Zdroje
https://www.endexclusion.sk/viac-inform%C3%A1ci%C3%AD/viac-inform%C3%A1ci%C3%AD/more-on-disability
https://edi.fmph.uniba.sk/~jaskova/IKTH/tema03/tema03.html
https://www.edi.fmph.uniba.sk/~jaskova/ped/05/tema05.htme
https://sk.wikipedia.org/wiki/Klasifik%C3%A1cia_v%C3%BDvinov%C3%BDch_por%C3%BAch_u%C4%8Denia
https://www.nrozp.sk/index.php/soc-rehabilitacia/zrakovo-postihnuti
https://www.fem.uniag.sk/fem/seminar-ki/zbornik/Skulecova.pdf
www.edi.fmph.uniba.sk/~jaskova/ped/05/tema05.htm