What device do e-learning applications usually use to assist users with visual impairment in reading digital content?

E-learning applications commonly utilize a screen reader to assist users with visual impairments in reading digital content. A screen reader is software that interprets and vocalizes the text displayed on a computer screen or a mobile device. It reads out loud the written content, allowing users who cannot see the screen to access information, navigate websites, and interact with various applications effectively.

While voice synthesizers are involved in providing auditory output, they are typically components of screen reader software rather than standalone devices. Trackpads and graphics tablets do not specifically cater to the needs of visually impaired users for reading content; instead, they are input devices used for navigation and drawing, respectively. Therefore, the screen reader stands out as the most appropriate tool for enabling visually impaired individuals to read digital content effectively.