Do you know TOMMY, the album by The Who?
It is a concept album based on the story of a boy born at the end of World War I, who became deaf, blind and mute.
The Emotiv EPOC is a high resolution, neuro-signal acquisition and processing wireless neuroheadset. It uses a set of sensors to tune into electric signals produced by the brain to detect player thoughts, feelings and expressions and connects wirelessly to most PCs.
It is not difficult to find out what is Usher Syndrome. Just type in the name on a search engine and thousands of pages that explain what this disease will be displayed.