Crea Size 2.0 is a new special center thickness reduction feature designed tor plus lenses that you can add to any design. When you provide a frame shape with user parameters, first, a best ellipse is determined, then, only the effective frame shape with user parameters, first, a best ellipse is determined, then, only the effective frame shape area is calculated according to the prescription and design requested. The outside area is calculated as a blending zone with increasing curves in order to achieve the minimum center thickness. The traditional elliptical shape let you safely apply hard and A/R coatings. The final glazing at the edger removes the unnecessary part of the ellipse and gives you the final lens tor fitting with the best possible thickness. An extra 30% decrease is guaranteed compared to traditional ellipse calculation.
