JPS5776520A - Spectacle lens - Google Patents

Spectacle lens

Info

Publication number
JPS5776520A
JPS5776520A JP15253680A JP15253680A JPS5776520A JP S5776520 A JPS5776520 A JP S5776520A JP 15253680 A JP15253680 A JP 15253680A JP 15253680 A JP15253680 A JP 15253680A JP S5776520 A JPS5776520 A JP S5776520A
Authority
JP
Japan
Prior art keywords
section
correction part
shortsight
farsight
eyeball
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP15253680A
Other languages
Japanese (ja)
Inventor
Yoshinobu Ide
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP15253680A priority Critical patent/JPS5776520A/en
Publication of JPS5776520A publication Critical patent/JPS5776520A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive

Landscapes

  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Eyeglasses (AREA)

Abstract

PURPOSE:To decrease the turning angle of an eyeball and to reduce the fatigue of the eyeball, by concentrating the distortion or aberration at the side part of an intermediate sight correction part or the side part and its vicinity of the said correction part. CONSTITUTION:The farsight correction part and the shortsight correction part exist in the upper section D and the lower section N of a lens respectively, and the prograsive degree section P of the intermediate sight correction part exists between the sections D and N. The distortion or abberation is concentrated at an area of oblique lines where the full section P overlaps a part of the section N. The change is shown in the diagram for the refractive power along a main meridian line M-M', and the length of the line M-M' of the section P is reduced down to 0.5-5mm. in order to reduce the turning angle of an eyeball when the wearer of spectacles shifts his or her eyes from shortsight to farsight and vice versa. As a result, the distortion or deflection of an image can be substantially eliminated at the correction part of both the farsight and the shortsight.
JP15253680A 1980-10-30 1980-10-30 Spectacle lens Pending JPS5776520A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15253680A JPS5776520A (en) 1980-10-30 1980-10-30 Spectacle lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15253680A JPS5776520A (en) 1980-10-30 1980-10-30 Spectacle lens

Publications (1)

Publication Number Publication Date
JPS5776520A true JPS5776520A (en) 1982-05-13

Family

ID=15542581

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15253680A Pending JPS5776520A (en) 1980-10-30 1980-10-30 Spectacle lens

Country Status (1)

Country Link
JP (1) JPS5776520A (en)

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