Apparatus and method for manufacturing a progressive multi-focal lens

An apparatus for manufacturing a progressive multi-focal lens which has a progressive surface that includes distance portion and a near portion which have different refractive powers, and a progressive portion positioned between the distance use portion and the near portion in which refractive power changes progressively, comprising:

• a lens design elements that designs the progressive surface of the progressive multi-focal lens based upon customized information of an individual user including at least one of information concerning eyes of the user and information concerning a lifestyle of the user, and obtains processing data of the progressive multi-focal leans, the lens design element including:
• a design parameter determination component which determines design parameters of the progressive surface based upon said customized information,
• a coordinate obtaining leading component which obtains coordinate data of said progressive surface based upon said design parameters,
• a lens shape determination component which determines a shape of the progressive multi-focal lens with said progressive surface based upon said customized information,
• an optical power correcting component which obtains a corrected shape of the progressive multi-focal lens by correcting the shape of said progressive multi-focal lens based upon said customized information in order to improve optical power,
• a processing data creating component which obtains processing data of the corrected shape of said progressive multi-focal lens,
• a basic parameter file in which a plurality of basic parameters, among said design parameters, relating to a clear vision area of at least one of said distance portion and said near portion, are prepared in advance,
• a degree distribution data file in which degree distribution of said at least one of said distance portion and said near portion corresponding to the basic parameters is prepared in advance, and
• a base curve file in which a plurality of base curves that set surface refractive power of said distance portion are prepared in advance,
• wherein said design parameter determination component further includes:
• a basic parameter selecting component which selects said basic parameters from among said basic parameter file based upon at least one of first main lifestyle information and second main lifestyle information, which have different categories concerning a lifestyle of said user and which are included in said customized information,
• a basic parameter adjusting component which determines said basic parameters to design the progressive multi-focal lens from among said plurality of basic parameters selected by said basic parameter selecting component based upon subsidiary lifestyle information reflecting percentages in which each of said first main lifestyle information and second main lifestyle information affect the eyes of said user,
• a base curve selecting component which selects a base curve of said distance portion and near portion from said base curve file based upon degree information included in said customized information,
• a first degree distribution determination component which determines degree distribution of at least one of said distance portion and said near portion based upon degree distribution data of said degree distribution data file, and
• a second degree distribution determination component which determines degree distribution of said progressive portion based upon the degree distribution of said distance portion and said near portion.