title: A randomized control trial to evaluate the effect of adjuvant selective laser trabeculoplasty versus medication alone in primary open-angle glaucoma: preliminary results.
abstract: BACKGROUND
  The objective of this study was to investigate the effects of adjuvant selective laser trabeculoplasty (SLT) versus medication alone on intraocular pressure (IOP) control, medication use, and quality of life in patients with primary open-angle glaucoma.
  
  
  METHODS
  This prospective, randomized control study recruited 41 consecutive primary open-angle glaucoma subjects with medically-controlled IOP ≤21 mmHg. The SLT group (n=22) received a single 360-degree SLT treatment. The medication-only group (n=19) continued with their usual treatment regimen. In both groups, medication was titrated to maintain a target IOP defined as a 25% reduction from baseline IOP without medication, or <18 mmHg, whichever was lower. Outcomes, which were measured at baseline and at 6 months, included the Glaucoma Quality of Life-15 (GQL-15) and Comparison of Ophthalmic Medications for Tolerability (COMTOL) survey scores, IOP, and the number of antiglaucoma medicines.
  
  
  RESULTS
  The baseline IOP was 15.8±2.7 mmHg and 14.5±2.5 mmHg in the SLT and medication-only groups, respectively (P=0.04). Both groups had a comparable number of baseline medication (P=0.2), GQL-15 (P=0.3) and COMTOL scores (P=0.7). At 6 months, the SLT group had a lower IOP (P=0.03) and required fewer medications compared with both baseline (P<0.0001) and with the medication-only group (P=0.02). There was no statistically significant difference in the 6-month GQL-15 or COMTOL score as compared to baseline (P≥0.4) or between the two treatment groups (P≥0.2).
  
  
  CONCLUSIONS
  A single session of adjuvant SLT provided further reductions in IOP and medication without substantial changes in quality of life or medication tolerability at 6 months.
authors.affiliation: The Department of Ophthalmology, Caritas Medical Centre, Hong Kong ; The Department of Ophthalmology, The University of Hong Kong, Hong Kong.
authors.forename: Jacky Wy
authors.initials: JW
authors.lastname: Lee
authors.affiliation: The Department of Ophthalmology, The University of Hong Kong, Hong Kong.
authors.forename: Catherine Ws
authors.initials: CW
authors.lastname: Chan
authors.affiliation: The Department of Ophthalmology, Queen Mary Hospital, Hong Kong.
authors.forename: Mandy Om
authors.initials: MO
authors.lastname: Wong
authors.affiliation: The Department of Ophthalmology, Queen Mary Hospital, Hong Kong.
authors.forename: Jonathan Ch
authors.initials: JCh
authors.lastname: Chan
authors.affiliation: The Department of Ophthalmology, The University of Hong Kong, Hong Kong.
authors.forename: Qing
authors.initials: Q
authors.lastname: Li
authors.affiliation: The Department of Ophthalmology, The University of Hong Kong, Hong Kong.
authors.forename: Jimmy Sm
authors.initials: JS
authors.lastname: Lai
keywords: antiglaucoma medication; intraocular pressure; quality of life