公开(公告)号：BR9804423A

公开(公告)日：1999-11-03

申请号：BR9804423

申请日：1998-10-16

Applicant: ESSILOR INT

Inventor： CLAUDE PEDRONO ,  GILLES LE SAUX ,  CLAIRE ROSSIER

IPC: G02C7/06 ,  G02C7/02

Abstract: The lens has an aspherical surface (S) presenting at any point a mean sphere and cylinder, having a distance vision zone (VL), a near vision zone (VP), an intermediate vision zone (VI) and a main meridian of progression (MM') passing through all three zones. The relationship between a maximum cylinder within a circle of 20 mm radius centered on the geometrical center of the lens and the distance from the center to a point inside the circle or maximum cylinder is less than or equal to half the maximum inclination of the mean sphere on the main meridian of progression.