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Non-progressive corridor bi-focal lens with substantially tangent boundary of near and distal visual fields

A non-progressive, field-of-view technology, applied in the field of ophthalmology, which can solve problems such as astigmatism and image distortion

Inactive Publication Date: 2016-02-24
迈克尔·瓦莱斯 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Continuous changes in focus strength eliminate jumps, but often introduce astigmatism and other field of view imperfections
[0007] Despite the many advances in the field of multivision lenses, lens designers are still faced with the trade-off of undesired image jumps at the bifocal line or undesired image distortions outside narrow progressive channels

Method used

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  • Non-progressive corridor bi-focal lens with substantially tangent boundary of near and distal visual fields
  • Non-progressive corridor bi-focal lens with substantially tangent boundary of near and distal visual fields
  • Non-progressive corridor bi-focal lens with substantially tangent boundary of near and distal visual fields

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Embodiment Construction

[0017] figure 1 An embodiment of the invention is shown in plan view from the eye side of a bifocal non-progressive lens 10 comprising an inner (concave) surface 11 and two surfaces 12, 14 of different powers (i.e., the first optical surface 12 and the second optical surface 14), the two surfaces 12, 14 respectively provide a far field of view and a near field of view that blend smoothly with each other and with the remainder of the concave surface. Combined, does not have the bifocal section that is often encountered.

[0018] The first optical surface 12 and the second optical surface 14 are directly connected by a point of contact 16 where the larger radius near vision surface 14 is cotangent to the smaller radius distance vision surface 12 . Thus, the optical surfaces 12, 14 do not intersect within the concave surface 11 of the lens 10, but only at contact points. The optical surfaces 12 , 14 have a common tangential surface, which is internal to the lens 10 .

[0019] ...

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Abstract

An axially symmetric, bifocal, non-progressive ophthalmic lens which, in a smooth pathway between a distant vision field and a near vision field, has no perceptible progression of power, dividing line, image jump, nor other optical distortion.

Description

[0001] Cross References to Related Applications [0002] This application is a Polish patent application P.404250 filed on June 7, 2013 entitled "Dwougniskowanieprogresywnasoczewkaoptyczna" and a US application entitled "NON-PROGRESSIVECORRIDORBI-FOCALLENSWITHTANGENTBOUNDARYOFNEARANDDISTANTVISUALFIELDS" filed on February 11, 2014 under the requirements of the Paris Convention14 / 178,992, and the disclosures of both applications are incorporated herein by reference. technical field [0003] The present invention relates to ophthalmology. Particular embodiments relate to multivision ophthalmic lenses, such as bifocals. Background technique [0004] Throughout human life, the eye muscles continually apply focusing forces to the lens and eyeball of the human eye. Over time, the eyeballs and lenses are permanently deformed. This distortion results in a "multi-vision" effect, where people have difficulty focusing on both nearby and distant objects. Accordingly, two broad categ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02C7/06
CPCG02C7/06G02B7/06
Inventor 迈克尔·瓦莱斯安德烈·菲亚尔科夫斯基
Owner 迈克尔·瓦莱斯
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