The lens is made in aspheric design. This option is not new, used since the late nineties, however, manufacturers continue to work on it, trying to achieve greater visual acuity, better mobility on the eye and comfort. It would seem that the company already has an aspherical lens design – Frequency 55 Aspheric, however, the differences between the two lenses noticeable. The main thing is that Biomedics Evolution aspheric design made on a somewhat smaller thickness (0.07 mm) and used material ocufilcon, whereby the oxygen permeability of the lens (Dk / t 27.0) makes it more interesting than Frequency 55 Aspheric, – in that the lens appears the opportunity to apply extended wear mode. Although with the advent of silicone lenses oxygen permeability index Dk / t 27.0 looks ridiculously low.