The primary purpose of this study is to investigate the effect of silicone hydrogel contact lenses on conjunctival flora over a period of 6 months of daily wear. A secondary aim is to compare the levels of microbial contamination of silicone hydrogel lenses after daily wear.

Inclusion Criteria:

• Is correctable to at least 6/9 distance visual acuity in each eye with spherical contact lenses.
• Is a current full time soft contact lens wearer.
• Has no clinically significant anterior eye findings.
• Has no other active ocular disease

Exclusion Criteria:

• Has any systemic disease that might interfere with contact lens wear
• Is using any systemic or topical medications that will affect ocular health.
• Has any pre-existing ocular irritation that would preclude contact lens fitting.
• Has any ocular pathology or severe insufficiency of lacrimal secretion (dry eyes) that would affect the wearing of contact lenses.
• Has undergone corneal refractive surgery.
• Is pregnant, lactating or planning a pregnancy.
• Is participating in a concurrent clinical trial.
• Has a latex sensitivity.