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Trial details imported from ClinicalTrials.gov
For full trial details, please see the original record at
https://clinicaltrials.gov/study/NCT03622619
Registration number
NCT03622619
Ethics application status
Date submitted
6/08/2018
Date registered
9/08/2018
Titles & IDs
Public title
The Effect of Manuka Eye Drops on Tear Film Properties
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Scientific title
The Effect of Manuka Eye Drops on Tear Film Properties
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Secondary ID [1]
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SOVS2018-501
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Universal Trial Number (UTN)
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Trial acronym
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
Dry Eye Syndrome
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Condition category
Condition code
Eye
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Diseases / disorders of the eye
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Intervention/exposure
Study type
Interventional
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Description of intervention(s) / exposure
Other interventions - Optimel Antibacterial Manuka+ Dry Eye Drops
Other interventions - Systane Ultra Lubricating Eye Drops
Experimental: Manuka eye drops -
Active comparator: Systane Ultra -
Other interventions: Optimel Antibacterial Manuka+ Dry Eye Drops
Leptospermum sp Honey 165mg/g
Other interventions: Systane Ultra Lubricating Eye Drops
Polyethylene glycol 400 0.4% and propylene glycol 0.3%
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Intervention code [1]
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Other interventions
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Comparator / control treatment
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Control group
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Outcomes
Primary outcome [1]
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A Measurable Difference in Tear Lipid Layer Thickness After 4 Weeks of Daily Use
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Assessment method [1]
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The primary endpoint is a measurable difference in tear lipid layer thickness between Optimel Manuka eye drops and Systane Ultra eye drops after 4 weeks of daily use. Tear film inferior lipid layer thickness (LLT; nm) is measured using the LipiView II (Johnson and Johnson Vision, USA). The participant's eye is positioned in front of an illumination source that is directed toward the tear film on the corneal surface. The camera records a 20-second video of the tear film interference and subsequently displays a value in interferometric colour units (ICU), where 1 ICU approximates 1nm of lipid layer thickness.
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Timepoint [1]
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28 days
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Primary outcome [2]
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A Measurable Difference in Tear Evaporation Rate After 4 Weeks of Daily Use.
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Assessment method [2]
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A measurable difference in Tear evaporation rate between Optimel Manuka eye drops and Systane Ultra eye drops after 4 weeks of daily use. Measured using a Modified Vapometer. The Modified Vapometer is a closed chamber device which is used for measuring transepidermal water loss. Participants will be seated upright on a chair and provided with a distance fixation target. To minimize the effect of skin evaporation, petroleum jelly (Vaseline, http://www.unilever.com.au/brands-in-action/detail/Vaseline/299339/) will be applied over the upper eyelid and the surrounding areas. The VapoMeter will then be placed over the eye and a non-invasive measurement of tear evaporation will be taken within 10 s. Participants will be instructed not to blink during open eye measurement and to maintain a normal straight gaze at the fixation target. Evaporation rates with the eyes closed will also be taken, in order to account for the skin evaporation from eyelids and surrounding skin tissue.
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Timepoint [2]
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28 days
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Primary outcome [3]
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A Measurable Difference in Fluorescein Tear Break-up Time After 4 Weeks of Daily Use
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Assessment method [3]
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A measurable difference in fluorescein tear break-up time between Optimel Manuka eye drops and Systane Ultra eye drops after 4 weeks of daily use. Fluorescein tear break-up time (TBUT; sec) (Opti-Strip-FL, Optimed, Lane Cove West, NSW, Australia) was measured viewed with a yellow Wratten filter (No. 12, Kodak) and cobalt light of the slit lamp biomicroscope. Three consecutive TBUT measurements for each eye were taken by a single masked investigator.
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Timepoint [3]
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28 days
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Secondary outcome [1]
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A Measurable Difference in Subjective Symptoms After 4 Weeks of Daily Use
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Assessment method [1]
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A measurable difference in subjective symptoms between Optimel Manuka eye drops and Systane Ultra eye drops after 4 weeks of daily use. Subjective symptoms is measured using an visual analogue scale ranging from 0 to 100, with higher scores meaning worse outcome. Participants are asked to visually represent their symptom severity by marking a dot on a line ten centimetres in length. These are then measured using a ruler to the nearest 0.5mm and given a score from zero to 100, with zero indicative of no symptoms and 100 suggesting maximum symptom severity
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Timepoint [1]
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28 days
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Eligibility
Key inclusion criteria
* Able to read and comprehend English and give informed consent as demonstrated by signing a record of informed consent;
* General population aged 18 years and over;
* In good general health;
* Subjectively experiencing dry eye symptoms (e.g. burning, irritation, and discomfort due to dryness of the eye or exposure to wind or sun). Participants will be selected based on a minimum OSDI score of 13 points (1).
* Willing to discontinue CL wear for 1 week before first visit and continue to do so until the conclusion of the study;
* Participant is willing to discontinue their use of any previous conventional dry eye treatment method commenced before the study throughout the study;
* Willing to comply with the dosage and study visit schedule as directed by the investigator;
* 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, green tea or oral supplements known to have anti-inflammatory properties;
* Willingness to notify the study investigator if instructed to alter their diet by health/medical practitioner.
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Minimum age
18
Years
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Maximum age
No limit
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Sex
Both males and females
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Can healthy volunteers participate?
No
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Key exclusion criteria
* Allergy to benzoic acid preservatives;
* Allergy to honey products;
* Active anterior eye disease/ infection, inflammation/allergy that requires ocular medical treatment;
* Eye injury or surgery in the past 6 months including chemical burns, penetrating injuries, traumatic iritis, orbital fractures, laser surgery, strabismus surgery, cataract or any other intraocular surgeries;
* Soft contact lens, rigid gas permeable, orthokeratology lens wearer within one week prior to the study and during 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.
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Study design
Purpose of the study
Treatment
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Allocation to intervention
Randomised controlled trial
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Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
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Methods used to generate the sequence in which subjects will be randomised (sequence generation)
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Masking / blinding
Blinded (masking used)
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Who is / are masked / blinded?
The people receiving the treatment/s
The people analysing the results/data
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Intervention assignment
Parallel
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Other design features
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Phase
NA
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Type of endpoint/s
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Statistical methods / analysis
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Recruitment
Recruitment status
Completed
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Data analysis
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Reason for early stopping/withdrawal
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Other reasons
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Date of first participant enrolment
Anticipated
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Actual
13/08/2018
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Date of last participant enrolment
Anticipated
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Actual
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Date of last data collection
Anticipated
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Actual
30/10/2018
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Sample size
Target
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Accrual to date
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Final
46
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Recruitment in Australia
Recruitment state(s)
NSW
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Recruitment hospital [1]
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School of Optometry and Vision Science - Sydney
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Recruitment postcode(s) [1]
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2050 - Sydney
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Funding & Sponsors
Primary sponsor type
Other
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Name
The University of New South Wales
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Address
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Country
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Ethics approval
Ethics application status
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Summary
Brief summary
Traditionally, Manuka honey has been used to combat against bacteria and reduce inflammation (the body's way of reacting to infection, irritation or other injury). Due to the inflammatory nature of dry eye, Manuka eye drops show promise as a treatment for dry eye disease. The aim of this research is to compare the effects of two over the counter eye drops that are used to treat dry eye conditions over a one month period.
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Trial website
https://clinicaltrials.gov/study/NCT03622619
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Trial related presentations / publications
Tan J, Jia T, Liao R, Stapleton F. Effect of a formulated eye drop with Leptospermum spp honey on tear film properties. Br J Ophthalmol. 2020 Oct;104(10):1373-1377. doi: 10.1136/bjophthalmol-2019-315160. Epub 2020 Jan 16.
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Public notes
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Contacts
Principal investigator
Name
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Jacqueline Tan, PhD
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Address
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University of New South Wales
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Country
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Phone
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Fax
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Email
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Contact person for public queries
Name
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Address
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Country
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Phone
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Fax
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Email
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Contact person for scientific queries
Data sharing statement
Will individual participant data (IPD) for this trial be available (including data dictionaries)?
No
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No/undecided IPD sharing reason/comment
Study results will be made available in the form of summaries
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What supporting documents are/will be available?
No Supporting Document Provided
Type
Other Details
Attachment
Study protocol
Study Protocol and Statistical Analysis Plan
https://cdn.clinicaltrials.gov/large-docs/19/NCT03622619/Prot_SAP_000.pdf
Statistical analysis plan
Study Protocol and Statistical Analysis Plan
https://cdn.clinicaltrials.gov/large-docs/19/NCT03622619/Prot_SAP_000.pdf
Results publications and other study-related documents
No documents have been uploaded by study researchers.
Results are available at
https://clinicaltrials.gov/study/NCT03622619