Eye gaze technology can give children with the most severe motor impairments a way to communicate, learn, and engage with the world. This article explains how eye gaze works, who is a good candidate, what evaluation and setup look like, what devices are available, and how families build eye gaze use into daily life.
How Eye Gaze Works
Eye gaze systems use a camera bar (typically mounted below or beside a screen) to track the position and movement of the user’s eyes. Infrared light illuminates the eyes invisibly, and the camera captures the reflection pattern. Software interprets where the user is looking on screen. To make a selection, the user fixates (dwells) on a target for a set time (often 1 to 3 seconds), or blinks, or another switch is activated. The system can be calibrated for individual users and adjusted for head position, glasses, lighting, and dwell preferences. Modern eye-gaze systems are surprisingly accurate even with imperfect head control or strabismus.
Who Is a Good Candidate
Eye gaze is most often used for children with severe quadriplegic CP who cannot reliably control their hands, arms, or feet for AAC access. Specific candidates include children with:
- Severe spasticity, dystonia, or athetosis limiting limb control
- Adequate visual acuity (corrected vision is acceptable)
- Cognitive ability to understand cause and effect
- Stable head position or appropriate seating support
- Family commitment to setup, training, and modeling
Children with cortical visual impairment (CVI), severe nystagmus, or major eye movement disorders may need adaptation or alternatives. The eye gaze evaluation assesses these factors directly.
Eye gaze devices and the years of therapy that go with them are expensive. A free legal review can help clarify whether your child’s CP was preventable and what funding options exist.
The Evaluation
Eye gaze evaluations are typically conducted by AAC-specialty SLPs, often in partnership with assistive technology professionals. The evaluation includes:
- Vision and ocular movement assessment
- Cognitive and language assessment
- Trial of one or two eye-gaze systems
- Calibration and dwell time testing
- Seating and positioning evaluation
- Family routines and goals discussion
- Recommendations for device, vocabulary, and training plan
Many children require multiple evaluation sessions to develop reliable eye-gaze access, especially if they have not had prior AAC exposure.
Devices and Software
Major eye-gaze options include:
- Tobii Dynavox: PCEye external eye tracker that attaches to a tablet or laptop, or integrated devices like the I-Series. Software includes Communicator and Snap Core First.
- Smartbox: Grid Pad devices with integrated eye tracking, running Grid 3 software.
- EyeTech and other smaller manufacturers offer eye trackers compatible with various AAC software.
The choice depends on the child’s specific needs, the SLP’s familiarity with the software, and insurance coverage. Vocabulary systems like LAMP, Snap Core First, and Grid 3 each have different layouts and learning curves.
Setup at Home
Successful eye-gaze use at home depends on:
- Stable mounting: a sturdy floor stand, wheelchair mount, or adjustable arm that holds the device at the right height and angle.
- Lighting control: avoid bright window glare on the screen; consistent lighting helps calibration.
- Seating and positioning: the child needs comfortable, stable head and trunk position to use eye gaze reliably.
- Aided language input: adults using the device themselves to model communication.
- Patience: most children need weeks to months of consistent use to develop fluent eye-gaze communication.
OT and SLP partnership is helpful in setting up the home environment, especially around mounting and seating.
Funding and Practical Considerations
Eye-gaze devices are expensive (,000 to ,000 or more for fully equipped systems). Insurance and Medicaid commonly cover them when documented as medically necessary. The funding process is similar to standard AAC: SLP evaluation, letter of medical necessity, prior authorization, manufacturer-supported funding team. School districts often provide eye-gaze devices for educational use through the IEP. Some manufacturers offer loaner programs for trial use before purchase. Connecting with families already using eye gaze (through Tobii Dynavox community forums, AAC parent groups) provides invaluable practical guidance.
Starting Eye Gaze for Your Child
Steps to evaluate and implement.
How long until my child uses eye gaze fluently?
Highly variable. Some children make selections within hours; many take weeks to months of consistent exposure to develop reliable access. Initial use often involves cause-and-effect activities (looking to play music, reveal pictures) before progressing to symbol-based communication. Patience and consistent modeling are essential.
Can my child use eye gaze if they have CVI?
Sometimes, with adaptation. CVI affects how the brain processes visual information. Children with mild to moderate CVI may use eye gaze with high-contrast, low-clutter screens and slower transitions. Children with severe CVI may need alternative access methods (single switches, partner-assisted scanning). The evaluation team can advise.
We help families across 38 states understand insurance, Medicaid, and school-district funding for eye gaze and AAC.
Related reading for parents
- AAC devices for non-verbal children with CP: how to get started
- The role of technology in enhancing communication for non-verbal individuals with CP
- Cortical visual impairment (CVI): what it looks like and how to support your child
- Utilizing assistive technology for environmental control at home
- IDEA and your rights: getting early intervention and school services
Our team helps families in 38 states understand the full clinical picture and what services should be in place. No cost. Answers first.
