Comparison of Two Marketed Silicone Hydrogel Lenses

Inclusion Criteria: * Sign informed consent document; * Vision correctable to 20/40 Snellen (feet) or better in each eye at distance with both study contact lenses; * Willing to wear study lenses on a daily basis (minimum 5 days/week, 8 hours/day) and attend all study visits; * Successful wear of single-vision spherical, 2-week/ monthly replacement silicone hydrogel contact lenses in both eyes daily wear during the past 2 months for a minimum of 5 days/week, 8 hours/day. (Note: Monovision is included); * Other protocol-specified inclusion criteria may apply. Exclusion Criteria: * Any anterior segment infection, inflammation, disease or abnormality that contraindicates contact lens wear (within 7 days of enrollment, or current); * History of herpetic keratitis, corneal surgery or irregular cornea; * Any use of systemic or ocular medications within the past 30 days for which contact lens wear could be contraindicated as determined by the investigator; * Monocular (only 1 eye with functional vision) or fit with only one lens; * Current or past AIR OPTIX® AQUA or ULTRA lens wearers; * Other protocol-specified exclusion criteria may apply.