Subjective and Conjunctival Response to Edge Design of Different Silicone Hydrogels

Inclusion Criteria: * Minimum age of 18 years old * Adapted contact lens wearer * Sign informed consent * Normal eyes with the exception of the need for visual correction * Astigmatism less than or equal to -0.75 diopter * Spherical prescription range between -10.00 and +6.00 diopters * Other protocol-defined inclusion criteria may apply Exclusion Criteria: * Any known sensitivity to the test articles used in the study * Monocular vision * Lid or conjunctival infections or abnormalities * Conjunctival staining greater than Grade 1 * Corneal staining greater than Grade 2 * Corneal edema or opacifications * Aphakia * Any previous corneal surgery * Iritis * Recent significant changes in visual acuity * Ocular disease that contraindicates contact lens wear * Tarsal abnormalities greater than Grade 2 * Any ophthalmic medication * Any systemic medication or condition that might affect the subject's participation in the study * Chronic upper respiratory infections or colds * Pregnancy or planning to become pregnant * Lactation * Seasonal allergies * Known infections or immunosuppressive disease * Participation in other studies * Other protocol-defined exclusion criteria may apply