Argon versus diode laser trabeculoplasty
PURPOSE; To compare the efficacy of diode laser and argon laser trabeculoplasty in a randomized prospective study of eleven paired fellow eyes. METHODS: Fellow eyes of eleven patients, requiring laser trabeculoplasty to lower intraocular pressure, were randomized to diode laser trabeculoplasty in one eye and argon laser trabeculoplasty in the other eye. RESULTS: In the diode laser group, the average baseline intraocular pressures were 21.6 ± 2.0 mm Hg before trabeculoplasty, and 19.6 ± 2.1 at one month, 19.3 ± 2.6 at two months, and 19.0 ± 3.3 at three months postoperatively. In the argon laser group, the average intraocular pressures were 24.4 ± 3.3 mm Hg prior to treatment, and 17.6 ± 1.7 at one month, 16.8 ± 2.5 at two months, and 15.5 ± 1.2 at three months after laser trabeculoplasty. The differences from baseline intraocular pressure were statistically significant (p < 0.01) at all time periods for the argon laser group, but were not statistically significant at any of the follow-up periods in the diode laser group. In addition, the difference between argon and diode laser in reducing intraocular pressure was statistically significant at one month (p < 0.01), 2 months (p < 0.01), and three months (p < 0.05) after treatment. Intraocular pressures were higher one hour postoperatively with argon trabeculoplasty than with diode treatment, but these values were not statistically significant. Subjectively, patients noted less discomfort with die diode laser. CONCLUSIONS: Argon laser trabeculoplasty appears to be more effective than diode laser therapy in lowering intraocular pressure during the first three months following treatment.
Englert, JA; Cox, TA; Allingham, RR; Shields, MB
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