Deafblindness

{{Short description|Condition of little or no useful sight and little or no useful hearing}}

Deafblindness is the condition of little or no useful hearing and little or no useful sight.{{Cite book |last=Keller |first=Helen |url=https://archive.org/details/helenkellersjour00hele |title=Helen Keller's Journal, 1936-1937 |publisher=Doubleday, Doran & Co |year=1938 |location=Garden City, NY}}{{Cite journal |last1=Kudlick |first1=Catherine |last2=Nielsen |first2=Kim E. |author-link2=Kim E. Nielsen |year=2005 |title=Review of the Radical Lives of Helen Keller |journal=Journal of American History |series=4 |volume=91 |issue=4 |page=1533 |doi=10.2307/3660309 |jstor=3660309}} Different degrees of vision loss and auditory loss occur within each individual.{{Cite journal |last=Dammeyer |first=Jesper |date=November 2014 |title=Deafblindness: a review of the literature |journal=Scandinavian Journal of Public Health |volume=42 |issue=7 |pages=554–562 |doi=10.1177/1403494814544399 |issn=1651-1905 |pmid=25114064 |s2cid=23967371}} 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.{{Cite web |last=Deaf-Blindness |first=NCDB: National Center on |title=Overview on Deaf-Blindness |url=https://nationaldb.org/library/page/1934 |access-date=2018-03-27 |website=nationaldb.org |language=en}} Laura Bridgman was the first American deafblind person known to become well educated. Helen Keller was a well-known example of an educated deafblind individual.{{Cite web |title=NCDB Selected Topics: Deaf-Blindness Overview |url=http://nationaldb.org/ISSelectedTopics.php?topicCatID=15 |access-date=2012-03-04 |publisher=Nationaldb.org |archive-date=2012-03-14 |archive-url=https://web.archive.org/web/20120314141701/http://nationaldb.org/ISSelectedTopics.php?topicCatID=15 |url-status=dead }} 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.

The deafblind community has its own culture, comparable to those of the Deaf community. Members of the deafblind community have diverse backgrounds but are united by similar experiences and a shared, homogeneous understanding of what it means to be deafblind.{{Cite web |last=Deaf-Blindness |first=NCDB: National Center on |title=Culture and Community |url=https://nationaldb.org/library/page/2154 |access-date=2018-03-27 |website=nationaldb.org |language=en |archive-date=2018-03-28 |archive-url=https://web.archive.org/web/20180328103044/https://nationaldb.org/library/page/2154 |url-status=dead }} Some deafblind individuals view their condition as a part of their identity.{{Cite web |title=Identity – DeafBlind Connection – Minnesota State Academies |url=https://www.msa.state.mn.us/apps/pages/index.jsp?uREC_ID=572985&type=d&pREC_ID=966579 |url-status=dead |archive-url=https://web.archive.org/web/20180328103221/https://www.msa.state.mn.us/apps/pages/index.jsp?uREC_ID=572985&type=d&pREC_ID=966579 |archive-date=2018-03-28 |access-date=2018-03-27 |website=www.msa.state.mn.us |language=en}}

Epidemiology

{{Prose|date=March 2018}}

The medical condition of deafblindness occurs in different forms. For some, this condition might happen congenitally from birth as a result of genetic defect, for others it happens suddenly due to a form of illness or accident that results in a modality deprivation of either vision or hearing, or both.{{Cite news|url=https://www.deafblindinformation.org.au/about-deafblindness/causes/conditions-syndromes/|title=Conditions/Syndromes {{!}} Deafblind Information|work=Deafblindness Support Services|access-date=2018-03-27|language=en-US}} A person might be born deaf and become blind at a later stage in life, or vice versa. In any given case of deafblindness, many possible onsets and causes of this condition exist; some happen gradually, others happen unexpectedly and suddenly.{{Cite web|url=https://www.nhs.uk/conditions/deafblindness/causes/|title=Causes|website=nhs.uk|language=en-GB|access-date=2018-03-27}} The diagnosis of deafblindness could be medically classified into specific types based on one's symptoms and causes.

The two overarching types of deafblindness are congenital and acquired.{{Cite book|url=http://documents.nationaldb.org/products/etiologies2001.pdf|title=Etiologies and Characteristics of Deaf-Blindness|last1=Heller|first1=Kathryn|last2=Kennedy|first2=Cheryl|publisher=National Center on Deaf-Blindness}}{{rp|36–74}}

Congenital deafblindness: the condition of deafblindness from birth

Acquired deafblindness: condition of deafblindness developed later in life

  • Genetic conditions (evident at a later stage in life){{rp|37–49}}
  • Usher syndrome
  • Alport syndrome
  • Age-related loss of modality (vision or auditory or both){{Cite web|url=https://www.helenkeller.org/hknc/common-causes-0|title=HKNC: Common Causes of Combined Vision and Hearing Loss|website=www.helenkeller.org|language=en-US|access-date=2018-03-27}}
  • Illness, such as meningitis
  • Somatic injuries{{rp|68–74}}
  • Brain damage/trauma
  • Stroke
  • Permanent physical damage (relating to vision or hearing)

Communication

Deafblind people communicate in many different ways as determined by the nature of their condition, the age of onset, and what resources are available to them. For example, someone who grew up deaf and experienced vision loss later in life is likely to use a sign language (in a visually modified or tactile form). Others who grew up blind and later became deaf are more likely to use a tactile mode of spoken/written language. Methods of communication include:

Multisensory methods have been used to help deafblind people enhance their communication skills. These can be taught to very young children with developmental delays (to help with pre-intentional communication), young people with learning difficulties, and older people, including those with dementia. One such process is Tacpac.

Deafblind people often use the assistance of people known as support-service providers (SSPs), who help the deafblind with tasks such as routine errands, guiding the deafblind through unfamiliar environments, and facilitating communication between the deafblind person and another person.{{cite web|title=What is a SSP?|url=https://www.helenkeller.org/hks/what-ssp|publisher=Helen Keller National Center|access-date=4 May 2021}}

Technology

A graphic Braille display can be used in sensing graphic data such as maps, images, and text data that require multiline display capabilities such spreadsheets and equations. Graphic braille displays available in the market are DV-2 (from KGS{{cite news|url=http://www.kgs-jpn.co.jp/ | title=Home of KGS Corporation|publisher=KGS Corporation}}), Hyperbraille,{{cite news|url=http://www.hyperbraille.de/?lang=en | title=Hyperbraille|publisher=Hyperbraille}} and TACTISPLAY Table/Walk (from Tactisplay Corp.{{cite news|url=http://www.tactisplay.com/ | title=Home of Tactisplay Corp.|publisher=Tactisplay Corp.}}). For example, TACTISPLAY Table{{cite news|url=http://www.tactisplay.com/product/tactisplay-table | title=Full Page Braille Display being Launched by Tactisplay Corp.|publisher=Tactisplay Corp.}} can show 120*100 resolution refreshable braille graphics on one page.{{Cite web|url=https://www.youtube.com/watch?v=olm3BwNbMq4 |archive-url=https://ghostarchive.org/varchive/youtube/20211212/olm3BwNbMq4| archive-date=2021-12-12 |url-status=live|title=This video shows operation of the device.|website=YouTube |access-date=Sep 10, 2020}}{{cbignore}}

See also

References

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