[1] Princess Alexandra Eye Hosp, Edinburgh, Midlothian, Scotland
[2] Heriot Watt Univ, Sch Built Environm, VisionCtr3, OPENspace, Edinburgh, Midlothian, Scotland
[3] Univ Edinburgh, Dept Psychol, Ctr Cognit Ageing & Cognit Epidemiol, Edinburgh, Midlothian, Scotland
[4] Univ Edinburgh, Dept Clin Sci, Edinburgh, Midlothian, Scotland