Glossary

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Deafblind(also: Deaf-Blind, Deafblindness, Dual Sensory Loss)

A condition involving combined hearing and vision loss that significantly affects communication, access to information, and mobility. Deafblindness is not simply the sum of deafness and blindness — it creates unique challenges that require distinct support strategies, including…

Deafblindness(also: Deaf-Blindness, Dual Sensory Impairment, Combined Vision and Hearing Loss)

Deafblindness is a combined vision and hearing impairment that creates unique challenges beyond those associated with either sensory loss alone. It is not simply the sum of deafness and blindness — the combination creates distinct communication, information access, and mobility…

Finger Braille(also: Tactile Finger Spelling)

A communication method used primarily by deaf-blind people, in which a sender taps or presses on the fingers of the receiver to represent Braille dot patterns, simulating typing on a Braille typewriter. The receiver's six fingers (three on each hand) correspond to the six dots…

Protactile Language(also: Pro-Tactile, PT)

A fully touch-based language developed by the DeafBlind community that redefines communication through physical contact, including taps, squeezes, and shared contact space. Protactile Language represents a striking example of a communication micro-culture, where a community…

Tadoma(also: Tadoma Method)

A tactile method of communication used by individuals who are deafblind, in which the receiver places their hand on the speaker's face — thumb lightly on the lips and fingers along the jawline and cheek — to feel the movements of speech including lip movements, vibrations, and…

Usher Syndrome(also: Usher's Syndrome)

A genetic condition that is the most common cause of combined deafness and blindness (deafblindness). It is characterized by sensorineural hearing loss present from birth and progressive vision loss from retinitis pigmentosa, which typically begins in adolescence or young…

Vibrotactile Feedback(also: Vibrotactile, Vibrotactile Display, Tactile Vibration)

A form of haptic feedback that uses vibration patterns to convey information through the sense of touch. In accessibility, vibrotactile feedback provides an alternative or complement to visual and auditory output channels, enabling communication with users who are blind, deaf,…

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