OPHTHALMIC LENS,申请号CA19982250616-传众专利搜索

OPHTHALMIC LENS

申请公布号：CA2250616(A1)

申请号：CA19982250616

申请日期：1998.10.15

申请公布日期：1999.04.16

申请人：

ESSILOR INTERNATIONAL

发明人：FAUQUIER, CATHERINE;ROLAND, ERIC;PEDRONO, CLAUDE;HARSIGNY, CHRISTIAN;JURKIEWIEZ, FANNY

分类号：G02C7/06;G02B3/10;G02C7/02;(IPC1-7):G02C7/06

主分类号：G02C7/06

摘要：An ophthalmic lens with an aspherical face is provided having a near vision region which is larger in size and wider than that of conventional multifocal lenses, and having reduced aberrations and, notably, astigmatism. Using A to signify a difference in mean sphere between the near vision control point and the geometrical center of the lens, this is achieved by making a surface area defined by points less than 20 mm from the geometrical center of the lens, and for which cylinder is comprised between 0.42.DELTA. and 0.84.DELTA. greater than the surface area defined by points less than 20 mm from the geometrical center, and for which cylinder is less than 0.42.DELTA..