- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03141931
The Effects of Dietary Supplementation With Omega-3 Fatty Acids on Symptoms of Dry Eye
May 27, 2020 updated by: Jacqueline Tan-Showyin, The University of New South Wales
The Effects of Dietary Supplementation With a Combination of Flaxseed Oil, Borage Oil and Fish Oil Omega-3 Fatty Acids on Ocular Comfort Including Symptoms of Dry Eye
The aim of this study is to compare ocular symptoms and signs when the test nutraceutical formulation (combination of flaxseed oil, borage oil and fish oil omega-3 fatty acids) is consumed daily over a 3 month period, with a control capsule that contains polyethylene glycol (PEG), oleic acid and propylene glycol, which are found in many pharmaceutical products and are generally considered to be biologically inert and safe.
There is good evidence that the consumption of oily fish has a protective effect against dry eye, and other studies have provided evidence of the beneficial effect of supplementation with omega-3 essential fatty acids in the treatment of dry eye disease.
However, there have been limited well designed clinical trials investigating the potential for nutraceutical dietary supplementation to impact ocular comfort.
To date, no controlled, randomised clinical trials have been conducted to evaluate the test nutraceutical formulation.
Therefore, the purpose of this study is to conduct a randomized, placebo-controlled, double-masked study to investigate the effects of dietary supplementation with a combination of flaxseed oil, borage oil and fish oil omega-3 fatty acids on ocular comfort including signs and symptoms of dry eye.
Study Overview
Status
Completed
Conditions
Intervention / Treatment
Detailed Description
This study will be a prospective, randomised, placebo-controlled, double masked study conducted over a 3-month period.
One hundred and thirty-eight (138) participants who meet the inclusion / exclusion criteria and give informed consent will be randomised to either the test capsules containing a combination of flaxseed oil, borage oil and fish oil omega-3 fatty acids or placebo capsules, identical in appearance, containing polyethylene glycol, oleic acid and propylene glycol (found in many pharmaceutical products and considered to be biologically inert and safe) to be taken by mouth three times daily for 40 days, and then twice daily thereafter for approximately 50 days.
Every effort will be made to stratify enrolment by disease severity to ensure participants with mild, moderate and severe dry eye are represented in the study population.
Stratification will be in a 2:2:1 fashion i.e.
OSDI score >12 (55 participants), OSDI score >20 (55 participants) and OSDI score >45 (28 participants).
Participants will be stratified according to dry eye severity prior to randomisation.
There will be a total of 3 scheduled study visits over a period of approximately 3 months - Day 1, 1 month and 3 months.
Ocular comfort and symptoms of dry eye will be assessed via questionnaires.
The tear film and ocular surface will be assessed using specialised instruments including the slit lamp biomicroscope, Lipiview Ocular Surface Interferometer, Vapometer and Oculus Keratograph 5M, and stains.
Safety will be assessed through measurement of vision, ocular redness and evaluation of the ocular surface using the slit lamp biomicroscope.
Those participants who meet the eligibility criteria will be randomly allocated to either the test or control capsules.
An adequate supply of capsules will be dispensed to last until the next Participants will be instructed to ingest one capsule three times daily with meals for 40 days, and then two times daily until their final 3 month study visit.
Study Type
Interventional
Enrollment (Actual)
119
Phase
- 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
-
-
New South Wales
-
Sydney, New South Wales, Australia, 2052
- School of Optometry and Vision Science
-
-
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
Ages Eligible for Study
16 years to 98 years (Adult, Older Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Description
Inclusion Criteria:
- Able to read and comprehend English and give informed consent as demonstrated by signing a record of informed consent;
- Be at least 18 years old;
- Have symptoms of ocular discomfort as measured with the Ocular Surface Disease Index (OSDI) score of >12 at the Baseline visit;
- Willing to comply with the dosage and study visit schedule as directed by the investigator;
- No contact lens wear in the last 30 days and willing to refrain from contact lens wear for the duration of the study;
- No planned changes to diet and willing not to substantially alter their usual diet for the duration of the study, including their typical intake of fish;
- Willingness to notify the study investigator if instructed to alter their diet by health/medical practitioner;
- Willing to continue using any artificial tear supplements at the same frequency throughout the study, as used prior to the study
- Have health and ocular health findings which would not prevent the participant from safely ingesting dietary supplementation with combination omega oils
Exclusion Criteria:
- Any systemic disease that would preclude participants from safely ingesting dietary supplementation with combination omega oils;
- Self-reported allergy/sensitivity to any of the study product ingredients;
- Use of any polyunsaturated fatty acid-containing dietary supplements (such as fish oil, evening primrose oil, linseed oil) up to 12 weeks prior to the start of the study;
Use of any of the following medications (including steroids) up to 12 weeks prior to start of the study or during the course of the study:
- Ocular medication, category S3 and above;
- Any systemic or topical medications that will affect ocular physiology e.g. anti-acne medications such as Roaccutane and corticosteroid or immunosuppressant medications such as Hydrocortisone, Prednisolone and antihistamine medications such as Claritine;
- Any systemic disease that may affect ocular health e.g. Graves disease, and auto-immune diseases such as ankolysing spondylitis, multiple sclerosis and systemic lupus erythematosis;
- Epilepsy or history of migraines exacerbated by flashing, strobe-like lights;
- Eye surgery within 6 months immediately prior to enrolment for this study;
- Rigid or soft contact lens wearer, including orthokeratology in the last 30 days;
- Previous corneal refractive surgery;
- Pregnancy or breastfeeding.
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: Double
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Supplement
Combination of flaxseed oil, borage oil and fish oil omega-3 fatty acids
|
Concentrated Omega-3 Triglycerides-fish 332 mg Equiv.
Eicosapentaenoic Acid (EPA) 134 mg Equiv.
Docosahexaenoic Acid (DHA) 66.8 mg Flax Seed Oil (Linseed Oil) 334 mg Equiv.
Oleic acid 58.5 mg Equiv.
Linoleic acid 58.5 mg Equiv.
Linolenic acid 192 mg Borago officinalis seed oil fixed (Borage) 434 mg Equiv.
gamma-Linolenic acid 95.5 mg
|
Placebo Comparator: Placebo
Polyethylene glycol, Oleic acid, Propylene glycol
|
polyethylene glycol (500mg), oleic acid (659mg) and propylene glycol (115mg)
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Subjective Ocular Symptoms
Time Frame: 3 months
|
Measured using the Ocular Surface Disease Index questionnaire.
Ocular surface disease index is assessed on a scale of 0 to 100 with higher score representing greater disability.
Scores can range from 10 to 100.
|
3 months
|
Subjective Ocular Comfort
Time Frame: 3 months
|
Measured using the Ocular Comfort Index questionnaire.
Ocular comfort index questionnaire score range from 0 to 72.
Lowest slow indicates better subjective symptoms.
|
3 months
|
Subjective Ocular Dryness
Time Frame: 3 months
|
Measured using the Dry Eye Questionnaire 5. Dry eye questionnaire 5 score ranges from 0 to 22. Lower score represents better outcome. |
3 months
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Non-invasive Tear Film Break-up Time
Time Frame: 3 months
|
Measured in seconds using the Oculus Keratograph.
Higher value represents better outcome.
|
3 months
|
Tear Evaporation Rate
Time Frame: 3 months
|
Measured in g.m^2.h using the Vapometer
|
3 months
|
Tear Meniscus Height
Time Frame: 3 months
|
Measured in millimeters using the Oculus Keratograph 5M
|
3 months
|
Tear Volume
Time Frame: 3 months
|
Measured in millimeters using phenol red thread tests
|
3 months
|
Tear Film Lipid Layer Thickness
Time Frame: 3 months
|
Measured in nanometers using the LipiView ocular surface interferometer
|
3 months
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Investigators
- Principal Investigator: Jacqueline Tan-Showyin, PhD, University of New South Wales
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)
August 21, 2017
Primary Completion (Actual)
October 19, 2018
Study Completion (Actual)
October 19, 2018
Study Registration Dates
First Submitted
February 6, 2017
First Submitted That Met QC Criteria
May 2, 2017
First Posted (Actual)
May 5, 2017
Study Record Updates
Last Update Posted (Actual)
June 11, 2020
Last Update Submitted That Met QC Criteria
May 27, 2020
Last Verified
May 1, 2020
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- SOVS2016-045
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
No
IPD Plan Description
Any data included in reports, publications or presented at meetings will be provided in the form of group responses or study identity numbers, such that the participants cannot be identified.
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
No
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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