Clinical trial NCT02537717: A Contralateral Dispensing Clinical Trial of Study Test Silicone Hydrogel Lens Against Enfilcon A Silicone Hydrogel Lens
Official title: A Contralateral Dispensing Clinical Trial of Study Test Silicone Hydrogel Lens Against Enfilcon A Silicone Hydrogel Lens
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Myopia
Lead sponsor: CooperVision International Limited (CVIL)
Sponsor class: INDUSTRY
First posted: 2015-09-02
Enrollment: 17
Sex: ALL
Minimum age (years): 17
Standard ages: CHILD
ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: TREATMENT

Brief summary: This will be a 1-month dispensing, double-masked, randomized, contralateral study comparing the test lens against the control lens. The assignment of lenses to eyes (i.e. which lens type is to be worn in which eye throughout the study) will be selected according to a randomization table.

Detailed description: Both test and control lenses will be used in a daily wear modality for 1 month. It is anticipated that this study will involve the following visits: Baseline (screening and dispense visit combined), 2-week visit and 4-week visit.

Eligibility criteria: Inclusion Criteria:

* Is at least 17 years of age and has full legal capacity to volunteer
* Has read and understood the information consent letter
* Is willing and able to follow instructions and maintain the appointment schedule
* Is correctable to a visual acuity of 20/30 or better (in each eye) with their habitual correction or the assigned study lenses
* Is an adapted soft contact lens wearer (For the purpose of this study: Current lens wear at least 3 days per week, 8 hours each day.)

Exclusion Criteria:

* Is participating in any concurrent clinical or research study
* Has any known active\* ocular disease and/or infection;
* Has a systemic condition that in the opinion of the investigator may affect a study outcome variable
* Is using any systemic or topical medications that in the opinion of the investigator may affect a study outcome variable\^
* Has known sensitivity to the diagnostic pharmaceuticals to be used in the study
* Is pregnant, lactating or planning a pregnancy at the time of enrolment (by verbal confirmation at the screening visit). Rationale is that systemic changes over time due to pregnancy/lactating may adversely affect contact lens wear e.g. ocular dryness may increase.
* Is aphakic
* Has undergone corneal refractive surgery.

For the purposes of this study, active ocular disease is defined as infection or inflammation which requires therapeutic treatment. Mild (i.e. not considered clinically relevant) lid abnormalities (blepharitis, meibomian gland dysfunction, papillae), corneal and conjunctival staining and dry eye are not considered active ocular disease. Neovascularization and corneal scars are the result of previous hypoxia, infection or inflammation and are therefore not active.

Participants will be excluded with significant slit lamp findings (e.g. infiltrates or other slit lamp findings Grade 3 or above: corneal edema, tarsal abnormalities, and conjunctival injection) or active ocular disease (e.g. glaucoma, history of recurrent corneal erosions, and intraocular infection or inflammation of an allergic, bacterial, or viral etiology).

\^ For the purposes of this study, participants will be excluded, if currently taking medication, such as oral antihistamines, antihistamine eye drops, oral and ophthalmic beta-adrenergic blockers (e.g. Propanolol, Timolol), anticholinergics, oral steroids and any prescribed or over-the-counter eye medication, except artificial tears or eye lubricants

Primary outcomes:
measure: Subjective Ratings of Comfort
timeFrame: Baseline (After 10 minutes of lens dispense)
measure: Subjective Ratings of Comfort
timeFrame: 2 weeks
measure: Subjective Ratings of Comfort
timeFrame: 4 weeks
measure: Subjective Comfort Preference
timeFrame: Baseline (after 10 minutes of lens dispense)
measure: Subjective Comfort Preference
timeFrame: 2 weeks
measure: Subjective Comfort Preference
timeFrame: 4 weeks
measure: Lens Wettability
timeFrame: Baseline (After 10 minutes of lens dispense)
measure: Lens Wettability
timeFrame: 2 weeks
measure: Lens Wettability
timeFrame: 4 weeks
Secondary outcomes:
Other outcomes:
Locations:
city: Waterloo
country: Canada
facility: Center for Contact Lens Research, University of Waterloo
state: Ontario
Study officials:
affiliation: University of Waterloo
name: Lyndon Jones
role: PRINCIPAL_INVESTIGATOR
References: