Ex-PRESS miniature glaucoma shunt versus ahmed glaucoma valve in the surgical treatment of glaucoma in pseudophakic patients

Zoya Rabkin-Mainer, Alvit Wolf, Nurit Mathalone, Alina Melamud, Gila Buckman, Beth Edmunds, Nili Stein, David M. Steinberg, Orna Geyer

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Purpose: The aim of this study was to compare the 3-year outcome of Ex-PRESS miniature glaucoma shunt versus Ahmed glaucoma valve in pseudophakic patients. Patients and Methods: We retrospectively reviewed the records of patients with a history of clear corneal phacoemulsification alone, or failed trabeculectomy following phacoemulsification, who subsequently underwent Ahmed glaucoma valve (AGV) implantation or Ex-PRESS shunt surgery. The main outcome measure, surgical success, was defined as an intraocular pressure between 5 and 21 mm Hg and a 20% intraocular pressure reduction from baseline (with/without glaucoma medications) without glaucoma reoperation. Results: In total, 92 patients (92 eyes) were included (43 AGV, 49 Ex-PRESS). Overall success at 3 years was 92.7% for AGV and 66.1% for Ex-PRESS (P=0.006). AGV had a higher success rate in patients with prior phacoemulsification and failed trabeculectomy (96% AGV vs. 64.1% Ex-PRESS; P=0.023). There was no difference in success rate for patients with only previous phacoemulsification (87.5% AGV vs. 69.4% Ex-PRESS; P=0.205). Glaucoma reoperation rates were 4.6% and 30.6% in the AGV and Ex-PRESS group, respectively (P=0.001). Both procedures had similar complication rates. Conclusions: AGV compared with Ex-PRESS shunt, had a higher success rate for secondary surgeries but not primary surgeries, in patients with prior clear corneal phacoemulsification. The AGV surgery also had a lower overall glaucoma reoperation rate.

Original languageEnglish (US)
Pages (from-to)887-892
Number of pages6
JournalJournal of Glaucoma
Issue number10
StatePublished - Oct 1 2018


  • Ahmed glaucoma valve (AGV)
  • Ex-PRESS shunt
  • glaucoma
  • pseudophakia

ASJC Scopus subject areas

  • Ophthalmology


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