Status:
COMPLETED
Comparing Silicone Hydrogel Contact Lens Wearers to Hydrogel Contact Lens Wearers and Non-lens Wearers
Lead Sponsor:
CooperVision, Inc.
Conditions:
Myopia
Eligibility:
All Genders
17-60 years
Phase:
NA
Brief Summary
This study was a multi-site, prospective, randomized, non-masked, unilateral, non-dispensing study.
Detailed Description
The purpose of this study was to to compare physiological response baseline data between 3 groups - habitual wearers of Daily Disposable Silicone Hydrogel (DDSH) contact lenses, habitual wearers of Da...
Eligibility Criteria
Inclusion
- Is between 17 and 60 years of age inclusive (age matching required between all 3 study groups), and has full legal capacity to volunteer;
- Has had a self-reported oculo-visual examination in the last two years.
- Has read and signed an information consent letter;
- Is willing and able to follow instructions and maintain the appointment schedule;
- No previous history of overnight contact lens wear or PMMA (polymethylmethacrylate) lens wear.
- Auto-refraction vertexed spherical equivalent between +4.00 and -8.00 (prescription matching required between groups 1 \& 2). This criterion is non-applicable to participants in group 3.
- Is found to be in one of the study groups matched by age (±5 years), ethnicity (Asian vs. non-Asian) and CL Rx (±2.00 D) according using the following criteria.
- GROUP 1: For the past (minimum) 6 months has ONLY worn spherical DDSH lenses AND prior to wearing this lens they only wore SH material lenses in the past (minimum) 3 total years.
- GROUP 2: For the past (minimum) 6 months has ONLY worn spherical DDH lenses AND prior to wearing this lens they only wore H material lenses in the past (minimum) 3 total years.
- For groups 1 \& 2, currently and for at least the previous 6 months has had habitual daily disposable wear schedule of at least 8 hrs a day, 5 days a week in only one material category - either silicone hydrogel or hydrogel material. This criterion is not-applicable to participants in group 3.
- Is willing to wear the study contact lens in the randomized eye for 3 hours of eye closure on the second study day. This criterion is not-applicable to participants in group 3.
- Has clear and healthy corneas and anterior eye and no active ocular disease;
- Can achieve monocular HCVA of logMAR 0.10 or better in each eye with subjective refraction or pinhole.
- Can achieve acceptable fit and comfort in the randomized eye with the study lens. This criterion will be confirmed at the baseline visit (V1). This criterion is not-applicable to participants in group 3.
- Has a wearable pair of spectacles.
Exclusion
- Is participating in any concurrent clinical trial;
- Is unable/unwilling to provide permission for the study site to seek CL history from their eye care practitioner
- Has any known active ocular disease and/or infection;
- Has a systemic condition that in the opinion of the investigator may affect a study measure or interfere with contact lens wear; this may include, but not be limited to, diabetes, hyperthyroidism, recurrent herpes simplex/zoster, Sjogren's syndromes, xerophthalmia, acne rosacea, Stevens-Johnson syndromes, and systemic connective tissue disorders e.g. rheumatoid arthritis.
- Is using any systemic or topical medications that in the opinion of the investigator may affect a study measure;
- Has known sensitivity to fluorescein dye, topical anesthetic, or products to be used in the study;
- Appears to have any active ocular pathology, ocular anomaly or severe insufficiency of lacrimal secretion (severe dry eye) that would affect the wearing of contact lenses;
- Appears to have any signs of corneal inflammation or previous infection or corneal opacity/scar;
- Is pregnant, lactating or planning a pregnancy at the time of enrolment (by verbal confirmation at the screening visit), due to potential ocular physiological changes, such as changes in the corneal shape and cell types;
- Is aphakic;
- Has undergone refractive error surgery, or has a history of any ocular surgery or injury.
- Is a toric or multifocal contact lens wearer.
Key Trial Info
Start Date :
March 6 2019
Trial Type :
INTERVENTIONAL
Allocation :
ACTUAL
End Date :
October 7 2022
Estimated Enrollment :
22 Patients enrolled
Trial Details
Trial ID
NCT04886479
Start Date
March 6 2019
End Date
October 7 2022
Last Update
January 30 2024
Active Locations (2)
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1
CORE, University of Waterloo
Waterloo, Canada
2
Eurolens Research
Manchester, United Kingdom