trans-scleral diode laser cyclophotocoagulation for management of elevated intraocular pressure after pars-plana vitrectomy

purpose: to evaluate the effect of trans-scleral cyclophotocoagulation (tscpc) in reducing intraocular pressure in eyes with history of pars plana vitrectomy with or without intraocular silicone oil and refractory to medical treatment. methods: medical records of 35 eyes of 35 patients who underwent tscpc for medically uncontrolled glaucoma after pars plana vitrectomy for retinal pathology were reviewed retrospectively. diode laser contact tscpc was performed at a power of 1-3 watt, for a duration of 2 seconds and with 15-30 applications. intraocular pressure, visual acuity, number of previous operations, number of medications, number of treatment sessions per eye. laser parameters and complications were evaluated. results: after a mean follow-up period of 13.31±4 (range 6-60) months, mean iop was decreased from 33.46±9.80 (12-38) mmhg before surgery to 16.57±8.21 (2-46) mmhg after tscpc (p<0.001). the number of anti-glaucoma medications was reduced from 2.60±1.09 preoperatively to 1.31±0.99 at final follow up (p<0.001). qualified success and complete success were achieved in 29 (83%) and 9 eyes (20%), respectively. conclusion: patients with medically uncontrolled intraocular pressure following to pars plana vitrectomy with or without intravitreal silicone oil can be treated successfully with tscpc.