IRCT20180902040928N1 IRCT 2019-01-05 Basir eye health research center Pretreatment with topical betamethasone in ahmed glaucoma valve implantation Pretreatment with topical betamethasone in ahmed glaucoma valve implantation 2016-09-22 anticipated 108 Complete https://irct.ir/trial/33663 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: Stratified block randomization was performed. We divided eyes into 2 subgroups as follow: group 1: patients undergone previous failed antiglaucoma surgery, group 2: patients without previous antiglaucoma surgery. In each subgroup, eyes are randomly assigned to the study arms using random blocks: totally 108 patients were enrolled dividing into 2 groups of conventional Ahmed Glaucoma Valve (AGV) implantation (group A, 54 eyes), Ahmed Glaucoma Valve (AGV) with pre-operative dropped betamethasone (group B, 54 eyes), Blinding description: participants and data analyser were blinded in this study. N/A Glaucoma. Intervention 1: Intervention group: pre-treatment with betamethasone eye drop 1% from 3 days before surgery until the time of surgery, 6 times a day in patients candidate for insertion of Ahmed valve in supra temporal area of eye. Intervention 2: Control group: conventional insertion of Ahmed valve in supra temporal area of eye without pre-treatment betamethasone prescription. No - There is not a plan to make this available Justification or reason for not sharing IPD is Results will be shown in terms of published articles