Biotrue ONEday is a daily disposable spheric contact lens that has a unique dehydration barrier to help retain moisture for up to 16 hours. Biotrue Oneday hi-def optics for clear and comfortable vision. The Biotrue technology ensures that your vision will stay consistently crisp and clear, and your eyes will feel naturally comfortable throughout the day. Biotrue also has “High Definition Optics” – designed to help reduce halos and glare – which means you get great vision in any situation.