The purpose of this study is to compare the visual acuity of an investigational silicone hydrogel to a commercially available silicone hydrogel in contact lens wearers.

Inclusion Criteria:

• Able to understand and sign an IRB-approved Informed Consent Form;
• Successful wear of spherical soft contact lenses in both eyes for a minimum of 5 days per week and 8 hours per day during the past 3 months:
• Manifest cylinder of ≤ 0.75 diopter (D) in each eye;
• Best corrected visual acuity (BCVA) of 20/25 or better in each eye;
• Other protocol-specified inclusion criteria may apply.

Exclusion Criteria:

• Any anterior segment infection, inflammation, abnormality or disease (including systemic) that contraindicates contact lens wear, as determined by the Investigator;
• Any use of systemic or ocular medications for which contact lens wear could be contraindicated, as determined by the Investigator;
• History of refractive surgery or plan to have refractive surgery during the study;
• Ocular or intraocular surgery within the previous 12 months or planned during the study;
• Current or history of pathologically dry eye in either eye that, in the opinion of the Investigator, would preclude contact lens wear;
• Any previous or current wear of MYDAY;
• Habitually wearing monovision or multifocal lenses during the last 3 months;
• Routinely sleeping in lenses for at least 1 night per week over the last 3 months prior to enrollment;
• Any use of topical ocular medications and artificial tear or rewetting drops that would require instillation during contact lens wear;
• Other protocol-defined exclusion criteria may apply.

This analysis population includes all randomized subjects exposed to any study lens evaluated in this study. Each subject/eye was analyzed according to the respective randomized lens, irrespective of the exposure (Full Analysis Set).

Dispense through study completion, an average of 2 weeks

Adverse Events (AEs) were any untoward medical occurrence, unintended disease or injury, or untoward clinical signs in subjects, users or other persons, whether or not related to the investigational medical device. AEs were obtained through solicited and spontaneous comments from subjects and through observations by the Investigator. This analysis population includes all subjects/eyes exposed to any study lens evaluated (Safety Analysis Set), based on treatment-specific exposure.

Alcon Observer and Sponsor personnel were also masked.