Diode laser trabeculoplasty in open angle glaucoma: 50μ vs. 100μ spot size

The study was aimed at evaluating the efficacy of diode laser trabeculoplsaty in lowering intraocular pressure in patients with both primary open-angle glaucoma and exfoliation glaucoma by using different size of laser spot. This six-month, unmasked, controlled, prospective study included sixty-two patients with the same number of eyes, who were divided into two groups. Trabeculoplasty was performed with 50 ? and 100 ? laser spot size in the group I and group II, respectively. Other laser parameters were the same for both groups: the wave length of 532 nm, 0.1 second single emission with the power of 600-1200 mW was applied on the 180 degrees of the trabeculum. The mean intraocular pressure decrease in the 50 ? group (group I) on day 7 was 24% from the baseline and after six-month follow-up period the intraocular pressure decrease was 29.8% (p&lt;0.001). In the 100? group (group II), the mean intraocular pressure decrease on day 7 was 26.5% and after six months it was 39% (p&lt;0.001).</jats:p