My name is Dima, I work in the Yandex office in St. Petersburg and I do internal services in the Toloka interface development team. This year I prepared a lecture for Schools for the development of interfaces . Below is its interpretation.
 
 
What is the availability of interfaces? For whom is it important and why should it be pursued? What are the basic techniques that make the interface accessible? In addition to these questions, the lecture clarifies the principles that underlie assistive technologies. I tried to understand the theory and a large number of practical examples, as well ...

 
 
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 ...

Accessibility in the digital environment is understood as practices for creating digital content and applications that are suitable for use by a wide range of people, including those who suffer from visual impairments, motor functions, hearing, speech, or cognitive abilities.