Invention Grant
- Patent Title: Progressive power lens
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Application No.: US15518158Application Date: 2015-10-09
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Publication No.: US10203523B2Publication Date: 2019-02-12
- Inventor: Kazuma Kozu , Takao Tanaka
- Applicant: HOYA LENS THAILAND LTD.
- Applicant Address: TH Patumthani
- Assignee: HOYA LENS THAILAND LTD.
- Current Assignee: HOYA LENS THAILAND LTD.
- Current Assignee Address: TH Patumthani
- Agency: Oliff PLC
- Priority: JP2014-209351 20141010
- International Application: PCT/JP2015/078753 WO 20151009
- International Announcement: WO2016/056649 WO 20160414
- Main IPC: G02C7/06
- IPC: G02C7/06

Abstract:
Progressive power lens including: object side surface; eyeball side surface; and at least a near portion having a power for near vision, wherein object side surface includes power change in vertical direction of lens having progressive refractive power function, eyeball side surface includes power change in horizontal direction of lens having progressive refractive power function, when surface refractive power in the horizontal direction is defined as DHn and surface refractive power in vertical direction is defined as DVn in near power measurement point N in object side surface, relational expression of DHn
Public/Granted literature
- US20170293159A1 PROGRESSIVE POWER LENS Public/Granted day:2017-10-12
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