US 11,681,163 B2
Pair of progressive power lenses and design method for the same
Eiichiro Yamaguchi, Tokyo (JP); Toshiaki Sonehara, Tokyo (JP); and Ayumu Ito, Tokyo (JP)
Assigned to HOYA LENS THAILAND LTD., Pathumthani (TH)
Filed by HOYA LENS THAILAND LTD., Pathumthani (TH)
Filed on Mar. 25, 2021, as Appl. No. 17/212,582.
Claims priority of application No. JP2020-059538 (JP), filed on Mar. 30, 2020.
Prior Publication US 2021/0302761 A1, Sep. 30, 2021
Int. Cl. G02C 7/06 (2006.01); G02C 7/02 (2006.01)
CPC G02C 7/061 (2013.01) [G02C 7/027 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A pair of progressive power lenses comprising a right eye lens and a left eye lens,
wherein, in a case in which each of a portion on the right eye lens and a portion on the left eye lens through which a line of sight passes in a frontal gaze in which a wearer views an object that is located on a median plane of the wearer and is located away from the wearer by a predetermined distance is taken as a main gaze line,
in order to make a visual field width at a predetermined power threshold wider than when a peak of a power distribution on a horizontal cross-section of the right eye lens and a peak of a power distribution on a horizontal cross-section of the left eye lens are on the main gaze line,
the power distribution on the horizontal cross-section of the right eye lens has the peak at a position that is away from the main gaze line toward a nose side or an ear side thereof, and
the power distribution on the horizontal cross-section of the left eye lens has the peak at a position that is away from the main gaze line toward a nose side or an ear side thereof in a direction opposite to that of the right eye lens.