The 2009 Eyeglasses and Eye Care Services Index.
D005139:Eyeglasses / Q000191:economics*; D006077:Government Agencies; D017048:Health Care Costs / Q000639:trends*; D006801:Humans; D007250:Inflation, Economic; D009907:Optometry / Q000191:economics*; D014481:United States; D014786:Vision Disorders / Q000534:rehabilitation*