An Economic Analysis of Switching to Latanoprost from a Beta-Blocker or adding Brimonidine or Latanoprost to a Beta-Blocker in Open-Angle Glaucoma or Ocular HypertensionByWilliam C. Stewart, MD,Jessica Leech, BS,Elizabeth D. Sharpe, MD,John Kulze, MD,John Ellyn, MD,Douglas G. Day, MDAugust 1st 2002