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Selective laser trabeculoplasty: predictive value of early intraocular pressure measurements for success at 3 months
  1. P B Johnson1,
  2. L J Katz1,
  3. D J Rhee2
  1. 1William and Anna Goldberg Glaucoma Service; Wills Eye Hospital, Philadelphia, PA, USA
  2. 2Massachusetts Eye and Ear Infirmary, Boston, MA, USA
  1. Correspondence to: Douglas J Rhee MD, Massachusetts Eye and Ear Infirmary, 243 Charles Street, Boston, MA 02114, USA; dougrhee{at}aol.com

Abstract

Aim: To determine the predictive value of the 2 week post-selective laser trabeculoplasty (SLT) intraocular pressure (IOP) by comparing it to the 4 week and 3 month values.

Methods: A retrospective chart review of eyes that underwent SLT between 2001 and 2004 was performed. The primary outcome measure was IOP. Demographic and medical data were collected for correlational analysis.

Results: 132 eyes of 95 patients were identified, none was excluded. Of the eyes that exhibited a decrease in IOP of >1 mm Hg at 2 weeks postoperatively, 99.24% continued to show a lowered IOP at the 4 week and 3 month visits. For these patients, the Pearson’s r value between 2 weeks and 4 weeks was 0.708 (p value = 0.01) while the r value between 2 weeks and 3 months was 0.513 (p value = 0.01).

Conclusions: The 2 week visit post-SLT predicted the 4 week and 3 month visits if the 2 week visit demonstrated a decrease in IOP. These findings suggest that those patients who had a decreased IOP at 2 weeks and are at their goal IOP may not need to be screened until 3 months postoperatively.

  • ALT, argon laser trabeculoplasty
  • IOP, intraocular pressure
  • SLT, selective laser trabeculoplasty
  • TM, trabecular meshwork
  • VA, visual acuity
  • trabeculoplasty
  • intraocular pressure
  • ALT, argon laser trabeculoplasty
  • IOP, intraocular pressure
  • SLT, selective laser trabeculoplasty
  • TM, trabecular meshwork
  • VA, visual acuity
  • trabeculoplasty
  • intraocular pressure

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Footnotes

  • Ethical approval: This study gained the approval of the institutional review board (#04-639E).

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