HealthTask

=Health questions (20 marks):=

Computer manufacturers are including features in the design of hardware and software to assist persons with impaired vision or blindness. Blind users can also make use of voice synthesis systems in order to access information. Sometimes, these systems are less than completely successful. (a) Identify two ways in which a computer’s operating system can be used to assist users with impaired vision. [2 marks] (b) Many blind people can read text that is written in Braille, which is a system of raised dots that represent characters. Describe how software and hardware can be used to provide Braille output from a text document. [4 marks] (c) Explain the precautions that all computer users can take in order to avoid eye problems. [4 marks] (d) Discuss reasons why voice synthesisers may not always provide effective help for their users. [10 marks]