Cynthia L. Ingraham and Jean F. Andrews
British Journal of Visual Impairment 2010 28: 130
DOI: 10.1177/0264619609359416
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For example, if a student with limited vision and hearing is unable to completely hear a particular vocabulary word, the use of their vision to see the printed word or the manual sign can be useful.
The earlier the onset of deafblindness, the more challenging it is for the student to develop communication and literacy skills (Cummings-Reid,
2007; Miles and Riggio, 1999). However, persons who are born deaf and lose their vision later in life may face obstacles depending on how much American Sign Language (ASL) and English skills they have already acquired (Reid, 1996). When deafblind persons lose their vision, as in the case of a student with Usher Syndrome (a combination of congenital deafness and progressive vision loss caused by Retinitis
Pigmentosa), they often learn to read braille (Ingraham and Anderson,
2001). Further, etiologies associated with deafblindness may also cause reading disabilities, dysgraphia, and learning disabilities in general
(Miles and Riggio, 1999: 15).