O2 Optix contact lenses are the latest contact lenses offered by Ciba Vision. The unique technology behind the O2 Optix contact lenses design is the same silicon hydrogel material which made Ciba Vision’s Night & Day contact lenses so successful. Similar to Ciba Vision’s Night & Day contact lenses, O2 Optix contact lenses allow a high level of oxygen flow to your eyes making them one of the most healthy choice for contact lenses. O2 Optix contact lenses have achieved FDA approval as extended wear contact lenses and can be worn for up to 6 days straight. If used as daily wear lenses, O2 Optix contact lenses are approved for use of up to two weeks before discarding.