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Retreatment with argon laser trabeculoplasty.
C U Richter1, B J Shingleton, A R Bellows
1Glaucoma Service, Ophthalmic Consultants of Boston, Inc., MA 02114.
Ophthalmology
|September 1, 1987
Summary
Retreating glaucoma patients with argon laser trabeculoplasty offers limited success. While safe, retreatment of intraocular pressure (IOP) control is often unsuccessful, with low long-term efficacy.
Area of Science:
- Ophthalmology
- Glaucoma Management
- Laser Therapy
Background:
- Glaucoma is a leading cause of irreversible blindness worldwide.
- Argon laser trabeculoplasty (ALT) is a common treatment for open-angle glaucoma.
- Some patients experience recurrent intraocular pressure (IOP) elevation after initial successful ALT.
Purpose of the Study:
- To evaluate the efficacy and safety of repeat argon laser trabeculoplasty (ALT) in patients with previously treated glaucoma.
- To determine the success rate of 180-degree ALT retreatment for uncontrolled intraocular pressure (IOP).
Main Methods:
- Retrospective analysis of 40 eyes in 37 patients previously treated with 360-degree ALT.
- Patients with uncontrolled IOP on maximal medical therapy underwent 180-degree ALT retreatment.
- Success defined as a ≥3 mmHg IOP decrease, avoiding further interventions.
Main Results:
- Retreatment was successful in only 32% (13/40) of eyes.
- 68% (27/40) of eyes failed to achieve IOP control or required further treatment.
- One-year success probability was 33%, decreasing to 14% by 1.75 years.
- No significant IOP spikes (>6 mmHg) were observed post-retreatment.
Conclusions:
- Repeat ALT retreatment for glaucoma is safe but has a low probability of success.
- The IOP-lowering effect of repeat ALT is often temporary and limited.
- Alternative or adjunctive therapies should be considered for sustained IOP control in such cases.