1. Corn, A., Erin, J.: Foundations of low vision: Clinical and functional perspectives. 2nd edn. APH Press (2010)
2. Pascolini, D., Mariotti, S.: Global estimates of visual impairment: 2010. Br. J. Ophthalmol. 96, 614–618 (2011)
3. Wang, W., Yan, W., Müller, A., Keel, S., He, M.: Association of socioeconomics with prevalence of visual impairment and blindness. JAMA Ophthalmology. 135, 1295 (2017)
4. Sachdeva, N., Suomi, R.: Assistive Technology for Totally Blind―Barriers to Adoption. In: Bratteteig, T., Anaestad, M., Skorve, E. (ed.) IRIS36. Akademika forlag pp. 182–198. (2013)
5. Bhatt, A., Kumari, A.: Assistive technology for the visually impaired children for their academic excellence. Glob. J. Med. Case Rep. (2015)