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Related Experiment Videos

Argon versus selective laser trabeculoplasty.

S Van de Veire1, T Zeyen, I Stalmans

  • 1Department of Ophthalmology, UZ St. Rafaël, KU, Leuven. sara.vandeveire@uz.kuleuven.ac.be

Bulletin De La Societe Belge D'Ophtalmologie
|May 10, 2006
PubMed
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Argon laser trabeculoplasty (ALT) and selective laser trabeculoplasty (SLT) show similar short-term efficacy for lowering intraocular pressure. However, SLT may cause a paradoxical IOP rise in pigment dispersion glaucoma (PDG) patients.

Area of Science:

  • Ophthalmology
  • Glaucoma Management
  • Laser Therapy

Background:

  • Glaucoma is a leading cause of irreversible blindness.
  • Laser trabeculoplasty is a common treatment to reduce intraocular pressure (IOP).
  • Argon laser trabeculoplasty (ALT) and selective laser trabeculoplasty (SLT) are two primary laser therapies.

Purpose of the Study:

  • To compare the efficacy of conventional ALT versus SLT in lowering IOP.
  • To evaluate the short-term outcomes of these laser treatments in glaucoma patients.

Main Methods:

  • A retrospective study included 56 eyes from 44 patients with various types of glaucoma.
  • Patients received either ALT (n=18) or SLT (n=38).
  • Intraocular pressure (IOP) was measured before and 3-5 weeks after treatment.

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Main Results:

  • Initial analysis showed a 22.4% IOP reduction with ALT and 15.5% with SLT (p=0.141).
  • Two patients with pigment dispersion glaucoma (PDG) who received SLT experienced a paradoxical IOP rise (+15.5%).
  • Excluding these patients revealed similar efficacy: ALT (-19%) and SLT (-17.9%) (p=0.836).
  • A separate small study confirmed paradoxical IOP rise with low-energy SLT in heavily pigmented angles.

Conclusions:

  • Short-term efficacy of ALT and SLT for IOP reduction is comparable.
  • SLT may lead to a paradoxical IOP increase in PDG patients.
  • Lower energy settings may be necessary for SLT in patients with heavily pigmented trabeculae.