title: Outcomes after laser therapy for threshold retinopathy of prematurity.
abstract: OBJECTIVE
  To determine the anatomic outcomes of eyes treated with laser photocoagulation for threshold retinopathy of prematurity and to identify potential risk factors for unfavorable outcomes after treatment.
  
  
  METHODS
  Retrospective, noncomparative case series.
  
  
  METHODS
  Photocoagulation of the peripheral avascular retina with an argon or diode laser indirect ophthalmoscope.
  
  
  METHODS
  One hundred twenty eyes of 81 infants with threshold retinopathy of prematurity treated with laser photocoagulation from 1989 through 1997 with at least 12 months of follow-up after treatment.
  
  
  METHODS
  The principal outcome was the presence of an unfavorable anatomic outcome defined as a retinal detachment, macular fold, or retrolental tissue.
  
  
  RESULTS
  One hundred nine of 120 eyes (91%) had favorable outcomes. Eleven eyes (9%) had retinal detachments, and 1 of the 11 also had retrolental tissue. Zone 1 eyes appeared to be 3.3 times more likely to have an unfavorable outcome compared with zone 2 eyes, but the 95% confidence interval (0.8-14.5) did not support this statistically. Twenty-four of 109 eyes (22%) experienced dragging of the temporal vessels. Those with zone 1 disease were 13.7 times more likely to experience temporal dragging compared with zone 2 eyes (95% confidence interval, 3.3-57.2).
  
  
  CONCLUSIONS
  After laser photocoagulation for threshold retinopathy of prematurity, 91% of eyes had a favorable anatomic outcome. Compared with zone 2 eyes, zone 1 eyes may be more likely to have temporal dragging of the retinal vessels. Laser therapy is effective in the treatment of threshold retinopathy of prematurity.
authors.affiliation: Retina Service, Wills Eye Hospital, Philadelphia, Pennsylvania 19107, USA.
authors.forename: R
authors.initials: R
authors.lastname: Foroozan
authors.forename: B P
authors.initials: BP
authors.lastname: Connolly
authors.forename: W S
authors.initials: WS
authors.lastname: Tasman
mesh_terms: D001724:Birth Weight; D005260:Female; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D017075:Laser Coagulation; D008297:Male; D019721:Ophthalmoscopes; D011183:Postoperative Complications; D012160:Retina / Q000601:surgery; D012178:Retinopathy of Prematurity / Q000503:physiopathology / Q000601:surgery*; D012307:Risk Factors; D016896:Treatment Outcome; D014792:Visual Acuity / Q000502:physiology