The King-Devick Test is used worldwide as a proven indicator of eye movement function using Rapid Number Naming.

Since 2011, there have been over 140 peer-reviewed studies recently published in elite medical journals validating King-Devick technologies products as quick, objective measures of saccadic dysfunction indicating suboptimal brain function in: concussion, migraine, multiple sclerosis, Parkinson’s disease, hypoxia, extreme sleep deprivation, Alzheimer’s disease and other conditions as well as effective intervention solutions for reading disabilities and post traumatic brain injury recovery.

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