Assessment of Tear Film-Based Proteins Associated With Care Solution Induced Corneal Staining

Inclusion Criteria: For non-lens wearers: * Normal eyes. * Currently not wearing contact lenses and has not worn contact lenses for the previous 6 months. * Free of dry eye using the Ocular Surface Disease Index (Schiffman et al). * Other protocol-defined inclusion criteria may apply. For contact lens wearers: * Currently wearing soft contact lenses. * Free of dry eye during lens wear using the Contact Lens Dry Eye Questionnaire Short-Form (Nichols et al, Cornea, 2002). * Reports a contact lens wearing time of at least 12 hours per day, 7 days per week, daily wear basis (not overnight wear). * Reports only occasional use of contact lens rewetting drops or artificial tears. * Other protocol-defined inclusion criteria may apply. Exclusion Criteria: For non-lens wearers and contact lens wearers: * Pregnant. * Participating in another research study. * Exhibiting staining with fluorescein in more than 5% of the total cornea (graded by "extent" of staining across 5 regions). * Other protocol-defined exclusion criteria may apply.