Bill is joined by professor emeritus in optometry and vision science at the University of Waterloo and editor in chief of the Canadian Journal of Optometry, Dr. Ralph Chou, to talk about how much brighter LED headlights are than incandescent and the dangers they pose.

<p>Bill is joined by professor emeritus in optometry and vision science at the University of Waterloo and editor in chief of the Canadian Journal of Optometry, Dr. Ralph Chou, to talk about how much brighter LED headlights are than incandescent and the dangers they pose.</p>