Multifocal ocular lens including intermediate vision correction region between near and distant vision correction regions

摘要

Multifocal ocular lens including a central vision correction region having a first optical power value, an outer vision correction region spaced radially outwardly from the central vision correction region and having a second optical power value different from the first optical power value, and an intermediate vision correction region located radially intermediate between the central and outer vision correction regions and having a distribution of optical power between the first and second optical power values, and wherein the intermediate region has a first transition point and a second transition point which is not radially inwardly spaced from the first transition point, such that the distribution of the optical power of the intermediate region includes two optical power values which are defined by the first and second transition points, respectively, and which are determined such that the optical power value defined by the second transition point is closer to the first optical power value of the central region than the optical power value defined by the first transition point.