1-Day Acuvue DEFINE Color-Enhancing Contacts Introducing the new 1-Day Acuvue DEFINE Color-Enhancing Contacts We are pleased to announce the launch of 1-Day Acuvue DEFINE contact lenses. These new contact lenses enhance the natural beauty of your eyes with three unique effects for every eye color. Available in Shimmer, Sparkle and Shine. See the lenses: Select a model and see how DEFINE lenses enhance each eye color. Come in for a try on.