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Optical function determination method

An optical function and optical standard technology, applied in optics, optical components, optical components, etc., can solve problems such as poor optical properties of optical functions of spectacle lenses

Active Publication Date: 2015-11-25
ESSILOR INT CIE GEN DOPTIQUE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some cases, the optical function of an optimized spectacle lens may be worse than that of a non-optimized spectacle lens

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0248] Example 1 corresponds to the application of the method of the invention in the case of progressive spectacle lenses.

[0249] Figures 17a, 17b and 17c illustrate the spherical profile along the meridian, the spherical profile and the cylindrical profile, respectively, in Example 1 using a substrate with 3D and an optical reference surface in increments of 2.5D.

[0250] The wearer's prescription is hypermetropia - 4D power and incremental 2.5D.

[0251] The criteria chosen for the optical function were astigmatism in central vision and refractive power in central vision.

[0252] For astigmatism in central vision, the target value is set to 0D along the meridian between the distance and near vision points.

[0253] For power in central vision, the target value was set to -4D along the gaze direction corresponding to 20° above the fitting intersection and the difference in power between the far and near points was 2.88D.

[0254] Parameters of the virtual wearer specta...

example 2

[0261] Example 2 corresponds to the application of the method of the invention in the case of progressive spectacle lenses.

[0262] Figures 20a, 20b and 20c illustrate the spherical profile along the meridian, spherical profile and cylindrical profile, respectively, of the optical reference surface used in Example 2 with an 8D substrate and 2.5D increments.

[0263] The wearer is prescribed 6D power for hyperopia and 2D for incremental.

[0264] The criteria chosen for the optical function were astigmatism in central vision and refractive power in central vision.

[0265] For astigmatism in central vision, the target value is set to 0D at the fit intersection, far vision and near vision.

[0266] For the power of central vision, the target value was set at 5.9D along the gaze direction corresponding to 20° on the fitting intersection and the difference in power between the distance and near vision points was 1.93D.

[0267] Parameters of the virtual wearer spectacle lens pa...

example 3

[0274] Example 3 corresponds to the application of the method of the invention in the case of progressive spectacle lenses.

[0275] Figures 23a and 23b illustrate spherical and cylindrical profile plots, respectively, of an optical reference surface with a 5.5D substrate and 2.5D increments used in Example 3.

[0276] The wearer's prescription is 2.5D power at the distance point and 2.5D incrementally.

[0277] The criteria chosen for the optical function were astigmatism in central vision and refractive power in central vision.

[0278] For astigmatism in central vision, the target value is set to have an angle of 29.5° between isoastigmatism lines corresponding to astigmatism 1D at eye downtrop corresponding to an angle of 40°.

[0279] For the refractive power of the central vision, the target value is set to have an angle of 17.5° between isopower lines corresponding to the refractive power of the myopia point 5D at an eye downturn corresponding to an angle of 40°.

[0...

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Abstract

A method implemented by computer means for determining a virtual wearer-ophthalmic lens-ergorama system associated with an optical function of an ophthalmic lens for a given wearer, comprising: a prescription data providing step, an optical reference surface data providing step, a virtual wearer-ophthalmic lens-ergorama system determining step, a criteria selecting step, a target value defining step, an evaluation step, and a modification step, in which at least one parameter of the virtual wearer-ophthalmic lens-ergorama system different from the base curve of the ophthalmic lens is modified, in order to minimize the difference between the target value and the evaluation criterion value.

Description

technical field [0001] The invention relates to a method implemented with the aid of computer means for determining, for a given wearer, a virtual wearer's spectacle lens ergorama system related to the optical function of the spectacle lens. The invention also relates to a calculation and manufacturing method of spectacle lenses with optical functions associated with a virtual wearer spectacle lens partial view system. Background technique [0002] Conventionally, in order to obtain a pair of spectacle lenses corresponding to a wearer's prescription, semi-finished spectacle lens blanks are provided by a lens manufacturer to a prescription laboratory. Typically, a semi-finished spectacle lens blank comprises a first surface corresponding to an optical reference surface, eg a progressive surface in the case of a progressive lens, and a second spherical surface. A standard semi-finished lens blank with appropriate optical properties is selected according to the wearer's prescr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02C7/02
CPCG02C7/061G02C7/027B29D11/00961
Inventor 劳伦特·卡利克斯特西里尔·古伊劳克斯
Owner ESSILOR INT CIE GEN DOPTIQUE