JPS5484753A - Spectacle lens - Google Patents
Spectacle lensInfo
- Publication number
- JPS5484753A JPS5484753A JP15082577A JP15082577A JPS5484753A JP S5484753 A JPS5484753 A JP S5484753A JP 15082577 A JP15082577 A JP 15082577A JP 15082577 A JP15082577 A JP 15082577A JP S5484753 A JPS5484753 A JP S5484753A
- Authority
- JP
- Japan
- Prior art keywords
- correcting position
- sightedness
- plane
- umbilical point
- principal meridian
- 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
Links
Landscapes
- Eyeglasses (AREA)
Abstract
PURPOSE: To eliminate fluctuations of an image in the medium vision position, by providing a part which is not an umbilical point, in the plane running along the principal meridian in the near-sightedness correcting position, and providing an umbilical point curve in the horizontal direction of the medium vision correcting position so as to remove astigmatism in the near-sighted vision.
CONSTITUTION: The long-sightedness correcting position F of variable focal spectacle lens is a part of aspherical face symmetrical to the axis of rotation of which curvature increases in the peripheral part. The near-sightedness correcting position N is a part of aspherical face symmetrical with respect to the axis of rotation of which curvature decreases in the peripheral part, and a part which is not an umbilical point is provided in at least one part in the plane running a long the principal meridian M-M'. In the medium vision correcting position P, the intersecting line group Cn-Cn' formed by the plane Ln orthogonal to the principal meridian M-M' and the refracted plane contains a curve which is not circular, and the plane running along a certain intersecting line Cn-Cn' is shaped in an umbilical point.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15082577A JPS5484753A (en) | 1977-12-14 | 1977-12-14 | Spectacle lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15082577A JPS5484753A (en) | 1977-12-14 | 1977-12-14 | Spectacle lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5484753A true JPS5484753A (en) | 1979-07-05 |
Family
ID=15505218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15082577A Pending JPS5484753A (en) | 1977-12-14 | 1977-12-14 | Spectacle lens |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5484753A (en) |
-
1977
- 1977-12-14 JP JP15082577A patent/JPS5484753A/en active Pending
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