Patents Assigned to Mencion Co., Ltd.
  • Patent number: 6286956
    Abstract: 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 r
    Type: Grant
    Filed: October 14, 1999
    Date of Patent: September 11, 2001
    Assignee: Mencion Co., Ltd.
    Inventors: Hiroyuki Oyama, Tadashi Sawano, Kazuya Miyamura, Asaki Suzaki, Yukihisa Sakai