The methodology is based on tracking the direction of view, which is carried out by the device "Tobii Eye Tracker 4C". A table with several pictures is displayed on the computer screen. If you hold your eyes on a separate picture, then the corresponding phrase will be sounded, for example, "drink", "turn on your side", "watch cartoons".
When a child learns letters, it will be possible to use more complex methods, such as typing the text with the eyes (see
Habr.com/post/208108 )
What will be required (in a nutshell)?
1) computer
2) light trekker - tracking device
3) free software ...