A comparison of deep sclerectomy trainer versus trainee outcomes

Tanya Karaconji, Karl Mercieca, Pau Romera, Andrew McNaught, Nitin Anand

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Purpose:The aim of this study was to compare the results of deep sclerectomy (DS) and combined deep sclerectomy with phacoemulsification (phaco-DS) performed by clinical fellows with those by an experienced glaucoma surgeon and DS trainer.Patients and Methods:This is a retrospective nonrandomized study of 266 eyes of 226 consecutive patients who had DS or phaco-DS between March 2014 and December 2016 which were included from a database of all glaucoma surgery performed in our department. A minimum of 9 months follow-up was required. The cases were recorded as to whether a fellow or consultant performed the entire procedure. Overall, 114 surgeries were performed by the consultant and 164 surgeries were performed by the fellow, in which 91 cases received no assistance from the consultant. Intraocular pressure (IOP) success criteria were: (A) IOP<22 mm Hg and/or 20% decrease from baseline off any glaucoma medications and (B) IOP<16 mm Hg and/or 30% drop from baseline off any glaucoma medications.Results:No statistically significant difference was noted by any criteria (P<0.05) between the 2 groups. The Kaplan-Meir IOP success rates at 2 years with criteria B (IOP<16 mm Hg without medications) were 64% for consultant, 76% for independent surgeries done by a fellow and 72% for surgeries with assistance from the consultant trainer (P=0.15). There were no significant differences between measured IOPs at any time after surgery. Intraoperative perforation of trabeculo-Descemet membrane was noted in 4 cases (3.5%) done by the consultant and 12 cases (7.3%) performed by fellows (Fisher exact P=0.19).Conclusions:IOP outcomes of DS and phaco-DS were not adversely affected if fellows performed surgery, whether under supervision or independently.

Original languageEnglish
Pages (from-to)427-432
Number of pages6
JournalJournal of Glaucoma
Issue number5
StatePublished - May 1 2019


  • deep sclerectomy
  • glaucoma
  • nonpenetrating glaucoma surgery
  • surgical training
  • training outcomes


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