Performance Evaluation of Reusable Contact Lenses When Worn For One Month By Habitual Soft Contact Lens Wearers

This study was a prospective, bilateral eye, double-masked, randomized, 1 month cross-over, daily-wear design involving two different frequent replacement type lenses. Duration of involvement for each participant was approximately 3 months.

Inclusion criteria

• Were at least 18 years of age and no older than 39 years, and had full legal capacity to volunteer;
• Had read and signed an information consent letter;
• Were willing and able to follow instructions and maintain the appointment schedule;
• Self-reported having had a full eye examination in the previous two years;
• Had healthy eyes with no health condition or medication that contra-indicate contact lens wear, in the opinion of the investigator;
• Anticipated being able to wear the study lenses for at least 8 hours a day, 6 days a week;
• Habitually wore spherical soft contact lenses, for the past 3 months minimum:

It was preferred that all participants were habitual frequent replacement lens wearers. However, if this was not possible then no more than 5 participants could be habitual daily disposable lens wearers at each site, the rest had to be habitual frequent replacement lens wearers;

• For the frequent replacement wearers: No more than 3 could be habitual wearers of the Avaira Vitality™/ Serenity™ brand (or their equivalent private label brand name) and no more than 3 could be habitual wearers of AIR OPTIX® plus HydraGlyde® can be enrolled at each site;
• Had refractive astigmatism no higher than -0.75DC in each eye;
• Could be fit and achieve binocular distance vision of at least 20/30 Snellen (Available lens parameters are sphere +6.00 to -6.00D, 0.25D steps).

Exclusion criteria

• Were participating in any concurrent clinical or research study;
• Had any known active ocular disease and/or infection that contraindicated contact lens wear;
• Had a systemic or ocular condition that in the opinion of the investigator may have affected a study outcome variable;
• Were using any systemic or topical medications that in the opinion of the investigator may have affect contact lens wear or a study outcome variable;
• Had known sensitivity to the diagnostic sodium fluorescein used in the study;
• Self-reported as pregnant, lactating or planning a pregnancy at the time of enrolment;
• Had undergone refractive error surgery or intraocular surgery.