- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03529591
Is the Reduction in IOP After Treatment of 180 Degrees Equivalent to Treatment of 360 Degrees With SLT? (SLT)
Is the Reduction in Intraocular Pressure Achieved With Treatment of 180 Degrees Equivalent to Treatment of 360 Degrees With Selective Laser Trabeculoplasty (SLT)?
The study is a prospective randomised controlled intervention comparing the intraocular pressure outcomes following Selective Laser Trabeculoplasty (SLT) treatment of 180 degrees SLT compared to 360 degrees in treatment naive patients with bilateral ocular hypertension or primary open angle glaucoma . The right eye of each patient will be randomised to receive either 180 or 360 degrees SLT, while the fellow eye will receive the opposite treatment. That is, if the right eye is randomised to 180 degrees SLT, then the left eye will receive 360 degrees SLT.
The primary objective is to assess the mean difference in intraocular pressure between two eyes of each participant. The mean difference in IOP will be assessed at two weeks and at one, three and six months after treatment with SLT.
Secondary outcomes include assessing whether there are differences in visual acuity, anterior chamber inflammation, visual field progression and the rate of complications between the two eyes treated with either 180° or 360° of selective laser trabeculoplasty. The complications assessed are those published in the literature including: pain, blurred vision, anterior chamber inflammation, IOP spike, and hyphaema. Additionally, participants will be given the opportunity to report symptoms experienced through free text.
Study Overview
Status
Intervention / Treatment
Detailed Description
Potential patients will be identified by the Principal Investigator during a clinic visit. Pre-screening criteria is carried out by the co-investigator or the research co-ordinator. General eligibility criteria, inclusion and exclusion criteria are applied. The Research Co-ordinator approaches the patient and the SLT laser study is discussed with the patient. The patient is provided the Information Sheet and advised to contact the Research Coordinator if they wish to proceed. Informed consent is obtained if the patient wishes to proceed. Baseline data is collected and the right eye is randomised with the fellow eye to receive non randomised treatment.
SLT is performed in both eyes (180 degrees in 1 eye + 360 degrees in the fellow eye) during an office visit. IOP in both eyes is checked and recorded at one hour post treatment.
The patient returns for follow up at two weeks post SLT treatment visit. A complete ocular examination, including IOP, is undertaken. Complications and adverse events are assessed and recorded. Any change to eyedrops is recorded. Patients return at one, three and six months for review, and the same assessment as above is undertaken at each visit.
Enrolling is complete when 48 patients are enrolled. Patients are advised enrolling is complete.
Statistical analysis is undertaken to assess the mean change in IOP between the two treatments. Complications and adverse events are each treatment group are recorded. The study is submitted for publication and written communication is provided to each enrolled patient.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
-
-
Ontario
-
London, Ontario, Canada, N6A 4V2
- St. Joseph's Health Care London
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Age greater than 18 years
- IOP greater than 21mmHg (millimetres mercury)
- Glaucoma suspect
- Open angle glaucoma - primary or secondary
- Bilateral disease
- History of previous uncomplicated cataract surgery
- Willingness to be treated with selective laser trabeculoplasty
- Willingness to participate in the study, along with signed written consent
Exclusion Criteria:
- Age younger than 18 years
- Paediatric glaucoma
- Narrow or closed angles on gonioscopy
- History of ocular trauma
- Active or history of uveitis
- History of amblyopia
- History of, or, current steroid use - ocular, periocular or systemic
- History of any prior ocular laser - Argon laser trabeculoplasty (ALT), SLT or retinal laser
- Monocular patient
- Active proliferative diabetic retinopathy
- History of complicated cataract surgery
- Recent cataract surgery - within the last six months
- Unable to consent for treatment
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Double
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: 180 deg selective laser trabeculoplasty
The right eye of a patient is randomized to be treated with either 180 or 360 degrees selective laser trabeculoplasty (SLT).
The fellow eye is treated with the opposite treatment, that is, if the right eye is treated with 180 degrees SLT, the left eye is treated with 360 degrees SLT.
Intraocular pressure (IOP) response is assessed at 2 weeks, one, three and six months post treatment and compared to the alternative treatment arm, the fellow eye.
|
In this study, treatment naive patients with bilateral ocular hypertension or primary open angle glaucoma are treated with 180 degrees SLT in one eye and 360 degrees SLT in the contralateral eye.
The primary outcome measure is assessing the response to SLT in both eyes and comparing the intraocular pressure outcomes between the two eyes of each patient.
Other Names:
In this study, treatment naive patients with bilateral ocular hypertension or primary open angle glaucoma are treated with 180 degrees SLT in one eye and 360 degrees SLT in the contralateral eye.
The primary outcome measure is assessing the response to SLT in both eyes and comparing the intraocular pressure outcomes between the two eyes of each patient.
|
Active Comparator: 360 deg selective laser trabeculoplasty
The right eye of a patient is randomized to be treated with either 180 or 360 degrees selective laser trabeculoplasty (SLT).
The fellow eye is treated with the opposite treatment, that is, if the right eye is treated with 180 degrees SLT, the left eye is treated with 360 degrees SLT.
Intraocular pressure (IOP) response is assessed at 2 weeks, one, three and six months post treatment and compared to the alternative treatment arm, the fellow eye.
|
In this study, treatment naive patients with bilateral ocular hypertension or primary open angle glaucoma are treated with 180 degrees SLT in one eye and 360 degrees SLT in the contralateral eye.
The primary outcome measure is assessing the response to SLT in both eyes and comparing the intraocular pressure outcomes between the two eyes of each patient.
Other Names:
In this study, treatment naive patients with bilateral ocular hypertension or primary open angle glaucoma are treated with 180 degrees SLT in one eye and 360 degrees SLT in the contralateral eye.
The primary outcome measure is assessing the response to SLT in both eyes and comparing the intraocular pressure outcomes between the two eyes of each patient.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Intraocular pressure response (physiological parameter)
Time Frame: Six months
|
Is there a difference in the intraocular pressure response following SLT treatment of 180 degrees compared to SLT treatment of 360 degrees, in two eyes of the same patient treatment?
|
Six months
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
The number of participants with treatment-related adverse events will be assessed by CTCAE v4.0.
Time Frame: Six months
|
The adverse events/complications in eyes treated with 180 degrees SLT compared to 360 degrees SLT will be assessed and analysed.
|
Six months
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Tony Lin, MD, Ivey Eye Institute, St Joseph's Healthcare, Western University, London, Ontario, Canada
Publications and helpful links
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 111317
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
product manufactured in and exported from the U.S.
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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