Deaf-blind American author, activist, and lecturer Helen Keller in 1904. Keller lost both her sight and hearing to meningitis at the age of 19 months.<unk>  is the condition of little or no useful hearing and little or no useful sight. Different degrees of vision loss and auditory loss occur within each individual, thus making the deafblind community unique with many types of<unk>  involved. Because of this inherent diversity, each deafblind individual's needs regarding lifestyle, communication, education, and work need to be addressed based on their degree of dual-modality deprivation, to improve their ability to live independently. In 1994, an estimated 35,000–40,000 United States residents were medically deafblind. Helen Keller was a well-known example of a deafblind individual. To further her lifelong mission to help the deafblind community to expand its horizons and gain opportunities, the Helen Keller National Center for Deaf-Blind Youths and Adults (also called the Helen Keller National Center or HKNC), with a residential training program in Sands Point, New York, was established in 1967 by an act of Congress. Furthermore, the deafblind community has its own culture, creating a community of<unk>  similar to the deaf community and the blind community. Each community is made up of a group of individuals who have undergone similar experiences and have a homogeneous understanding of what it means to be deafblind, even with a large diversity of unique backgrounds. Some deafblind individuals view their condition as a part of their identity.
Deafblindness
Cortical deafness
Amblyopia
Buphthalmos
Cerebral polyopia
Amblyaudia
Entomopia
Childhood blindness