![]() ![]() ![]() Skills that need to be developed include a sense of egocentric localization, shape discrimination, size constancy, object distance, and motor coordination with the body, including hands and feet. Basic visual skills, obvious and intuitive for those with sight, must be relearned or newly learned with AVDs. The need for guided practice over a protracted period must be understood by patients and clinicians alike. Obtaining functional visual percepts with current artificial vision technologies is not intuitive. Nevertheless, the states of ultra-low vision provided by AVDs do allow for some functional improvements in object detection and mobility tasks ( Benav et al., 2010 Chebat et al., 2011 Nau, Bach, & Fisher, 2013 Nau, Pintar, Fisher, Jeong, & Jeong, 2014 Zrenner et al., 2011). In the case of sensory substitution technologies, the stimulus evokes visual qualia in most participants, but the response is decidedly nonvisual ( Cattaneo, Vecchi, Monegato, Pece, Cornoldi, 2007 Ortiz et al., 2011). The visual percepts conferred by existing AVDs do not resemble normal vision, however, because the sensations they provide are devoid of color, depth, and detailed form. Other strategies for restoring vision, such as visual cortical implants and ocular regeneration, are being pursued at the basic research level ( Crapo et al., 2012 Dobelle, 2000 Fernández et al., 2005 Koizumi, Okumara, & Kinoshita, 2012 Ueda, Mizuno, & Araki, 2012). (2013) reported that 54% of blind participants who had the Argus II retinal prosthesis (Second Sight Medical Products, Sylmar, CA) implanted were successful in performing a motion detection task. Retinal implant technology and sensory substitution devices have been shown to provide people who are blind with the ability to interpret their environment ( Alteheld, Roessler, & Walter, 2007 Benav et al., 2010 Chader, Weiland, & Humayun, 2009 Chebat, Schneider, Kupers, & Ptito, 2011 Hub, Hartter, Kombrink, & Ertl, 2008 Johnson & Higgins, 2006 Merabet et al., 2009 Mokwa et al., 2008 Ptito, Moesgaard, Gjedde, & Kupers, 2005 Renier & De Volder, 2010 Sachs & Gabel, 2004 Striem-Amit, Guendelman, & Amedi, 2012 Zrenner et al., 2011). Providing a limited sense of sight to people who are blind is no longer a science fiction fantasy but is now a possible reality with the use of artificial vision devices (AVDs). As artificial vision technologies become available, occupational therapy practitioners can play a key role in clients’ success or failure in using these devices. Without training, participants were not able to perform above chance level using the BrainPort device. After participation in the 1-wk training protocol, participants were able to use the BrainPort device to complete the two tasks with moderate success.ĬONCLUSION. At baseline, participants were unable to complete the two functional assessments. The functional outcomes of object identification and word recognition were tested at baseline and after rehabilitation training. Eighteen adults ages 28–69 yr ( n = 10 men and n = 8 women) who had light perception only or worse vision bilaterally spent up to 6 hr per day for 1 wk undergoing structured rehabilitation interventions. We sought to determine whether intensive low vision rehabilitation would confer any functional improvement in a sample of blind adults using the BrainPort artificial vision device. ![]()
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