title: Influence of selective laser trabeculoplasty on 24-hour diurnal intraocular pressure fluctuation in primary open-angle glaucoma: a pilot study.
abstract: OBJECTIVE
  To investigate the influence of selective laser trabeculoplasty on mean diurnal intraocular pressure (IOP) and diurnal IOP fluctuation in primary open-angle glaucoma.
  
  
  METHODS
  After washout from intraocular pressure-lowering drugs, a baseline diurnal IOP curve was obtained for 26 eyes of 13 patients before selective laser trabeculoplasty. The IOP curve was repeated at 3 and 6 months.
  
  
  RESULTS
  In five eyes, office time (8:00 a.m. to 12:00 p.m.) IOP decreased by 20% or more. No similar decrease was seen in mean diurnal IOP in any case. IOP-lowering drugs were required for 11 eyes before the 3-month visit. Baseline diurnal IOP was higher for these eyes than for the others (P = .002). Compared with baseline values, a significant decrease was seen in mean IOP at the 6-month visit (P = .017) and in IOP fluctuation at both visits (P < .001 and P = .004, respectively) for the eyes without drug treatment.
  
  
  CONCLUSIONS
  Although no eyes showed mean diurnal IOP reduction of 20% or more, selective laser trabeculoplasty resulted in a significant decrease in the amplitude of diurnal IOP fluctuation.
authors.affiliation: Department of Ophthalmology, Semmelweis University, Budapest, Hungary.
authors.forename: Péter
authors.initials: P
authors.lastname: Kóthy
authors.forename: Márta
authors.initials: M
authors.lastname: Tóth
authors.forename: Gábor
authors.initials: G
authors.lastname: Holló
mesh_terms: D000368:Aged; D002940:Circadian Rhythm / Q000502:physiology*; D017558:Elective Surgical Procedures / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D005902:Glaucoma, Open-Angle / Q000503:physiopathology / Q000601:surgery*; D006801:Humans; D007429:Intraocular Pressure / Q000502:physiology*; D053685:Laser Therapy / Q000379:methods*; D008297:Male; D010865:Pilot Projects; D011184:Postoperative Period; D012189:Retrospective Studies; D014130:Trabeculectomy / Q000379:methods*; D016896:Treatment Outcome