The eye tracker is a device with Infra red cameras used to detect eye movements during reading.
The system uses a small bar which is mounted below a computer screen. The bar incorporates IR cameras which detect the position of the eyes to within less than 1 degree.
A wide range of test stimuli can then be presented on the screen and following a quick calibration, the system records the position of each eye at approximately 60 measurements per second.
The software replays exactly where the patient was looking and shows the horizontal and vertical position of the eyes and convergence/phoria. Powerful built-in analysis algorithms automatically provide a range of statistics relating to reading performance.
It shows the position of the eyes in relation to each other, and to the text, and conclusions can be drawn as to the reading speed, efficiency and other factors for example, such as how much time eyes fixate on a word, which impacts on processing time, and so on.
If the eyes are not working in a coordinated manner, then all sorts of learning and processing issues arise.
This may add to the burden of other developmental delays/variations or problems which may already exist, thus making the learning experience really tough.