- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT05800353
Nd:YAG Laser Vitreolysis for Symptomatic Vitreous Floaters (VVF)
The goal of this clinical trial is to compare in the efficacy and safety of Nd:YAG laser vitreolysis for symptomatic vitreous floaters. The main question it aims to answer are:
• examine the efficacy and safety in treating early onset of vitreous floaters (Weiss ring) using Nd:YAG laser vitreolysis.
Participants with symptomatic floaters for one month will be randomly divided into two groups:early treatment group and delayed treatment group. Participants in the early treatment group will receive a YAG laser vitreolysis immediately and a sham laser treatment three months later, while participants in the delayed treatment group will receive a sham laser treatment immediately and a YAG laser vitreolysis three months late.
Researchers will compare the two groups to see the efficacy and safety of early YAG laser vitreolysis for symptomatic vitreous floaters.
Study Overview
Study Type
Enrollment (Estimated)
Phase
- Not Applicable
Contacts and Locations
Study Contact
- Name: Hangshuai Zhou
- Phone Number: +8618867940019
- Email: 350589935@qq.com
Study Locations
-
-
Zhejiang
-
Dongyang, Zhejiang, China, 322100
- Recruiting
- Dongyang People's Hospital
-
Contact:
- Hangshuai Zhou
- Phone Number: +8618867940019
- Email: 350589935@qq.com
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
- Child
- Adult
- Older Adult
Accepts Healthy Volunteers
Description
Inclusion Criteria:
- Self-rating of visual disturbance by the floaters must be at least 4 on a 0-10 scale, with 0 being no symptoms to 10 being debilitating symptoms.
- Symptomatic Weiss ring (PVD) must be at least 2mm away from the retina and 5 mm from the posterior lens capsule of the crystalline lens, as measured on B-scan. For pseudophakic patients, there is no minimum required distance from the intraocular lens.
- Able to position for the YAG laser procedure.
- Accept the risks of YAG laser including but not limited to retinal detachment, intraocular hemorrhage, retinal damage, cataract formation, optic nerve damage, inflammation, and irreversible loss of vision.
- Willing and able to comply with clinic visits and study-related procedures
- If the patient has two symptomatic eyes, only one eye can be randomized and included in the study.
- Provide signed informed consent
Exclusion Criteria:
- History of retinal tear, retinal detachment, or uveitis in the study eye
- History of diabetic retinopathy, macular edema, retinal vein occlusion, or aphakia in the study eye
- History of glaucoma or high intraocular pressure defined as having a history of glaucoma surgery or currently taking two or more topical glaucoma medications in the study eye
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Triple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: early treatment group
Participants in the early treatment group will receive a YAG laser vitreolysis immediately and a sham laser treatment three months later.
|
A Karickoff lens with goniosol will be used to perform the YAG vitreolysis. The number of shots will be determined at the discretion of the treating physician. A focus offset may be used at investigator discretion. Single shot mode will be used. The maximum energy per pulse will be 7 mJ. The endpoint of treatment is the vaporization of the Weiss ring into gas, as well as the disruption of it into smaller fragments as well as any other vitreous opacities deemed visually significant by the treating physician. Sham laser treatment will be applied under the same procedure used for laser treatment but by turning the laser power down to 0.3 mJ and using a separate lens covered by a filter that absorbs the power, so no laser enters the eye.
Other Names:
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Experimental: delayed treatment group
Participants in the delayed treatment group will receive a sham laser treatment immediately and a YAG laser vitreolysis three months late.
|
A Karickoff lens with goniosol will be used to perform the YAG vitreolysis. The number of shots will be determined at the discretion of the treating physician. A focus offset may be used at investigator discretion. Single shot mode will be used. The maximum energy per pulse will be 7 mJ. The endpoint of treatment is the vaporization of the Weiss ring into gas, as well as the disruption of it into smaller fragments as well as any other vitreous opacities deemed visually significant by the treating physician. Sham laser treatment will be applied under the same procedure used for laser treatment but by turning the laser power down to 0.3 mJ and using a separate lens covered by a filter that absorbs the power, so no laser enters the eye.
Other Names:
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Subjective improvement in floater symptoms
Time Frame: 3 Months
|
Doctor/Surveyor: Hi there, have you experienced any visual disturbances such as floaters?
On a scale of 0 to 10, with 0 meaning no symptoms and 10 meaning symptoms that significantly impact your daily life, how would you rate the severity of your visual disturbance caused by the floaters?
|
3 Months
|
Visual Functioning Questionnaire-25
Time Frame: 3 Months
|
Mean change in the National Eye Institute Visual Functioning Questionnaire-25 (NEI VFQ-25).
The Visual Functioning Questionnaire-25 (VFQ-25) is a self-reported questionnaire designed to measure a patient's visual function and its impact on their quality of life.
The VFQ-25 consists of 25 items, which assess various domains of vision-related quality of life, such as general vision, near and distance activities, driving, social functioning, and mental health.
The minimum value for the VFQ-25 is 0, which represents the worst possible visual function and quality of life, while the maximum value is 100, indicating the best possible visual function and quality of life.
Higher scores on the VFQ-25 indicate a better outcome, indicating that the patient has better visual function and quality of life.
|
3 Months
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Qualitative changes through OCT and fundus photography
Time Frame: 3 Months
|
The objective evaluation of the improvement of vitreous floaters through OCT and fundus photography can be divided into five levels: worse, no change, mild improvement, significant improvement, and complete improvement.
|
3 Months
|
Incidence and severity of ocular and systemic adverse events
Time Frame: 3 Months
|
Incidence rates of retinal tears, retinal hemorrhage, retinal detachment, lens damage, and other related adverse events.
|
3 Months
|
Collaborators and Investigators
Sponsor
Investigators
- Study Chair: Guangjin Zhao, Dongyang People's Hospital
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Estimated)
Study Completion (Estimated)
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
Keywords
Other Study ID Numbers
- DongyangPH
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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