eye movement that was comparable to a reading pattern.

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