title: Same-Day Bilateral Glaucoma Laser Treatments in Ontario: 2000 to 2013.
abstract: OBJECTIVE
  To analyze trends in bilateral, same-day laser iridotomies, and trabeculoplasties in Ontario over the last decade.
  
  
  METHODS
  Ontario Health Insurance Plan billing service claims between 2000 and 2013 were analyzed for the yearly number of glaucoma laser procedures. The annual number of Ontarians with primary open-angle glaucoma (POAG) was estimated by applying composite prevalence curves to published population data and the yearly number of procedures per 1000 Ontarians with POAG was calculated.
  
  
  RESULTS
  The volume of same-day bilateral trabeculoplasties increased from 15.3 per 1000 with POAG in 2000 to 74.7 in 2013 (4.9-fold). The proportion that were same-day bilateral procedures increased from 22.7% in 2000 to 40.2% in 2004 (76.9% increase) and remained stable from 2009 to 2013, reaching 38.5% in 2013. The number of same-day bilateral laser iridotomies increased from 3126 in 2000 to 11,716 in 2013 (3.75-fold). The proportion of iridotomies that were bilateral increased from 39% in 2000 to 54.6% in 2006 (40% increase) and remained stable from 2006 to 2013, reaching 56.7% in 2013.
  
  
  CONCLUSIONS
  The increase in same-day bilateral trabeculoplasties coincided with the introduction of selective laser trabeculoplasty. The proportion of this practice remained constant for the last 3 years of the study period. In 2013, 56.7% of iridotomies and 38.5% of trabeculoplasties were performed as same-day bilateral procedures. We recommend comparison studies between same-day and sequential laser therapies to assess complication rates and patient satisfaction to provide an evidence-based treatment approach, as there are limited data to support this practice.
authors.affiliation: *Faculty of Medicine †Department of Ophthalmology and Vision Sciences ‡Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada.
authors.forename: Andrei-Alexandru
authors.initials: AA
authors.lastname: Szigiato
authors.forename: Graham E
authors.initials: GE
authors.lastname: Trope
authors.forename: Yaping
authors.initials: Y
authors.lastname: Jin
authors.forename: Yvonne M
authors.initials: YM
authors.lastname: Buys
mesh_terms: D005902:Glaucoma, Open-Angle / Q000453:epidemiology / Q000503:physiopathology / Q000601:surgery*; D006801:Humans; D007429:Intraocular Pressure; D032801:Iridectomy / Q000706:statistics & numerical data / Q000639:trends*; D007498:Iris / Q000601:surgery*; D053685:Laser Therapy; D009864:Ontario / Q000453:epidemiology; D009885:Ophthalmology / Q000706:statistics & numerical data / Q000639:trends*; D010818:Practice Patterns, Physicians' / Q000639:trends*; D015995:Prevalence; D012189:Retrospective Studies; D014130:Trabeculectomy / Q000706:statistics & numerical data / Q000639:trends*