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Case Study:
How EyeTech and
Edmund Optics are Helping Those with Disabilities Regain their Independence

The future depends on novel and advanced sensory technology, such as eye tracking, to allow those with physical or neurological disabilities to better communicate, operate a motorized chair, and take back control of their lives.

Eye Tracking: Enabling Mobility
and Improving the Quality of Life

Robert Chappell uses his voice to type and his eyes to move his computer mouse. After having sustained severe strain injuries to both his arms and hands, preventing his use of a conventional mouse and keyboard, Robert developed the first Windows-based, eye-controlled computer mouse for his own personal use. Two decades later, EyeTech, with Robert as founding Chief Technology Officer, has been developing commercial algorithms, hardware, and software for eye tracking. Today, EyeTech has been helped, and continues to help, over 10,000 global users in regaining their independence.

After recognizing the need for small form-factor, high quality imaging lenses for their eye trackers, EyeTech sought out M12 Imaging Lenses, or S-Mount Lenses, from Edmund Optics® (EO). Through several EyeTech product releases, EO has been able to provide high performance M12 Lenses from their large selection of off-the shelf components which fit EyeTech’s design specifications and requirements.  

"Now, over 10,000 users across the world rely on EyeTech eye trackers to communicate, control their environment and their favorite PC apps with their eye movements to regain their independence."
- Keith Jackson; Director of Sales & Marketing

Empowering those with Disabilities

One of EyeTech’s most revolutionary applications uses their eye tracking technology to improve the quality of life and enable mobility and independence for those with physical or neurological disabilities. The Centers for Disease Control and Prevention (CDC) reported in 2016 that about 16.1% of adults in the United States have at least one form of physical functioning difficulty.1 The National Spinal Cord Injury Statistical Center also reports that there are approximately 11,000 new cases of spinal cord injuries (SCI), injuries that result in paraplegia and tetraplegia, annually.2 These statistics more than present the necessity for methods of mobility outside of normal convention. Windows 10 currently features a version of EyeTech’s eye tracking software in the settings menu under Ease of Access which is called Eye Control and can be enabled with the appropriate eye tracking hardware. Furthermore, EyeTech has developed a standalone product, with the help of the line of Zynq processors from Xilinx hardware, which can be used by those who are impaired to move their motorized chairs and communicate.  

Diagnosing Traumatic Brain Injuries

EyeTech also licenses its software to several groups and companies which integrate eye tracking technology into non-EyeTech hardware systems, for a number of other exciting industries. Using EyeTech technology to perform the King Devick Test (K-D), organizations like the Canadian Football League, National Hockey League, and Major League Soccer have been able to analyze their athletes for suspected traumatic brain injuries (TBI)—the most common injury being concussions—simply by observing how players’ eye movements deviate from pre-established normal behavior (Figure 1).

Figure 1: By tracking a user’s eye movements the King-Devick test which provides a pattern for the eye to navigate, can be used to detect head or brain injury.

More than 50 percent of the human cortex is used to process visual information and eye tracking is now being used to help provide insights into the brain in a fast and non-invasive way.3 Athletes, however, are certainly not the only people who will inevitably suffer from head injuries. The CDC reported that approximately 1.7 million people sustained a traumatic brain injury (TBI) each year between the years 2002 and 2006 and that a TBI is a contributing factor to about one third of all injury-related deaths in the US. 4 In addition to detecting concussions, it has been shown that eye tracking is able to very accurately diagnose other neurological conditions. Groups from Arizona State and Boston University have even used this technology to assess the signs of Parkinson’s disease and Alzheimer’s disease as well. 5, 6

EyeTech’s eye tracking technology may also be found in a wide range of other applications including iris identification, testing website usability, integration into devices such as smart phones, tablets, televisions, kiosks, and virtual/augmented reality headsets, and analyzing Super Bowl Commercials.  

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Partnering with Edmund Optics

EyeTech utilized off the shelf components from EO for their eye tracking hardware to shorten their lead times and reduce costs. EO offers over 34,000 unique optical components with >96% same day order fulfilment, allowing customers like EyeTech to get the components they need as fast as possible. When no off-the-shelf product meets a customer’s specific needs, modifications can be made to any stock optical component in 2-3 weeks and fully custom optics can be built to their exact specifications. To learn more about EyeTech hardware and software, or their approach to eye tracking and the implications eye tracking may have in your application, visit their website.  


  1. Summary Health Statistics: National Health Interview Survey, 2016, Table A-6, U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, National Center for Injury Prevention and Control, 2016.
  2. Gorgey, Ashraf, and David Gater. "Prevalence of Obesity After Spinal Cord Injury." Topics in Spinal Cord Injury Rehabilitation, vol. 12, no. 4, 2007, pp. 1–7., doi:10.1310/sci1204-1.
  3. Hagen, Susan. "The Mind's Eye." Rochester Review, vol. 74, no. 4, 2012.
  4. Traumatic Brain Injury in the United States, U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, National Center for Injury Prevention and Control, 2016.
  5. Hayley Ringle. "Scottsdale Eyes ASU Spinoff Tech to Detect Alzheimer's, Cerebral Palsy and Other Diseases.", The Business Journals, 11 Feb. 2015,
  6. Wu, C C, et al. "Eye Movement Control during Visual Pursuit in Parkinson's Disease." Current Neurology and Neuroscience Reports., U.S. National Library of Medicine, 22 Aug. 2018,
The Future Depends on Optics