Patent ID: 6286956
Filing Date: 2001-09-11
Classification: G02C

Abstract:
A multifocal ocular lens having a vision correction area which has different values of optical power and comprises:a central vision correction region having a first optical power value;an outer vision correction region located radially outwardly of said central vision correction region with a predetermined radial spacing therebetween and having a second optical power value different from said first optical power value; andan intermediate vision correction region located radially intermediate between said central and outer vision correction regions and having a distribution of optical power between said first and second optical power values,and wherein said intermediate vision correction region has at least one pair of a first transition point and a second transition point which is not radially inwardly spaced from said first transition point, said distribution of optical power of said intermediate vision correction region including two optical power values which are defined by said first and second transition points, respectively, and which are determined such that the optical power value defined by said second transition point is closer to said first optical power value of said central vision correction region than the optical power value defined by said first transition point.