Patent ID: 8944593
Filing Date: 2015-02-03
Classification: G02C

Abstract:
1. A method comprising: having a description of a lens adapted for an eye, wherein the lens comprising a first focal portion associated with a first distance and a second focal portion associated with a second distance, and wherein the lens comprising an intermediate portion having a uniform gradient change in optical power between a first power and a second power associated with the first and second focal portions respectively; identifying in the lens, based on a prescription for the eye, an intermediate focal portion associated with an intermediate distance, wherein the intermediate distance is between the first and second distances, wherein the prescription for the eye relates to the first distance, the second distance and the intermediate distance; and planning, based on a prescription for a counterpart eye and based on the lens, a counterpart lens adapted for the counterpart eye, wherein the prescription comprises focal powers required by the counterpart eye to achieve focus at the first distance, the second distance and the intermediate distance, wherein the counterpart lens comprising a first, a second and an intermediate focal areas, wherein the first, second and intermediate focal areas are located in locations parallel to locations of the first, second and intermediate focal portions, respectively, wherein the counterpart lens comprising a first gradient change in optical power between the first and intermediate focal areas and a second gradient change in optical power between the intermediate and second focal areas, whereby the counterpart lens provides a non-uniform gradient change in optical power between the first focal area and the second focal area, wherein said planning is performed by a processor.