Selection of laser pulse energy when performing selective laser trabeculoplasty in patients with primary open-angle glaucoma

We analyzed the results of selective laser trabeculoplasty (SLT) in 105 patients with primary open-angle glaucoma (105 eyes) associated with pigment dispersion syndrome, aged 18 to 54 years. After each stage of SLT there was a decrease in the degree of trabecular pigmentation, which was characterized by a significant increase in the value of the relative lightness index (Lightness index). As the degree of trabecula pigmentation decreased after each stage of SLT, a higher level of laser pulse energy was required: from 0.3 mJ at sharply pronounced pigmentation to 0.8 mJ at weak degree of trabecula pigmentation. The weak degree of trabecula pigmentation was noted at Lightness index values over 75 % and was characterized by reliable and maximal improvement of the index of intraocular fluid outflow ease.