Humans suffer from an inherent disadvantage in using a computer: both hands are occupied with the keyboards and a person is unable to operate a mouse at the same time. So Sun Microsystems of California, USA, has filed several lengthy patents on a system in which the user's eye controls the text on a computer screen
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/eye-computers
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/down-earth
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/technology
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/united-states-america-us
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/computers