Development of a prediction rule to estimate the probability of acceptable intraocular pressure reduction after selective laser trabeculoplasty in open-angle glaucoma and ocular hypertension.

PURPOSE: To develop and validate a prediction rule to estimate the probability of acceptable intraocular pressure (IOP) reduction after selective laser trabeculoplasty (SLT) in ocular hypertension and open-angle glaucoma. PATIENTS AND METHODS: The study population was derived from a cohort of 220 patients with ocular hypertension, open-angle glaucoma, or normal tension glaucoma. A > or =20% reduction in IOP (mm Hg) from the baseline IOP at 6 months after SLT was considered treatment success. Logistic multivariate regression modeling was performed to develop a prediction rule. RESULTS: In multivariate logistic regression analyses, pre-SLT IOP and maximum IOP were identified as independent predictors for > or =20% IOP reduction at 6 months with adjusted odds ratios of 1.3 and 0.9, respectively, controlling for sex, diagnosis, pigment of anterior chamber, and washout of eye drops. The area under receiver operator characteristic curve was 0.716. Calibration of this prediction rule showed good agreement between predicted and observed probabilities of acceptable IOP reduction. If a probability of acceptable IOP reduction of 50% or greater is used as the minimal clinical threshold for treatment, the prediction rule had a sensitivity and specificity of 91.3% and 30.4%, respectively. CONCLUSIONS: SLT efficacy is positively associated with IOP elevation before SLT treatment and adversely associated with the maximum IOP ever recorded in history. Pigmentation of the anterior chamber angle, diagnosis, washout of eye drops, and sex are not associated with SLT treatment efficacy. This prediction rule should be further validated with a comparable prospective clinical study cohort.

Selective laser trabeculoplasty as initial and adjunctive treatment for open-angle glaucoma.

PURPOSE: To investigate the efficacy and safety of selective laser trabeculoplasty as an initial treatment for newly diagnosed open-angle glaucoma, and its role as adjunctive therapy. PATIENTS AND METHODS: A prospective multicenter nonrandomized clinical trial was performed. Patients with newly diagnosed open-angle glaucoma or ocular hypertension were assigned to the primary (selective laser trabeculoplasty) treatment group or the control (latanoprost) group according to patient choice. Both groups were followed up at 1, 3, 6, and 12 months. A secondary treatment group was also included to study the efficacy of selective laser trabeculoplasty for patients intolerant of medical therapy or in whom such therapy was unsuccessful, with or without a history of previous argon laser trabeculoplasty. RESULTS: One hundred eyes (61 patients) were enrolled, 74 in the primary treatment group and 26 in the control group. The average absolute and percent reductions in intraocular pressure for the primary treatment group were 8.3 mm Hg or 31.0%, compared with 7.7 mm Hg or 30.6% for the control group (P = 0.208 and P = 0.879). The responder rates (20% pressure reduction) were 83% and 84% for the primary and control groups, respectively. There were no differences in intraocular pressure lowering with selective laser trabeculoplasty on the basis of angle pigmentation. A modest contralateral effect was observed in the untreated fellow eyes of patients undergoing selective laser trabeculoplasty. CONCLUSIONS: Selective laser trabeculoplasty was found to be equally efficacious as latanoprost in reducing intraocular pressure in newly diagnosed open-angle glaucoma and ocular hypertension over 12 months, independent of angle pigmentation. Nonsteroidal antiinflammatory therapy had similar efficacy to steroids after laser therapy. These findings support the consideration of selective laser trabeculoplasty as a first-line treatment for newly diagnosed open-angle glaucoma or ocular hypertension.

Dynamic atypical optic nerve coloboma associated with transient macular detachment.

PURPOSE: Macular schisis or detachment is frequently observed in eyes with optic pits or colobomas. Although spontaneous resolution of the maculopathy has been reported, concurrent changes in the optic nerve coloboma have not. We report three cases of atypical optic nerve colobomas in which dynamic optic nerve changes coincide with the development and subsequent resolution of the associated maculopathy. METHODS: We reviewed the records of three patients with dynamic optic nerve changes associated with maculopathy. All patients were observed for at least 6 months. Fundus photography and fluorescein angiography were used to document the optic nerve and macular changes. RESULTS: Three patients were noted to have macular detachments without apparent optic nerve excavation. With observation, the maculopathy spontaneously resolved in each case. We documented concurrent optic nerve changes whereby atypical optic nerve colobomas became apparent over several months in all cases. In one case, we noted the simultaneous development of maculopathy in association with obscuration of a prior disc anomaly. None of the eyes had a posterior vitreous detachment. We could not identify any associated systemic conditions or reproduce the findings with external stimulation. Initial Snellen acuity ranged from 20/60 to 20/200. Final Snellen acuity ranged from 20/20 to 20/40. CONCLUSIONS: Fluctuating optic nerve changes may occur in the setting of atypical optic nerve coloboma and associated maculopathy. In cases of macular schisis or detachment where an optic nerve coloboma is not readily apparent, and no other causes are identified, consideration of a period of observation prior to therapeutic intervention seems appropriate.