PARS PLANA AHMED VALVE AND VITRECTOMY IN PATIENTS WITH GLAUCOMA ASSOCIATED WITH POSTERIOR SEGMENT DISEASEWallsh, Josh O. BS; Gallemore, Ron P. MD, PhD; Taban, Mehran MD; Hu, Charles BS; Sharareh, Behnam BSRETINA: November/December 2013 - Volume 33 - Issue 10 - p 2059–2068 doi: 10.1097/IAE.0b013e31828992c3 Original Study Abstract In Brief Author Information Purpose: To assess the safety and efficacy of a modified technique for pars plana placement of the Ahmed valve in combination with pars plana vitrectomy in the treatment of glaucoma associated with posterior segment disease. Methods: Thirty-nine eyes with glaucoma associated with posterior segment disease underwent pars plana vitrectomy combined with Ahmed valve placement. All valves were placed in the pars plana using a modified technique, without the pars plana clip, and using a scleral patch graft. Results: The 24 eyes diagnosed with neovascular glaucoma had an improvement in intraocular pressure from 37.6 mmHg to 13.8 mmHg and best-corrected visual acuity from 2.13 logarithm of minimum angle of resolution to 1.40 logarithm of minimum angle of resolution. Fifteen eyes diagnosed with steroid-induced glaucoma had an improvement in intraocular pressure from 27.9 mmHg to 14.1 mmHg and best-corrected visual acuity from 1.38 logarithm of minimum angle of resolution to 1.13 logarithm of minimum angle of resolution. Complications included four cases of cystic bleb formation and one case of choroidal detachment and explantation for hypotony. Conclusion: Ahmed valve placement through the pars plana during vitrectomy is an effective option for managing complex cases of glaucoma without the use of the pars plana clip. Supplemental Digital Content is Available in the Text.In patients with recalcitrant glaucoma associated with posterior segment disease, pars plana Ahmed valve implantation and vitrectomy can successfully manage intraocular pressure and improve visual acuity. Retina Macula Institute, Torrance, California. Reprint requests: Ron P. Gallemore, MD, PhD, 4201 Torrance Boulevard Suite 220, Torrance, CA 90503; e-mail: firstname.lastname@example.org The authors have no financial or conflicts of interest to disclose. Supplemental digital content is available for this article. Direct URL citations appear in the printed text and are provided in the HTML and PDF versions of this article on the journal's Web site (www.retinajournal.com). © 2013 by Ophthalmic Communications Society, Inc.