Biomedics 1 day extra are the latest daily disposable contact lenses in the biomedics range manufactured by coopervision these contact lenses benefit from a 55 water content helping to make them feel comfortable for up to 16 hours biomedics 1 day extra are designed to deliver the most natural comfortable lens wearing experience studies show that upgrading from biomedics 1 day to biomedics 1 day extra can reduce the feeling of dryness and provide greater comfort