Deafblind people have a combined sight and hearing impairment which causes difficulties with communication, access to information and mobility. Deafblindness is also sometimes known as dual sensory impairment, dual sensory loss or multi-sensory impairment. Deafblind people may not be totally deaf and totally blind. There are about 23,000 deafblind people in the UK. Some are totally deaf and totally blind, while many others have some hearing and/or vision.

A loss of hearing, occurring prior to the acquisition of spoken language accompanied by visual impairment of 20/70 in the better eye corrected or a visual field of 20 degrees or less. The individual will be unable to understand speech through auditory means, even with a hearing aid.

Term applied to those who have a degree of both vision loss and hearing loss.