A minimal estimate is that there are 1.5 million visually impaired computer users, including those who are blind. Blindness Most individuals who are blind use standard keyboards, however Braille input devices are available. Braille key labels assist with keyboard use. Voice output can be used to read screen text to blind computer users. The availability of earphones for individuals using voice output systems can reduce the distractions for others nearby.
Braille printers provide output for blind users.
Scanners with optical character recognition can read printed material and store it electronically on computers, where it can be read using voice synthesis or printed using Braille translation software and Braille printers. Such systems provide independent access to journals, syllabi, and homework assignments for blind students. Low Vision Most individuals who have visual impairments can use standard keyboards, but large print keytop labels are sometimes useful. Special equipment for individuals who are visually impaired can modify display or printer output. Computer-generated symbols, both text and graphics, can be enlarged on the monitor or printer, thereby allowing individuals with low vision to use standard word processing, spreadsheet, electronic mail, and other software applications.