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

Inclusion Criteria: Is at least 18 years of age and no older than 39 years, and has full legal capacity to volunteer; Has read and signed an information consent letter; Is willing and able to follow instructions and maintain the appointment schedule; Self-reports having a full eye examination in the previous two years; Has healthy eyes with no health condition or medication that contra-indicate contact lens wear, in the opinion of the investigator; Anticipates being able to wear the study lenses for at least 8 hours a day, 6 days a week; Habitually wears spherical soft contact lenses, for the past 3 months minimum: It is preferred that all participants are habitual frequent replacement lens wearers. However, if this is not possible then no more than 5 participants can be habitual daily disposable lens wearers at each site, the rest must be habitual frequent replacement lens wearers; - For the frequent replacement wearers: No more than 3 can be habitual wearers of the Avaira Vitality™/ Serenity™ brand (or their equivalent private label brand name) and no more than 3 can be habitual wearers of AIR OPTIX® plus HydraGlyde® can be enrolled at each site; 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 +6.00 to -6.00D, 0.25D steps). Exclusion Criteria: Is participating in any concurrent clinical or research study; Has any known active ocular disease and/or infection that contraindicates contact lens wear; Has a systemic or ocular 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.