公开(公告)号：JPH08211339A

公开(公告)日：1996-08-20

申请号：JP28066495

申请日：1995-10-27

Applicant: ESSILOR INT

Inventor： FURANSOWAAZU ASUBASU ,  KUROODO PEDORON

IPC: G02C7/06 ,  G02C7/02

Abstract: PROBLEM TO BE SOLVED: To provide spectacles in which wearing person can obtain a substantially constant of field of view of object in near visual acuity part regardless of non-emmetropia or power addition value of lens and without leading to the deterioration of lens characteristics. SOLUTION: The surface of the ophthalmic lens has a far visual acuity part VL containing a control point L for far visual acuity, a near visual acuity part VP containing a control point P for near visual acuity, an intermediate visual acuity part VI between the far visual acuity part VL and the near visual acuity part VP, and a progressive main diameter line MM' passing three parts of the far visual acuity part VL, the near visual acuity part VP and the intermediate visual acuity part VI. This ophthalmic lens has a power addition value defined as the deviation in the average spherical surface between the far visual acuity control point L and the near visual acuity control point P, and a base defined as the value of the average spherical surface in the far visual acuity control point L.