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Comparison of outcomes in patients treated with ab-interno canaloplasty (ABiC) in one eye and traditional ab-externo canaloplasty in the fellow eye: a twelve-month follow-up of patients with primary open-angle glaucoma

Poster Details

First Author: M.Gallardo USA

Co Author(s):    R. Supnet                    

Abstract Details


To compare the safety and efficacy of minimally-invasive ab interno canaloplasty (ABiC) with traditional canaloplasty in reducing intraocular pressure (IOP) and glaucoma medication dependence.


El Paso Eye Surgeons, El Paso, Texas, United States of America.


This non-randomized, single-center case series evaluated the 12-month outcomes of seven patients with mild-to-moderate primary open-angle glaucoma (POAG) who underwent ABiC surgery in one eye (6 right, 1 left eye) and traditional canaloplasty in the fellow eye. Primary endpoints included mean IOP and a reduction in the number of glaucoma medications at 1, 3, 6 and 12 months. Secondary endpoints included the incidence of surgical complications and secondary interventions.


Postoperative reductions in both IOP and medication use were comparable with ABiC and traditional canaloplasty, with respective mean IOPs falling from 17.9 and 18.0 mmHg preoperatively to 13.9 and 13.3 mmHg at 1 year postoperatively. The number of medications used by each patient decreased from a mean of 2.3 preoperatively to 0.9 at 1 year for both groups. Intra- and postoperative complications were rare in both the ABiC and traditional canaloplasty procedures, and no serious adverse events were recorded.


This case series demonstrates that the ABiC procedure delivers comparable results to traditional canaloplasty in reducing IOP and dependence on anti-glaucoma medications in patients with open-angle glaucoma. The ABiC procedure should be considered a suitable method for restoring natural ocular outflow without scleral incision or tensioning sutures. Further study is required with a larger cohort to corroborate these findings.

Financial Disclosure:

receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented, travel has been funded, fully or partially, by a company producing, developing or supplying the product or procedure presented

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