Ab-Interno Canaloplasty (ABiC) was the focus of three posters at the American Glaucoma Society (AGS) 2017 Annual Meeting in San Diego, California (March 2-5).

The following was true for all three studies:

  1. Analyzed ABiC alone and combined with cataract surgery
  2. Had 12-month data
  3. Showed a significant reduction in either average Intraocular Pressure (IOP), number of glaucoma medications required for IOP control, or both
  4. No serious complications were encountered

These studies further support what has already been known by experienced canaloplasty surgeons:

  • It works
  • It’s low risk

Additional studies will still be necessary to confirm that ABiC works as well and as long as Ab-Externo Canaloplasty. However, given its incredible safety profile combined with moderate IOP reduction, ABiC is poised to be an ideal surgical treatment option for anyone with uncontrolled moderate open angle glaucoma.


  1. Gedde SJ, Schiffman JC, Feuer WJ, et al. Treatment outcomes in the Tube Versus Trabeculectomy (TVT) study after five years of follow-up. Am J Ophthalmol. 2012;153:789-803.j
  2. Gedde SJ, Herndon LW, Brandt JD, et al. Postoperative Complications in the Tube Versus Trabeculectomy (TVT) Study During Five Years of Follow-up. Am J Ophthalmol. 2012 May;153(5):804-814.
  3. Law SK, Shih K, Tran DH, et al. Long-term outcomes of repeat vs initial trabeculectomy in open-angle glaucoma. Am J Ophthalmol. 2009;148:685-695.
  4. Bruisini P, Tosoni C. Canaloplasty after failed trabeculectomy: a possible option. J Glaucoma. 2014;23:33-34.
  5. Xin C, Chen X, Shi Y, Wang H, Wang N. Modified Canaloplasty: A New, Effective, and Safe Option for Glaucoma Patients With a Disrupted Schlemm Canal Wall. J Glaucoma. 2016;25:798-801.

Has your trabeculectomy failed?

You may still be a candidate for Canaloplasty.

David Richardson, MD

David Richardson, MD

Medical Director, San Marino Eye

David Richardson, M.D. is recognized as one of the top cataract and glaucoma surgeons in the US and is among an elite group of glaucoma surgeons in the country performing the highly specialized canaloplasty procedure. Morever, Dr. Richardson is one of only a few surgeons in the greater Los Angeles area that performs MicroPulse P3™ "Cyclophotocoagulation" (MP3) glaucoma laser surgery. Dr. Richardson graduated Magna Cum Laude from the University of Southern California and earned his Medical Degree from Harvard Medical School. He completed his ophthalmology residency at the LAC+USC Medical Center/ Doheny Eye Institute. Dr. Richardson is also an Ambassador of Glaucoma Research Foundation.

Pin It on Pinterest

Share This Page

Share information about glaucoma with your friends and family!