Encore Premium (Frequency 55 Aspheric) uses a unique lens design to offer easy to care for lens with exceptional comfort and clarity. By focusing light to a common focal point on the back of your eye, instead of a general area, the aspheric design gives you more precise, crisper vision. All orders will be shipped as either Encore Premium or Frequency 55 Aspheric. These contact lenses are tinted for ease of handling and will not change the color of your eye. The tint is simply designed to facilitate locating the contact lenses in solution.