Your eyes feel moist naturally. But throughout the day, your eyes can feel tired, dry, and irritated — and your vision blurry. Biotrue ONEday lenses are designed to work like your eyes, for comfortable vision throughout the day. This revolutionary new lens material, inspired by the biology of the eye: Matches the moisture level of the natural eye Mimics one of your own tear's barriers to dehydration, with a wetting agent enriched at surface of lens.