Study of OMNI Surgical System and iStent for Eyes With OAG (Trident)

October 14, 2025 updated by: Sight Sciences, Inc.

A Prospective, Randomized, Multicenter Study To Compare The Safety And Effectiveness Of The OMNI® Surgical System And The iStent Inject In Pseudophakic Eyes With Open Angle Glaucoma. The TRIDENT European Trial

First, to compare safety and effectiveness outcomes for canaloplasty and trabeculotomy using the OMNI Surgical System to implantation of the iStent inject in lowering intraocular pressure (IOP) in pseudophakic eyes with open angle glaucoma (OAG), and second, to compare safety and effectiveness outcomes for canaloplasty alone (using the OMNI Surgical System)to implantation of the iStent Inject in lowering IOP in pseudophakic eyes with OAG.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Terminated

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

A multicenter, prospective, parallel group study planned to randomize 459 subjects to either 1)canaloplasty + trabeculotomy with the OMNI, 2)canaloplasty alone with the OMNI, or 3)iStent inject in an equal allocation ratio (1:1:1); The study includes baseline and terminal (Month 12) washout. Up to 26 centers in the UK and EU were planned to participate.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
10

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Germany
      • Frankfurt, Germany
        • BurgerHospital
  • Spain
      • Barcelona, Spain, 08022
        • Institut Catala de Retina (ICR)
      • Valencia, Spain, 46026
        • Universidad Complutense de Madrid
      • Zaragoza, Spain, 50009
        • Paseo Isabel la Católica 1-3. Edificio general Hospital Miguel Servet. Planta calle
  • United Kingdom
      • Manchester, United Kingdom, M13
        • Manchester Royal Eye Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

14 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. Male or female subjects, 18 years or older
  2. Pseudophakic
  3. Diagnosis of open angle glaucoma (OAG)
  4. On 1-5 ocular hypotensive medications

Exclusion Criteria:

  1. Any of the following prior treatments for glaucoma:

    • Suprachoroidal stent (e.g. Cypass, iStent Supra)
    • Laser trabeculoplasty ≤ 8 weeks prior to Baseline visit with a MIGS or other glaucoma device including but not limited to iStent, iStent inject, Hydrus, CyPass
    • Trabeculectomy or other bleb forming procedure including Xen, PreserFlo, Express, glaucoma draining device/valve
    • Prior canaloplasty, goniotomy, or trabeculotomy including procedures with GATT, Kahook Dual Blade, iTrack, Trabectome
    • Ciliary ablation procedures including Endocyclophotocoagulation (ECP), Cyclophotocoagulation (G probe), Micropulse laser, or high intensity focused ultrasound (HIFU)
  2. Any other form of glaucoma other than OAG
  3. Concurrent ocular pathology or systemic medical condition which, in the Investigator's judgment, would either place the subject at increased risk of complications, contraindicate surgery, place the subject at risk of significant vision loss during the study period (e.g., wet AMD, corneal edema, Fuch's dystrophy, active intraocular infection or inflammation within 30 days prior to Screening Visit, etc.), or interfere with compliance to elements of the study protocol (e.g., returning to investigator's office for follow-up visits).
  4. Women of childbearing potential if they are currently pregnant or intend to become pregnant during the study period; are breast-feeding; or are not in agreement to use adequate birth control methods to prevent pregnancy throughout the study.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Active Comparator: Ab-interno canaloplasty and trabeculotomy using the OMNI Surgical System
Sequential canaloplasty (up to 360 degrees) and trabeculotomy (up to 360 degrees)
Device: Canaloplasty and trabeculotomy with the OMNI system.
Ab-interno canaloplasty (360 degrees) and up to 360 degrees trabeculotomy
Active Comparator: Ab-interno canaloplasty (360 degrees) using the OMNI Surgical System
Canaloplasty alone (up to 360 degrees)
Device: Canaloplasty
Ab-interno canaloplasty (360 degrees) using the OMNI
Active Comparator: Ab-interno implantation of iStent inject (2 microstents)
Implantation of trabecular micro bypass stents as per manufacturer's instructions.
Device: iStent inject
Ab-interno implantation of iStent inject (2 microstents)

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Mean Change in Unmedicated DIOP From Baseline at the 12-month Postoperative Examination
Time Frame: 12 months
Mean change in unmedicated DIOP from baseline at the 12-month postoperative examination is the mean of the difference between the baseline DIOP and the Month 12 DIOP for each subject. Baseline and Month 12 DIOP are measured after appropriate washout of any glaucoma medications.
12 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Sight Sciences, Inc.

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: Jaime Dickerson, PhD, Sight Sciences, Inc.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
January 11, 2022

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
November 18, 2022

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
November 18, 2022

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
December 1, 2020

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
December 1, 2020

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
December 8, 2020

Study Record Updates

Last Update Posted (Estimated)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
October 27, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
October 14, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
September 1, 2025

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 07062

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

Yes

product manufactured in and exported from the U.S.

Yes

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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