How can people who have low vision operate a computer?
For some people with visual impairments the standard size of letters on the screen or printed in documents are too small for them to read. Some people cannot distinguish one color from another. Fortunately, specialized hardware and software can make computer systems usable by individuals with visual impairments.
Input
Most individuals who have visual impairments can use standard keyboards, but large-print keytop labels are sometimes useful, particularly when they are learning to type.