TY - JOUR T1 - Checking our vision: seeing 2020 JF - Canadian Family Physician JO - Can Fam Physician SP - 672 LP - 672 VL - 55 IS - 6 AU - Cal Gutkin Y1 - 2009/06/01 UR - http://www.cfp.ca/content/55/6/672.abstract N2 - ER -