Japanese Journal of Ophthalmology

, Volume 62, Issue 2, pp 201–208 | Cite as

Comparative outcomes of trabeculotomy ab externo versus trabecular ablation ab interno for open angle glaucoma

  • Eri Kinoshita-Nakano
  • Hideo Nakanishi
  • Hanako Ohashi-Ikeda
  • Satoshi Morooka
  • Tadamichi AkagiEmail author
Clinical Investigation



To compare clinical outcomes between trabeculotomy ab externo (TLO) and trabecular ablation ab interno using a Trabectome (TAT) for open angle glaucoma (OAG).

Study Design

Prospective and retrospective cohort study.


We prospectively recruited 68 patients who underwent TAT between May 2013 and July 2015, and retrospectively recruited 59 patients who underwent TLO between April 2010 and May 2013. We included OAG patients who could be followed up for more than 12 months after surgery. Surgical outcomes were compared between groups. Kaplan-Meier analyses and Cox proportional hazards’ models were used for four sets of criteria using postoperative intraocular pressures (IOP) ≤ 18 or ≤ 16 mmHg, and/or showing ≥ 20% reduction from baseline.


Mean preoperative IOPs were 22.6 ± 7.4 mmHg in the TAT group and 24.3 ± 6.6 mmHg in the TLO group. Mean postoperative IOPs in the TAT group were 15.8 ± 3.6 mmHg at 12-months, and 15.7 ± 5.5 mmHg at 36-months, and 16.0 ± 3.4 mmHg at 12 months and 15.2 ± 3.8 mmHg at 36 months in the TLO group. Postoperatively, success rates at 36-months were significantly higher in the TLO group in some criteria; IOP reductions at 1- and 2- years were significantly higher in the TLO group; these differences were not significant after adjustment with other potential prognostic factors. The number of glaucoma medications were significantly higher in the TAT group, at 2-years (P < 0.001) but not at 3-years (P = 0.22).


Surgical successes following TLO and TAT are not significantly different 3 years postoperatively after adjustment of potential prognostic factors.


Open angle glaucoma Trabecular ablation Trabectome Trabeculotomy ab externo Surgical outcome 



The Japan Society for the Promotion of Science (JSPS) provided financial support in the form of KAKENHI Grant Number 25462713. The sponsor had no role in the design or conduct of this research.

Conflicts of interest

E. K. -Nakano, None; H. Nakanishi, None; H. O. -Ikeda, None; S. Morooka, None; T. Akagi, Lecture fees (Alcon, Kowa, Pfizer, Santen, Senju).

Supplementary material

10384_2017_559_MOESM1_ESM.pdf (68 kb)
Supplementary material 1 (PDF 67 kb)
10384_2017_559_MOESM2_ESM.pdf (52 kb)
Supplementary material 2 (PDF 51 kb)


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Copyright information

© Japanese Ophthalmological Society 2017

Authors and Affiliations

  • Eri Kinoshita-Nakano
    • 1
  • Hideo Nakanishi
    • 1
  • Hanako Ohashi-Ikeda
    • 1
  • Satoshi Morooka
    • 1
  • Tadamichi Akagi
    • 1
    Email author
  1. 1.Department of Ophthalmology and Visual SciencesKyoto University Graduate School of MedicineKyotoJapan

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