Argon laser trabeculoplasty in pigmentary glaucoma.

Abstract

To evaluate the long-term effect of argon laser trabeculoplasty (ALT) in pigmentary glaucoma. The authors retrospectively analyzed results of ALT in 32 eyes of 32 patients with medically uncontrolled pigmentary glaucoma. Data were longitudinally adjusted to normalize the disparity in time of follow-up and evaluated by life-table analysis. Mean age (+/- standard deviation) was 45.1 +/- 13.1 years (range, 23-72 years) (males, 46.3 +/- 13.7 years; females, 42.9 +/- 12.2 years). Mean baseline intraocular pressure (IOP) was 27.8 +/- 5.3 mmHg. Mean follow-up time was 33.0 +/- 5.0 months (range, 1 week [immediate failures] to 96 months). Three eyes were lost to follow-up at 3 months. Eleven eyes required trabeculectomy between 1 week (2 eyes) and 37 months after laser treatment. Life-table analysis indicated a cumulative success for all eyes of 80% at 1 year, 62% at 2 years, and 45% at 6 years. Mean IOP was significantly reduced (P < 0.001; paired Student's t test) for male and female eyes at all intervals calculated. Age was a significant factor in determining time to failure. Argon laser trabeculoplasty is effective in pigmentary glaucoma. Younger patients had a greater chance of success than older patients at all intervals. This became highly significant (P < 0.001) after 3 years.