Long-Term Clinical Outcomes of Combined Pars Plana Ahmed Glaucoma Valve Implantation and Vitrectomy
10.3341/jkos.2026.67.5.153
- Author:
Jong Min LEE
1
;
Jong Hyun LEE
;
Dong Jin HAN
;
Min Chae KANG
;
Do Hyung LEE
;
Min Kyung SONG
Author Information
1. Department of Ophthalmology, Ilsan Paik Hospital, Inje University College of Medicine, Goyang, Korea
- Publication Type:Original Article
- From:Journal of the Korean Ophthalmological Society
2026;67(5):153-161
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
Purpose:We evaluated the long-term clinical outcomes of pars plana Ahmed glaucoma valve (AGV) implantation combined with vitrectomy in patients with glaucoma.
Methods:We included 25 eyes of glaucoma patients requiring pars plana vitrectomy who underwent combined pars plana AGV implantation and vitrectomy due to uncontrolled intraocular pressure (IOP) despite maximal medical therapy. Surgical success was defined as maintaining IOP between 6 and 21 mmHg, irrespective of topical IOP-lowering medication use. Surgical failure was defined as inadequate IOP control or a decline in visual acuity to no light perception. Preoperative and postoperative parameters, including visual acuity, IOP, number of topical IOP-lowering medications, surgical success rate, corneal endothelial cell density, and postoperative complications, were analyzed.
Results:The mean follow-up period was 49.5 ± 12.5 months. The mean preoperative IOP of 32.4 ± 8.4 mmHg significantly decreased to 18.0 ± 9.2 mmHg at the final visit (p < 0.001). Based on Kaplan–Meier survival analysis, the cumulative surgical success rates were 80% at 1 year, 72% at 2 years, and 68% at 5 years postoperatively. The overall success rate at the final follow-up was 76%. Corneal endothelial cell density decreased by 16.5% compared to preoperative values. Early postoperative complications (within 1 month) included hypotony in 16% of eyes, choroidal detachment in 12%, vitreous hemorrhage in 12%, and hyphema in 4%. Late complications included corneal endothelial dysfunction in one eye (4%).
Conclusions:In glaucoma patients requiring pars plana vitrectomy combined pars plana Ahmed glaucoma valve implantation and vitrectomy achieved sustained IOP reduction with a relatively low rate of complications. This combined surgical approach appears to be a safe and effective long-term treatment option for refractory glaucoma cases requiring posterior segment intervention.
