Clinical Evaluation of Biomedics Monthly Sphere and Avaira Vitality Sphere

The aim of this study is to evaluate the short-term clinical performance of two different sphere contact lenses after 15 minutes of daily wear each.

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 the required time of the study.
• Is willing and able to follow instructions and maintain the appointment schedule.
• Has refractive astigmatism no higher than -0.75 DC.
• Can be fit with the available lens parameters (sphere +6.00 to -10.00D).
• Can achieve binocular distance vision of at least 20/30 Snellen (logMAR 0.18) with the study contact lenses.

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 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.