A Bilateral Dispensing Comparison of Comfilcon A Over Senofilcon C Contact Lenses

This study is a 30-subjects prospective, double-masked (investigator and participant), bilateral, randomized, one month cross-over dispensing study comparing subject acceptance of Comfilcon A against Senofilcon A contact lenses.

Inclusion criteria

A person is eligible for inclusion in the study if he/she:

• Is at least 17 years of age 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;
• Is an adapted soft contact lens wearer, who currently wears contact lenses for a minimum 3 days/week and 8 hours/day AND who anticipates no difficulty wearing CLs for 6 days/week, 10 hours /day.
• Is willing to wear contact lens in both eyes for the duration of the study;
• Has a minimum astigmatism of - 0.75, determined by refraction;
• Can be fit with the two study contact lens types in the powers available;
• Has a distance visual acuity of 0.20 logMAR (approx 20/30) or better, determined by refraction;
• Can achieve a distance visual acuity of 0.20 logMAR (approx 20/30) or better in each eye with the study contact lenses.
• Has clear corneas and no active* ocular disease;

Exclusion criteria

A person will be excluded from the study if he/she:

• Is participating in any concurrent clinical trial;
• 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;
• 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 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;
• Is pregnant, lactating or planning a pregnancy at the time of enrolment (by verbal confirmation at the screening visit);
• Is aphakic;
• Has undergone refractive error surgery;
• Has participated in the previous QUENA study.