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Ophthalmic lens

A lens and ophthalmology technology, applied in glasses/protective glasses, glasses/goggles, lenses, etc., can solve problems such as blindness and achieve the effect of reducing the main factors

Pending Publication Date: 2022-02-15
HOYA LENS THAILAND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Intense myopia is known to have the potential to lead to blindness

Method used

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  • Ophthalmic lens
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0145] figure 1 (b) is a schematic side cross-sectional view of the negative lens for inhibiting the progression of myopia according to Examples 1 and 2.

[0146] Examples 1 and 2 are spectacle lenses for inhibiting myopia progression. Lens elements 1 and 2 related to Example 1 were set as follows. no e1 is the refractive index of the e-line reference in lens element 1, n e2 is the refractive index based on the e-line in lens element 2.

[0147] Lens element 1: the degree is positive

[0148] no e1 : 2.0009

[0149] ν e1 : 16.72

[0150] P gF’1 : 0.666

[0151] D1: 4.1 [D]

[0152] Lens element 2: the degree is negative

[0153] no e2 : 1.8656

[0154] ν e2 : 30.23

[0155] P gF’2 : 0.598

[0156] D2: -8.1 [D]

Embodiment 2

[0158] Lens elements 1 and 2 related to Example 2 were set as follows. Furthermore, Embodiment 2 is a preferred example that satisfies the above formula 4.

[0159] Lens element 1: the degree is positive

[0160] no e1 : 2.0009

[0161] ν e1 : 16.72

[0162] P gF’1 : 0.666

[0163] D1: 4.8 [D]

[0164] Lens element 2: the degree is negative

[0165] no e2 : 1.8656

[0166] ν e2 : 30.23

[0167] P gF’2 : 0.598

[0168] D2: -8.8 [D]

[0169]

[0170] The lens elements 1 and 2 related to the critical meaning of the preferred example satisfying the above-mentioned formula 3 are set as follows.

[0171] Lens element 1: the degree is positive

[0172] no e1 : 2.0009

[0173] ν e1 : 16.72

[0174] P gF’1 : 0.666

[0175] D1: 5.8 [D]

[0176] Lens element 2: the degree is negative

[0177] no e2 : 1.8656

[0178] ν e2 : 30.23

[0179] P gF’2 : 0.598

[0180] D2: -9.8 [D]

[0181]

[0182] Such as Figure 4 As shown in , in Examples 1 and 2, compared...

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PUM

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Abstract

Provided are an ophthalmic lens having two lens elements 1, 2 having different powers and a technology related thereto, wherein: when ve1 is the Abbe number (based on e-line) of the lens element 1 having the smaller absolute value of power and ve2 is the Abbe number (based on e-line) of the other lens element 2, the following expression (1) is satisfied, ve1<ve2...expression (1); and when PgF'1 is a partial dispersion ratio between a g-line and an F'-line in the lens element 1 having the smaller absolute value of the power, and PgF'2 is a partial dispersion ratio between a g-line and an F'-line in the other lens element 2, the following expression (2) is satisfied. PgF'1>PgF'2...expression (2).

Description

technical field [0001] This invention relates to ophthalmic lenses. Background technique [0002] As the myopia population increases, so does the population with severe myopia. It is well known that severe myopia can lead to blindness. Therefore, the increase of intense myopia is a major social problem, and a therapeutic method for suppressing the progression of myopia is generally required. [0003] Several methods of inhibiting the progression of myopia leading to intense myopia have been proposed. As an optical method for suppressing the progression of myopia, there is a method of using ophthalmic lenses such as glasses and contact lenses (soft contact lenses, orthokeratology). [0004] Patent Document 1 describes a spectacle lens in which a monochromatic aberration described later is added to exert an effect of suppressing the progression of ametropia such as myopia (hereinafter also referred to as myopia progression suppressing effect). The spectacle lenses are also...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02C7/06G02B13/00G02C7/04
CPCG02C7/06G02B13/00G02C7/04G02B27/005G02B3/00G02C2202/24G02C7/041G02C2202/16G02C7/022B29D11/0073B29D11/00009B29D11/00326G02B27/0062G02B9/10
Inventor 松冈祥平井口由纪向山浩行
Owner HOYA LENS THAILAND LTD
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