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This literature review of existing electronic mobility aids for persons who are visually impaired and recent developments in this field identified and classified 146 products, systems, and devices. The 21 that are currently available that can be used without environmental adaptation are described in functional terms.

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The average level of non-use of assistive technology found in this study is less than often reported in the literature and varies between the various categories of assistive technology. Improving the quality of the assistive technology and the services, and providing assistive technology that solves the users' problem as much as possible, could enhance the use of assistive technology provided.