Comparing Silicone Hydrogel Contact Lens Wearers to Hydrogel Contact Lens Wearers and Non-lens Wearers
Study Details
Study Description
Brief Summary
The primary objectives of this study is to to compare baseline data between 3 groups - habitual wearers of DDSH (Daily Disposable Silicone Hydrogel) contact lenses / habitual wearers of DDH (Daily Disposable Hydrogel) contact lenses / non-lens wearers for physiological responses and to compare the physiological responses post closed eye lens wear in 2 groups - habitual wearers of DDSH /habitual wearers of DDH after 3 hours.
Condition or Disease | Intervention/Treatment | Phase |
---|---|---|
|
N/A |
Detailed Description
This study is a multi-site, prospective, randomized, non-masked, unilateral, non-dispensing study.
Study Design
Arms and Interventions
Arm | Intervention/Treatment |
---|---|
Experimental: Daily Disposable Silicone Hydrogel Contact Lens Subjects will be randomized to wear Daily Disposable Silicone Hydrogel Contact Lens in one eye and will be patched for 3 hours with the contralateral eye remain open. |
Device: Daily Disposable Silicone Hydrogel Contact Lens
Subjects will be randomized to wear Daily Disposable Silicone Hydrogel Contact Lens in one eye and will be patched for 3 hours with the contralateral eye remain open.
|
Active Comparator: Habitual Daily Disposable Hydrogel Contact Lens Subjects will be randomized to wear Daily Disposable Hydrogel Contact Lens in one eye and will be patched for 3 hours with the contralateral eye remain open. |
Device: Daily Disposable Hydrogel Contact Lens
Subjects will be randomized to wear Daily Disposable Hydrogel Contact Lens in one eye and will be patched for 3 hours with the contralateral eye remain open.
|
Active Comparator: Non-lens wearers Subjects with no previous history of contact lens wear |
Other: Non Lens Wearers
Subjects with no previous history of contact lens wear
|
Outcome Measures
Primary Outcome Measures
- Limbal Redness [3 hours]
Limbal redness will be measured on EFRON Scale of 0-4, 0.1 steps (0-none, 1- Trace, 2-Mild, 3-Moderate, 4- Severe)
- Bulbar Redness [3 hours]
Bulbar redness will be measured on EFRON Scale of 0-4, 0.1 steps (0-none, 1- Trace, 2-Mild, 3-Moderate, 4- Severe)
- Corneal vessel ingrowth [3 hours]
Corneal vessel ingrowth will be measured using slit lamp photography and image analysis for longest vessel in mm (0.1 to 5mm in 0.01 steps, 0.1mm - Short Vessel, 5mm - Long vessel)
- Number of Corneal vessel ingrowth [3 hours]
Number of Corneal vessel ingrowth greater than 0.5mm will be measured using slit lamp photography and image analysis on a scale of 0-99 (0- best, 99- worst case)
Eligibility Criteria
Criteria
Inclusion Criteria:
-
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 Criteria:
-
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.
Contacts and Locations
Locations
Site | City | State | Country | Postal Code | |
---|---|---|---|---|---|
1 | Eurolens Research | Manchester | United Kingdom |
Sponsors and Collaborators
- Coopervision, Inc.
Investigators
- Principal Investigator: Lyndon Jones, PhD FCOptom, Centre for Ocular Research & Education
Study Documents (Full-Text)
None provided.More Information
Publications
None provided.- EX-MKTG-89