ABSTRACT

Deafblindness comprises a number of heterogeneous hearing and vision disorders. These disorders can be caused by trauma, diseases, and different genetic syndromes. The two senses hearing and vision are the primary communication tools for humans; their action is complementary and they enhance each other. To be fast and reliable, communication between humans relies on vision and hearing. Since communication is derived from the Latin word “communicare,” which means to do things together, it is obvious that a loss of these two senses can be catastrophic. For example, in noisy environments where it is difficult to hear, visual input such as body language and expressions can supplement our understanding. Likewise, when vision is poor, hearing plays a major role in the localisation of sounds and detection of danger etc.