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A progressive multifocal lens customized for wearers and its preparation method

A progressive multifocal lens technology, applied in the field of personalized progressive multifocal lens and its preparation

Active Publication Date: 2019-06-14
SUZHOU MASON OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese invention patent CN 101999092 discloses a progressive refractive power lens and its design method, evaluation method of refractive power lens, which involves the design and evaluation method of progressive refractive power lens considering the pupil aperture, mainly to evaluate the inner deviation of the actual line of sight And optimize the design inset of the lens to provide a progressive refractive lens with good binocular vision, which does not involve the evaluation of the refractive power actually felt by the human eye in different line of sight directions and the corresponding optimized design of the lens

Method used

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  • A progressive multifocal lens customized for wearers and its preparation method
  • A progressive multifocal lens customized for wearers and its preparation method
  • A progressive multifocal lens customized for wearers and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 1. Optometry is carried out for the wearers of custom-made progressive multifocal lenses, and the optometry prescription includes the following parameters:

[0052] (a) The refractive index of the lens material to be processed, the refraction diopter value representing the distance vision of the lens required by the customized glasses, the refraction diopter value representing the near vision vision of the lens, the left lens or the right lens, the inner progressive lens or the outer progressive lens, The length of the main gradient meridian, the inner deviation; the inner progressive lens is the inner surface of the lens is a progressive surface, the outer surface is a non-gradient surface; the outer progressive lens is the outer surface of the lens is a progressive surface, and the inner surface is a non-gradient surface ; The length of the main gradient meridian is the length of the line of intersection between the wearer's line of sight and the eyeglass from the far-...

Embodiment 2

[0072] The lens design and processing are carried out according to the lens preparation process provided in Example 1.

[0073] The optometry prescription provides the following parameters:

[0074]The distance vision of the lens is 0 diopter, and the near vision is 1.75 diopter. The left lens is an outer progressive lens with a refractive index of 1.597. The length of the main gradient meridian is 21 mm, and the inner deviation is 2 mm.

[0075] After the wearer wears the selected spectacle frame, the vertical inclination angle of the lens is 9 degrees, the horizontal inclination angle is 7 degrees, the center position of the glasses is 3 mm, and the pupil position is 26 mm.

[0076] In this embodiment, according to the diopter of the lens provided by the optometry prescription, the outer progressive lens and the refractive index of the lens material, the inner surface is selected as a spherical surface of 3 diopters, and the radius of curvature is 199.0 mm. According to the...

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Abstract

The invention discloses a progressive multi-focal lens customized for a glasses wearer and a preparation method of the progressive multi-focal lens. An evaluation model is established on basis of a lens material refractive index, the lens assembling center position, the pupil positions, the lens inclining angles and to-be-evaluated lens rise data provided by an optometry prescription, the strabismus diopter and the strabismus astigmatism are taken as evaluation results, the sight of the wearer is evaluated according to the actual refracting power of the progressive multi-focal lens, optimizing design of a matched transitional surface of the progressive multi-focal lens as well as aspheric surface optimization and asymmetric compensation of a non-transitional surface is performed according to the evaluation results to reduce deviation and strabismus astigmatism of the strabismus diopter of the lens, and the progressive multi-focal lens customized for the glasses wearer is obtained. According to the provided progressive multi-focal lens, the pupil positions of human eyes and inclination of the lens when the glasses wearer wears glasses are taken into consideration, the refracting power of the lens in different sight directions of the human eyes is evaluated, so that the glasses wearer wearing the glasses made of the lenses has good view and comfortable sensation.

Description

technical field [0001] The invention relates to a personalized progressive multi-focal lens and a preparation method thereof, in particular to a method for designing a progressive multi-focal lens and the processed lens by considering the position of the pupil of the human eye and lens tilt factors. Background technique [0002] The surface of the progressive multifocal ophthalmic lens is divided into a peripheral astigmatism area and an effective viewing area. The effective viewing area includes the far viewing area, the gradient transition area, and the near viewing area. The distance vision zone is located on the upper part of the glasses, and a reference point in the distance vision zone is called the distance vision reference point; the near vision zone is located in the lower part of the glasses, and a reference point in the near vision zone is called the near vision reference point. The difference in diopters between the far points is called add power. The gradient ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02C7/06G02C7/02
CPCG02C7/024G02C7/028G02C7/061G02C7/063
Inventor 陈晓翌余浩墨
Owner SUZHOU MASON OPTICAL CO LTD