scholarly journals Primary Outcomes of Combined Cataract Extraction Technique with Ab-interno Trabeculectomy  and Endoscopic Cyclophotocoagulation  in Patients with Primary Open Angle Glaucoma

2020 ◽  
Author(s):  
Juan Carlos Izquierdo ◽  
Josefina Mejias ◽  
Laura Cañola ◽  
Natalia Agudelo ◽  
Barbara Rubio
Keyword(s):  
Primary Open Angle Glaucoma ◽  
Open Angle Glaucoma ◽  
Glaucoma Surgery ◽  
Open Angle ◽  
Surgical Success ◽  
Corrected Visual Acuity ◽  
Ab Interno Trabeculectomy ◽  
The Mean ◽  
Best Corrected Visual Acuity ◽  
Ab Interno

Abstract Background: Glaucoma surgery have been developed to lower intraocular pressure in a less invasive manner than traditional glaucoma surgery. The purpose of this article is to determine the outcome of using combined phacoemulsification technique, ab-interno trabeculectomy dual blade and endoscopic cyclophotocoagulation (ECP) surgeries in patients with primary open angle glaucoma. Methods: A retrospective case series was performed on 27 consecutive eyes with both primary open-angle glaucoma (POAG) and cataract; each eye was treated with combined phacoemulsification, ab-interno trabeculectomy-Kahook Dual Blade and Endocyclophotocoagulation at Instituto de ojos Oftalmosalud, Lima, Peru, between April 2017 and May 2017. Inclusion criteria: 1) Patients with uncontrolled mild to advanced POAG (according to Glaucoma Grading Scale HODAPP) 2) cataract condition 3) treatment with two or more glaucoma medications due to rapid progression in the visual fields (at least two in a short period of time). Intraocular pressure (IOP), best corrected visual acuity (BCVA) logMAR and number of glaucoma medications were recorded prior to the study, at day 1, week 1, and 1,3,6 and 9 months after surgery. Primary outcome measure was surgical success defined in terms of IOP <14 mmHg either with no medications (complete success) or with medications (qualified success). Results: A total of 27 eyes from 27 patients were included. The mean basal IOP was 17.0±3.7 mmHg and postoperatively was 11.6±1.9 mmHg and 11.4±1.8 mmHg (P<0.001) at 6 and 9 months respectively. Glaucoma medications decreased from 1.9±1.4 to 0.56±1.05 at 9 month follow-ups (P<0.001). Preoperative best corrected visual acuity (BCVA) showed and improvement from 0.4± 0.4 LogMAR to 0.2 ± 0.4 logMAR at 9 months. The main complication was blood reflux intra-operatively (66.7%), which resolved without re-operation. The mean IOP was reduced by 32.9% from baseline and the surgical success was 92,6%, (complete success 70,3% and qualified success 29,6%) at 9 months.Conclusions: In patients with POAG, combined treatment with phacoemulsification, ab-interno trabeculectomy and endoscopic cyclophotocoagulation effectively reduced IOP and glaucoma medication dependence.

scholarly journals Primary outcomes of combined cataract extraction technique with Ab-Interno trabeculectomy and endoscopic Cyclophotocoagulation in patients with primary open angle Glaucoma

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Juan Carlos Izquierdo ◽  
Josefina Mejías ◽  
Laura Cañola-R ◽  
Natalia Agudelo ◽  
Bárbara Rubio
Keyword(s):  
Primary Open Angle Glaucoma ◽  
Open Angle Glaucoma ◽  
Glaucoma Surgery ◽  
Open Angle ◽  
Surgical Success ◽  
Corrected Visual Acuity ◽  
Ab Interno Trabeculectomy ◽  
The Mean ◽  
Best Corrected Visual Acuity ◽  
Ab Interno

Abstract Background Glaucoma surgery have been developed to lower intraocular pressure in a less invasive manner than traditional glaucoma surgery. The purpose of this article is to determine the outcome of using combined phacoemulsification technique, ab-interno trabeculectomy dual blade and endoscopic cyclophotocoagulation (ECP) surgeries in patients with primary open angle glaucoma. Methods A retrospective case series was performed on 27 consecutive eyes with both primary open-angle glaucoma (POAG) and cataract; each eye was treated with combined phacoemulsification, ab-interno trabeculectomy-Kahook Dual Blade and Endocyclophotocoagulation at Instituto de ojos Oftalmosalud, Lima, Peru, between April 2017 and May 2017. Inclusion criteria: 1) Patients with uncontrolled mild to advanced POAG (according to Glaucoma Grading Scale HODAPP) 2) cataract condition 3) treatment with two or more glaucoma medications due to rapid progression in the visual fields (at least two in a short period of time). Intraocular pressure (IOP), best corrected visual acuity (BCVA) logMAR and number of glaucoma medications were recorded prior to the study, at day 1, week 1, and 1,3,6 and 9 months after surgery. Primary outcome measure was surgical success defined in terms of IOP < 14 mmHg either with no medications (complete success) or with medications (qualified success). Results A total of 27 eyes from 27 patients were included. The mean basal IOP was 17.0 ± 3.7 mmHg and postoperatively was 11.6 ± 1.9 mmHg and 11.4 ± 1.8 mmHg (P < 0.001) at 6 and 9 months respectively. Glaucoma medications decreased from 1.9 ± 1.4 to 0.56 ± 1.05 at 9 month follow-ups (P < 0.001). Preoperative best corrected visual acuity (BCVA) showed and improvement from 0.4 ± 0.4 LogMAR to 0.2 ± 0.4 logMAR at 9 months. The main complication was blood reflux intra-operatively (66.7%), which resolved without re-operation. The mean IOP was reduced by 32.9% from baseline and the surgical success was 92,6%, (complete success 70,3% and qualified success 29,6%) at 9 months. Conclusions In patients with POAG, combined treatment with phacoemulsification, ab-interno trabeculectomy and endoscopic cyclophotocoagulation effectively reduced IOP and glaucoma medication dependence.

scholarly journals Primary Outcomes of Combined Cataract Extraction Technique with Ab-interno Trabeculectomy  and Endoscopic Cyclophotocoagulation  in Patients with Primary Open Angle Glaucoma

2020 ◽  
Author(s):  
Juan Carlos Izquierdo ◽  
Josefina Mejias ◽  
Laura Cañola ◽  
Natalia Agudelo ◽  
Barbara Rubio
Keyword(s):  
Visual Acuity ◽  
Primary Open Angle Glaucoma ◽  
Open Angle Glaucoma ◽  
Open Angle ◽  
Surgical Success ◽  
Corrected Visual Acuity ◽  
Ab Interno Trabeculectomy ◽  
The Mean ◽  
Best Corrected Visual Acuity ◽  
Ab Interno

Abstract Background: To determine the outcome of using combined phacoemulsification technique, ab-interno trabeculectomy dual blade and endoscopic cyclophotocoagulation (ECP) surgeries in patients with primary open angle glaucoma. Methods: A retrospective case series was performed on 27 consecutive eyes with both primary open-angle glaucoma (POAG) and cataract; each eye was treated with combined phacoemulsification, ab-interno trabeculectomy-Kahook Dual Blade and Endocyclophotocoagulation at Instituto de ojos Oftalmosalud, Lima, Peru, between April 2017 and May 2017. Inclusion criteria: 1) Patients with uncontrolled mild to advanced POAG (according to Glaucoma Grading Scale HODAPP) 2) cataract condition 3) treatment with two or more glaucoma medications due to rapid progression in the visual fields (at least two in a short period of time). Intraocular pressure (IOP), best corrected visual acuity (BCVA) logMAR and number of glaucoma medications were recorded prior to the study, at day 1, week 1, and 1,3,6 and 9 months after surgery. Primary outcome measure was surgical success defined in terms of IOP <14 mmHg either with no medications (complete success) or with medications (qualified success). Results: A total of 27 eyes from 27 patients were included. The mean basal IOP was 17.0±3.7 mmHg and postoperatively was 11.6±1.9 mmHg and 11.4±1.8 mmHg (P<0.001) at 6 and 9 months respectively. Glaucoma medications decreased from 1.9±1.4 to 0.56±1.05 at 9 month follow-ups (P<0.001). Preoperative best corrected visual acuity (BCVA) showed and improvement from 0.4± 0.4 LogMAR (p<0.001) to 0.2 ± 0.4 logMAR at 9 months. The main complication was blood reflux intra-operatively (66.7%), which resolved without re-operation. The mean IOP was reduced by 32.9% from baseline and the surgical success was 92,6%, (complete success 70,3% and qualified success 29,6%) at 9 months. Conclusions: In patients with POAG, combined treatment with phacoemulsification, ab-interno trabeculectomy and endoscopic cyclophotocoagulation effectively reduced IOP and glaucoma medication dependence.

scholarly journals Primary Outcomes of Combined Cataract Extraction Technique with Ab-interno Trabeculectomy  and Endoscopic Cyclophotocoagulation  in Patients with Primary Open Angle Glaucoma

2020 ◽  
Author(s):  
Juan Carlos Izquierdo ◽  
Josefina Mejias ◽  
Laura Cañola ◽  
Natalia Agudelo ◽  
Barbara Rubio
Keyword(s):  
Visual Acuity ◽  
Primary Open Angle Glaucoma ◽  
Open Angle Glaucoma ◽  
Open Angle ◽  
Surgical Success ◽  
Corrected Visual Acuity ◽  
Ab Interno Trabeculectomy ◽  
The Mean ◽  
Best Corrected Visual Acuity ◽  
Ab Interno

Abstract Background: To determine the outcome of using combined phacoemulsification technique, ab-interno trabeculectomy dual blade and endoscopic cyclophotocoagulation (ECP) surgeries in patients with primary open angle glaucoma. Methods:  A retrospective case series was performed on 27 consecutive eyes with both primary open-angle glaucoma (POAG) and cataract; each eye was treated with combined phacoemulsification, ab-interno trabeculectomy-Kahook Dual Blade and Endocyclophotocoagulation at Instituto de ojos Oftalmosalud, Lima, Peru, between April 2017 and May 2017. Inclusion criteria: 1) Patients with uncontrolled mild to advanced POAG (according to Glaucoma Grading Scale HODAPP) 2) cataract condition 3) treatment with two or more glaucoma medications due to rapid progression in the visual fields (at least two in a short period of time). Intraocular pressure (IOP), best corrected visual acuity (BCVA) logMAR and number of glaucoma medications were recorded prior to the study, at day 1, week 1, and 1,3,6 and 9 months after surgery. Primary outcome measure was surgical success defined in terms of IOP <14 mmHg either with no medications (complete success) or with medications (qualified success). Results: A total of 27 eyes from 27 patients were included. The mean basal IOP was 17.0±3.7 mmHg and postoperatively was 11.6±1.9 mmHg and 11.4±1.8 mmHg (P<0.001) at 6 and 9 months respectively. Glaucoma medications decreased from 1.9±1.4 to 0.56±1.05 at 9 month follow-ups (P<0.001). Preoperative best corrected visual acuity (BCVA) showed and improvement from 0.4± 0.4 LogMAR to 0.2 ± 0.4 logMAR at 9 months. The main complication was blood reflux intra-operatively (66.7%), which resolved without re-operation. The mean IOP was reduced by 32.9% from baseline and the surgical success was 92,6%, (complete success 70,3% and qualified success 29,6%) at 9 months.Conclusions: In patients with POAG, combined treatment with phacoemulsification, ab-interno trabeculectomy and endoscopic cyclophotocoagulation effectively reduced IOP and glaucoma medication dependence.

scholarly journals Primary Outcomes of combined cataract extraction technique with ab-interno trabeculectomy  Dual-Blade and Endoscopic cyclophotocoagulation in patients with primary open angle glaucoma

2019 ◽  
Author(s):  
Juan Carlos Izquierdo ◽  
Josefina Mejias ◽  
Laura Cañola ◽  
Natalia Agudelo ◽  
Barbara Rubio
Keyword(s):  
Visual Acuity ◽  
Primary Open Angle Glaucoma ◽  
Open Angle Glaucoma ◽  
Cataract Extraction ◽  
Open Angle ◽  
Corrected Visual Acuity ◽  
Ab Interno Trabeculectomy ◽  
The Mean ◽  
Best Corrected Visual Acuity ◽  
Ab Interno

Abstract Purpose:  To provide an update of primary outcomes of combined phacoemulsification technique with ab-interno trabeculectomy  Dual Blade and Endoscopic cyclophotocoagulation (ECP) in patients with primary open angle glaucoma. Methods: Retrospective case series comprised 27 consecutive eyes, with open-angle glaucoma (POAG) and cataract with combined phacoemulsification, ab-interno trabeculectomy-Kahook Dual Blade and Endocyclophotocoagulation at Instituto de ojos Oftalmosalud, Lima, Perú, between April 2017 and May 2017. Inclusion criteria were Glaucoma patients with POAG from mild to severe, according to Glaucoma Grading Scale (HODAPP), cataract condition, treatment with two or more glaucoma medications and visual field defects continued worsen. Intraocular pressure (IOP), Best corrected visual acuity (BCVA) logMAR, and number of glaucoma medications were recorded before, and 1 day, 1 week, and 1, 3, 6 and 9 months after surgery. Defining succes as IOP <14 mmHg with or without medications. Results:  A total of 27 cases of glaucoma eyes were included. The mean IOP was 17.0±3.7 mmHg preoperatively, 11.6±1.9mmHg at 6 months, and 11.4±1.8 mmHg at 9 months(P<0.001). There was a corresponding drop in glaucoma medications from 1.9±1.41 at mean to 0.56±1.05 at 9 months (P<0.001). Preoperative best corrected visual acuity (BCVA) showed and improvement preoperative value from 0.4± 0.4 LogMAR (p= 0.001) to 0.2 ± 0.4 logMAR at 9 months. The main complication was blood reflux intraoperatively(66.7%), resolved within a few days. The mean IOP was reduce 32.9% from baseline and the qualifed succes was 92.6% at 9 months. Conclusions:  Cataract extraction with phacoemulsification combined with ab-interno trabeculectomy Dual Blade and endoscopic Cyclophotocoagulation effectively lowered IOP and dependence on glaucoma medications.

scholarly journals Ab interno trabeculotomy combined with cataract extraction in eyes with primary open-angle glaucoma

2020 ◽  
Vol 48 (9) ◽  
pp. 030006052095744
Author(s):  
Yuan-Zhi Chen ◽  
Ai-Ping Song ◽  
Wen-Yan Jin ◽  
Xiao Yang ◽  
Guang-Fu Dang
Keyword(s):  
Primary Open Angle Glaucoma ◽  
Open Angle Glaucoma ◽  
Cataract Extraction ◽  
Open Angle ◽  
Efficacy And Safety ◽  
Corrected Visual Acuity ◽  
Postoperative Time ◽  
Best Corrected Visual Acuity ◽  
Ab Interno ◽  
Time Point

Objective To investigate the efficacy and safety of ab interno trabeculotomy using the VISCO360® Viscosurgical System (Sight Sciences, Inc., Menlo Park, CA, USA) combined with cataract extraction in the treatment of primary open-angle glaucoma (POAG). Methods Patients with POAG who underwent ab interno trabeculotomy combined with cataract extraction were retrospectively analyzed. Best-corrected visual acuity (BCVA), intraocular pressure (IOP), the number of antiglaucomatous medications, and complications were recorded preoperatively and 1 week, 1 month, 3 months, 6 months, 1 year, and 2 years postoperatively. Results Thirty-four patients (40 eyes) with POAG were included in this study, including 20 men (22 eyes) and 14 women (18 eyes). Compared with the preoperative IOP, the postoperative IOP was significantly lower at each time point. The greatest reduction in IOP was 60.7% at 1 month after surgery. The BCVA was also significantly improved at each postoperative time point. The number of antiglaucomatous medications used by the patients was significantly lower postoperatively than preoperatively. Conclusion Ab interno trabeculotomy combined with cataract extraction is effective and safe for treatment of POAG.

scholarly journals Two-Year Outcomes of Ab Interno Trabeculectomy with the Trabectome for Chinese Primary Open Angle Glaucoma: A Retrospective Multicenter Study

2018 ◽  
Author(s):  
Yalong Dang ◽  
Xiao Wang ◽  
Yujie Cen ◽  
Ying Hong ◽  
Ping Huang ◽  
...  
Keyword(s):  
Primary Open Angle Glaucoma ◽  
Open Angle Glaucoma ◽  
Glaucoma Surgery ◽  
Safe Procedure ◽  
Open Angle ◽  
Trabectome Surgery ◽  
History Of ◽  
Ab Interno Trabeculectomy ◽  
Ab Interno

To evaluate the 2-year efficacy and safety of ab interno trabeculectomy with the Trabectome in Chinese primary open-angle glaucoma (POAG) patients. This was a multicenter, retrospective study and included POAG patients with or without visually-significant cataracts. The primary outcome was intraocular pressure (IOP) reduction. Secondary outcomes included reduction of glaucoma medications, surgical complications, and success at 2-years. Success was defined as: 1) IOP &lt; 21 mmHg and at least 20% IOP reduction from baseline after 3 months at any two consecutive visits, and 2) no additional glaucoma surgery required. A total of 42 patients were enrolled; thirteen had a history of failed glaucoma surgery. Twelve patients underwent Trabectome surgery combined with phacoemulsification while the remainder underwent Trabectome surgery alone. Overall, the mean preoperative IOP was 21.4&plusmn;1.23 mmHg. The Trabectome lowered IOP to 18.5&plusmn; 0.94 mmHg at 2 years (P&lt;0.05). The number of glaucoma medications also decreased from a baseline of 2.0&plusmn;0.9 to 1.2&plusmn; 0.21 at 2 years (P=0.04). The overall success was 78%, with patients undergoing combined surgery having a higher success than those with Trabectome surgery alone (100% vs. 76%). No major complications were seen. The Trabectome appears to be an efficient and safe procedure in Chinese POAG patients in the long-term.

scholarly journals Coarsened Exact Matching of Excisional to Plasma-Ablative Ab Interno Trabeculectomy

2021 ◽  
Author(s):  
Mohamad Dakroub ◽  
Raoul Verma-Fuehring ◽  
Alicja Strzalkowska ◽  
Jost Hillenkamp ◽  
Yousef Al Yousef ◽  
...  
Keyword(s):  
Primary Open Angle Glaucoma ◽  
Open Angle Glaucoma ◽  
Glaucoma Surgery ◽  
Group Comparison ◽  
Open Angle ◽  
Exact Matching ◽  
Coarsened Exact Matching ◽  
Ab Interno Trabeculectomy ◽  
One Year ◽  
Ab Interno

Purpose: To compare ab interno trabeculectomy by trabecular meshwork excision to plasma-mediated ablation in primary open-angle glaucoma. Methods: Retrospectively collected data of TrabEx+ (TEx, n=56) and Trabectome (T, n=99) were compared by coarsened exact matching to reduce confounding and matched based on baseline IOP and age. Primary outcomes were IOP and number of glaucoma medications. Complications and need for additional glaucoma surgery were assessed. Patients were followed for up to one year. Results: 53 TEx could be matched to T. Baseline IOP was 16.5&plusmn;4.6 mmHg in both; age was 73.7&plusmn;8.8 and 71.5&plusmn;9.9 years in TEx and T, respectively. TEx were taking more medications than T (p&lt;0.001). IOP was reduced to 14.8&plusmn;4.3 in TEx and to 13.4&plusmn;3.4 in T at 6 months, and to 14.9&plusmn;6.0 (p=0.13) in TEx and to 14.1&plusmn;3.8 mmHg (all p&lt;0.05) in T at 12 months. Medications were reduced at both 6 and 12 months (p&lt; 0.05). No differences were seen between TEx and T at 6 and 12 months. In TEx, only one serious complication occurred, and two patients required further glaucoma surgery. Conclusion: Although both groups had a baseline IOP considered low for ab-interno trabeculectomy, IOP and medications were reduced further at 6 and 12 months. IOP reduction did not reach significance in TEx at 12 months. The inter-group comparison did not reveal any significant differences. Both had a low complication rate.

One-year results of gonioscopy-assisted transluminal trabeculotomy: Evaluation of prognostic factors

2020 ◽  
pp. 112067212090871 ◽  
Author(s):  
Mehmet Ozgur Cubuk ◽  
Erkan Unsal
Keyword(s):  
Intraocular Pressure ◽  
Success Rate ◽  
Open Angle Glaucoma ◽  
Multivariate Logistic Regression Analysis ◽  
Cataract Extraction ◽  
Glaucoma Surgery ◽  
Open Angle ◽  
Multivariate Logistic Regression ◽  
Surgical Success ◽  
Corrected Visual Acuity

Purpose: To present the results and complications of gonioscopy-assisted transluminal trabeculotomy in adults with open-angle glaucoma using our different approaches during and after surgery. Method: A retrospective comparative study was designed. Patients with regular 12-month follow-up history were included. Two groups were defined: group 1 comprised patients with open-angle glaucoma who underwent gonioscopy-assisted transluminal trabeculotomy surgery alone; group 2 included patients with open-angle glaucoma who underwent combined gonioscopy-assisted transluminal trabeculotomy and cataract extraction. A 30% reduction in preoperative intraocular pressure or postoperative intraocular pressure below 18 mm Hg was considered as surgical success. The success rate, alteration in intraocular pressure, alteration in best-corrected visual acuity, alteration in the need for antiglaucomatous medications, surgical complications, and the need for additional glaucoma surgery were evaluated and compared between the groups. Multivariate logistic regression analysis was used to show the association between the surgical success and possible prognostic factors. Results: A total of 37 eyes fulfilled the inclusion criteria and were analyzed in this study. An overall mean decrease in intraocular pressure of 11.3 ± 9.3 mm Hg was shown at 12 months (p < 0.001). The medication-free surgical success rate was 37.8% (14/37), and the surgical success rate with medication was 91.8% (33/37) at 12 months. Surgical outcomes were similar between patients who underwent gonioscopy-assisted transluminal trabeculotomy alone and those who had combined gonioscopy-assisted transluminal trabeculotomy and cataract extraction (p > 0.05). The most common postoperative complication was hyphemia (89.1%). There were no complications that threatened best-corrected visual acuity. Multivariate logistic regression analysis revealed one significant association between the presence of blood in Schlemm’s canal and surgical success (odds ratio = 1.47; 95% confidence interval = 1.25–1.68; p = 0.047). Conclusion: This study showed that the gonioscopy-assisted transluminal trabeculotomy procedure is an effective and minimally invasive form of glaucoma surgery. Its effect was related to intraoperative blood in Schlemm’s canal.

scholarly journals Ab Interno vs. Ab Externo Microcatheter-Assisted Circumferential Trabeculotomy in Treating Patients With Primary Open-Angle Glaucoma

2021 ◽  
Vol 8 ◽  
Author(s):  
Weijia Zhang ◽  
Yiwei Wang ◽  
Chen Xin ◽  
Yang Sun ◽  
Kai Cao ◽  
...  
Keyword(s):  
Primary Open Angle Glaucoma ◽  
Open Angle Glaucoma ◽  
Case Series ◽  
Open Angle ◽  
Success Rates ◽  
Criterion A ◽  
The Mean ◽  
Group 2 ◽  
Ab Interno ◽  
Group 1

Background: Circumferential trabeculotomy have evolved from ab externo to ab interno approach. Both procedures may lower IOP, but it is unclear which maybe a superior approach.Purpose: To compare the outcomes of ab interno and ab externo circumferential trabeculotomy in patients with primary open-angle glaucoma.Design: Retrospective, comparative case series.Participants: Primary open angle glaucoma patients undergoing ab interno (40 patients in Group 1) or ab externo (54 patients in Group 2) circumferential trabeculotomy, with about one half of them having prior incisional glaucoma surgery.Methods: Outcomes including intraocular pressure (IOP), glaucoma medications and surgical complications were analyzed.Main Outcome Measures: IOP, medications and surgical success defined as an IOP of ≤ 21 mmHg and a reduction of IOP ≥20% from baseline (criterion A) or IOP ≤ 18 mmHg and a reduction of IOP 20% from baseline (criterion B) with (qualified success) or without (complete success) medications.Results: At 1 year, IOP decreased by 37.1% (26.0–14.8 mmHg) in Group 1 and 39.5% (28.5–15.1 mmHg) in Group 2. Medications decreased from 3.5 in Group 1 and 3.6 in Group 2 pre-operatively to 0.6 ± 1.0 and 0.3 ± 0.6 post-operatively, respectively. Success rates did not differ significantly between groups based on criterion A (complete and qualified success: 68.7 and 81.9% in Group 1, and 75.3 and 90.4% in Group 2, respectively) or criterion B (complete and qualified success: 58.2 and 79.3%in Group 1, and 69.5 and 88.4% in Group 2, respectively). For eyes with prior filtration surgeries, the mean percent reduction of IOP (41.7 ± 32.7% in Group 1, 39.7 ± 27.8% in Group 2, P = 0.724) and the mean medication reduction (2.9 ± 1.6 in Group 1, 3.4 ± 1.0 in Group 2, P = 0.454) were not significantly different.Conclusions: Ab interno circumferential trabeculotomy achieved comparable outcomes to ab externo trabeculotomy and may be an effective surgical option for patients with primary open-angle glaucoma.

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