“…A wide range of assistive technology devices are used for this purpose, e.g.:. screen magnifiers, which are used by people with low vision to enlarge and change colours on the screen to improve the visual readability of rendered text and images;Abu-Doush et al (2013),Andronico et al (2006),Atinmo (2007),Bayer and Pappas (2006),Beverley et al (2011), Brazier (2007,Burrington (2007),Byerley and Chambers (2003),Carey (2007),Chapman (2007),Craven (2001),Cylke et al (2007),Davies (2007),Evett and Brown (2005),Davis (2003),Fernandes et al (2012),Guercio et al (2011), Harper et al (2005, Hunsucker (2013),Johnson (2000),Kouroupetroglou et al (2007),…”