Frequency 55 Aspheric contact lenses: the aspheric design produces an unsurpassed level of visual quality by concentrating light to a common point instead of a general area inside your eye allowing more precise vision. Daily wear or one week extended wear as directed by your physician. Sold as 6 identical lenses per box. The exact same contacts are sold under the private label names 2CLear Premium, Cooperflex Premium Aspheric, Provision Premium and Encore Premium; these lenses are all Frequency 55 Aspheric. If you wear any of these contacts with an 8.6 BC, according to Cooper you may order the Frequency 55 Aspheric in BC 8.7.