On-Eye Optical Quality of Lotrafilcon B Lenses Over 12 Hours

Inclusion Criteria: * Habitual prescription +5.00 D to -6.00 D * 18-35 years of age * The subject must appear able and willing to adhere to the instructions set forth in this clinical protocol. * Vertex corrected refractive cylinder must be -0.75 or less. * Visual acuity best correctable to 20/25 or better for each eye * The subject must read and sign the Informed Consent form. * Mesopic pupil size \>5.00 mm. Exclusion Criteria: * active condition that would prevent contact lens wear * history of issues of eye alignment or binocularity by self-report * doctor diagnosed, self-reported accommodative or binocular vision issues * doctor diagnosed, self-reported ocular surface disease or dry eye requiring regular, ongoing treatment