1. Department of Kinesiology and Physical Education, BA 521, Wilfrid Laurier University, 75 University Avenue West, Waterloo, ON, Canada, N2L 3C5
2. Department of Health Studies and Gerontology, University of Waterloo, 200 University Avenue West, Waterloo, ON, Canada, N2L 3G1, and director, Homewood Research Institute, Guelph, ON, Canada
3. Department of Health Studies and Gerontology, University of Waterloo
4. Centre for Sight Enhancement and School of Optometry, University of Waterloo
5. St. Mary's General Hospital, 911 Queen's Boulevard, Kitchener. ON, N2M 1B2, Canada
6. Family and Community Resources, Region of Waterloo Public Health, 99 Regina Street South, Waterloo, Ontario, N2J 4V3, Canada
7. Ontario Institute for Studies in Education, Department of Human Development and Applied Psychology, University of Toronto, 252 Bloor Street West, Toronto, ON, Canada, M5S 1V6