Evaluation of the Performance of Different Daily Disposable Lens Designs in Habitual Soft Contact Lens Wearers

This study is a prospective, bilateral eye, double-masked, randomized, 1-week cross-over, daily-wear design involving two different daily disposable lens types. Each lens type will be worn for approximately one week, during which participants record their subjective lens-wear experience.

Inclusion criteria

• Is at least 18 years of age and has full legal capacity to volunteer;
• Has read and signed an information consent letter;
• Self reports having a full eye examination in the previous two years;
• Anticipates being able to wear the study lenses for at least 8 hours a day, 7 days a week;
• Is willing and able to follow instructions and maintain the appointment schedule;
• Habitually wears soft contact lenses, for the past 3 months minimum;
• Has refractive astigmatism no higher than -0.75DC in each eye;
• Can be fit and achieve binocular distance vision of at least 20/30 Snellen (Available lens parameters are sphere -1.00 to -6.00D, 0.25D steps).

Exclusion criteria

• Is participating in any concurrent clinical or research study;
• Habitually wears one of the study contact lenses;
• Has any known active* ocular disease and/or infection that contraindicates contact lens wear;
• 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 contact lens wear or a study outcome variable;
• Has known sensitivity to the diagnostic sodium fluorescein used in the study;
• Self-reports as pregnant, lactating or planning a pregnancy at the time of enrolment;
• Has undergone refractive error surgery or intraocular surgery.