Price survey. IOL price locks prove farsighted.
D003625:Data Collection; D017754:Group Purchasing / Q000191:economics; D017721:Hospital Costs / Q000639:trends*; D006801:Humans; D007910:Lenses, Intraocular / Q000191:economics*; D011682:Purchasing, Hospital / Q000191:economics*; D014481:United States