title: One-year outcomes after photodynamic therapy in patients with age-related macular degeneration with poor baseline visual acuity.
abstract: BACKGROUND
  Photodynamic therapy with verteporfin (PDT) has been demonstrated in randomized controlled trials to be a safe and effective therapy for choroidal neovascular membranes (CNV) secondary to age-related macular degeneration (AMD). Limited information is available on the prognosis with PDT for patients who fell outside the inclusion criteria for the clinical trials, however. The purpose of this study is to describe the clinical course of patients with CNV lesions in AMD treated with PDT, with baseline visual acuities sufficiently poor to warrant exclusion from previous randomized trials.
  
  
  METHODS
  Retrospective case series. Ten consecutive patients with CNV secondary to exudative AMD treated with PDT with baseline visual acuity less than 34 ETDRS letters were followed for 1 year. The main outcome was median change in visual acuity on the ETDRS chart.
  
  
  RESULTS
  The median change in acuity over 12 months was + 13 letters. All patients lost <3 lines of ETDRS acuity, and eight of ten patients (80%) gained at least one line of vision, over 12 months.
  
  
  CONCLUSIONS
  In our series, patients with low visual acuity at baseline appeared to respond to PDT on both visual acuity and fluorescein angiographic measurements. PDT treatment may be considered for selected patients with these baseline characteristics.
authors.affiliation: Department of Ophthalmology and Visual Sciences, University of British Columbia, Vancouver, British Columbia, Canada. mpotter@interchange.ubc.ca
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Potter
authors.forename: Shelagh M
authors.initials: SM
authors.lastname: Szabo
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D020256:Choroidal Neovascularization / Q000188:drug therapy* / Q000209:etiology; D005260:Female; D006801:Humans; D008268:Macular Degeneration / Q000150:complications / Q000188:drug therapy*; D008297:Male; D008875:Middle Aged; D010778:Photochemotherapy; D017319:Photosensitizing Agents / Q000627:therapeutic use*; D011166:Porphyrins / Q000627:therapeutic use*; D012189:Retrospective Studies; D016896:Treatment Outcome; D000077362:Verteporfin; D014792:Visual Acuity / Q000187:drug effects*
chemical_list: D017319:Photosensitizing Agents; D011166:Porphyrins; D000077362:Verteporfin