JPH07159737A - Spectacle lens - Google Patents
Spectacle lensInfo
- Publication number
- JPH07159737A JPH07159737A JP30943993A JP30943993A JPH07159737A JP H07159737 A JPH07159737 A JP H07159737A JP 30943993 A JP30943993 A JP 30943993A JP 30943993 A JP30943993 A JP 30943993A JP H07159737 A JPH07159737 A JP H07159737A
- Authority
- JP
- Japan
- Prior art keywords
- diopter
- point
- spectacle lens
- power
- fitting point
- 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.)
- Granted
Links
Landscapes
- Eyeglasses (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は老視矯正用眼鏡レンズに
係わり、特に中間距離から近距離を明視するための累進
多焦点レンズに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a presbyopia-correcting spectacle lens, and more particularly to a progressive multifocal lens for making clear vision from an intermediate distance to a short distance.
【０００２】[0002]
【従来の技術】老視の矯正には単焦点レンズやバイフォ
ーカルレンズ、累進多焦点レンズ等が用いられている。
これらの中でも特に累進多焦点レンズは、遠方視時と近
方視時で眼鏡の掛け変えや掛けはずしがいらずまた、見
た目にもバイフォーカルレンズのような境目がなく、そ
の需要はかなり高まってきた。2. Description of the Related Art A monofocal lens, a bifocal lens, a progressive multifocal lens and the like are used to correct presbyopia.
Of these, progressive multifocal lenses in particular do not require the glasses to be changed or removed during distance vision and near vision, and there is no boundary like bifocal lenses in appearance, and the demand for them is increasing considerably. It was
【０００３】しかし累進多焦点レンズには、視野のゆれ
・歪み等の問題があり、さらにはその構造上どうしても
遠中近それぞれの視野が狭く、特に手元から中間距離ま
での視野が必要となる作業では明視できる領域が非常に
狭いため、室内等での使用にはあまり向いていなかっ
た。However, the progressive power multifocal lens has problems such as fluctuation and distortion of the visual field. Further, due to its structure, the visual field of far and near is narrow, and especially the visual field from the hand to the intermediate distance is required. Since the visible area is very small, it was not suitable for indoor use.
【０００４】この様な背景の中で、特開昭６２−１０６
１７に開示された、中間距離から近方視時を重視した設
計の中近両用累進多焦点レンズが注目されてきた。中近
両用累進多焦点レンズは一般の遠近両用累進多焦点レン
ズと比較したとき、ゆれや歪みが少なく、手元から中間
距離までの視野も広く、特に室内では使いやすい眼鏡レ
ンズといわれている。Under such a background, JP-A-62-106
The progressive bifocal lens for bifocals, which is designed to emphasize near vision from an intermediate distance, has been attracting attention. Compared with a general bifocal progressive multifocal lens, the bifocal progressive multifocal lens has less shaking and distortion, and has a wide field of view from the hand to the intermediate distance, and is said to be particularly easy to use indoors.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、特開昭
６２−１０６１７の累進多焦点レンズは、眼鏡装着者の
加入度数により、フィッティングポイント（アイポイン
ト）近傍で明視できる距離が変わってしまうという問題
点がある。However, in the progressive power multifocal lens disclosed in Japanese Unexamined Patent Publication No. 62-10617, the visible distance in the vicinity of the fitting point (eye point) changes depending on the addition power of the spectacle wearer. There is a point.
【０００６】例えば図１のごとく累進多焦点レンズの座
標系を定義し、フィッティングポイントをＯで表し、眼
鏡装着者の遠用処方がＳ０．００ディオプトリー（正
視）だったとする。この時、特開昭６２−１０６１７の
累進多焦点レンズの主子午線上の屈折力の変化は、加入
度数が１．０ディオプトリーの時、図２のＡで示され、
加入度数２．０ディオプトリーの時同図Ｂ、加入度数
３．０ディオプトリーの時Ｃで表される。フィッティン
グポイントでの屈折力は、同図Ｙ＝Ｏの時であり、装着
者の加入度数がＡならば０．４ディオプトリー、Ｂなら
ば０．８ディオプトリー、Ｃならば１．２ディオプトリ
ー、それぞれ遠用屈折力に対し付加されている。従っ
て、加入度数Ａの人はフィッティングポイント近傍で
２．５ｍ、Ｂの人は１．２５ｍ、Ｃの人に至っては０．
８３ｍまでしか明視できないことになる。人間が中間距
離を注視するときの視線は一般的に水平からやや下方に
なるため、特に室内用累進多焦点レンズ又は、中近両用
累進多焦点レンズでは、眼鏡使用者がどの様な加入度数
であっても、フィッティングポイント近傍で、約２ｍ位
先が明視できることが好ましい。特開昭６２−１０６１
７の累進多焦点レンズでは、眼鏡使用者の加入度数が強
くなると、フィッティングポイント近傍で数十センチメ
ートル先しか明視できない。For example, it is assumed that the progressive multifocal lens coordinate system is defined as shown in FIG. 1, the fitting point is represented by O, and the distance prescription of the spectacle wearer is S0.00 diopter (orthotopic). At this time, the change in the refractive power on the main meridian of the progressive power multifocal lens of Japanese Patent Laid-Open No. 62-10617 is shown by A in FIG. 2 when the addition diopter is 1.0 diopter.
When the diopter is 2.0 diopters, it is represented by B in the same figure, and when the diopter is 3.0 diopters, it is represented by C. The refracting power at the fitting point is when Y = O in the same figure, 0.4 diopter if the wearer's addition power is A, 0.8 diopter if B, 1.2 diopter if C, respectively. It is added to the refracting power. Therefore, a person with add power A is 2.5 m near the fitting point, a person with B is 1.25 m, and a person with C is 0.
Only 83 meters can be seen clearly. Since the line of sight of a human being when gazing at an intermediate distance is generally slightly downward from the horizontal, in particular for indoor progressive multifocal lenses or middle-near bifocal progressive multifocal lenses, what kind of addition power a spectacle user uses is However, it is preferable that about 2 m ahead can be clearly seen in the vicinity of the fitting point. Japanese Patent Laid-Open No. 62-1061
With the progressive power multifocal lens No. 7, when the power of addition of the spectacles user becomes strong, only a few tens of centimeters ahead can be seen in the vicinity of the fitting point.
【０００７】本発明の目的はこれらの問題を解決でき
る、中近距離を重視した設計の、眼鏡レンズを提供する
ものである。An object of the present invention is to provide a spectacle lens which can solve these problems and which is designed with emphasis on the short distance.
【０００８】[0008]
【課題を解決するための手段】本発明の眼鏡レンズは、
レンズを構成する２つの屈折面のうち少なくとも１つの
屈折面が、前記レンズのほぼ中央を通る主子午線に沿っ
て累進帯を持ち、前記主子午線上の遠用中心と近用中心
の間で所定の加入度数が付加される眼鏡レンズにおい
て、前記累進帯の開始点と終了点の間にフィッティング
ポイントを有し、かつ前記累進帯の開始点から前記フィ
ッティングポイント近傍までの加入度数の平均勾配と、
前記フィッティングポイント近傍から前記累進帯の終了
点までの加入度数の平均勾配が異なり、かつ前記フィッ
ティングポイントにおける前記眼鏡レンズの屈折力をＦ
Ｐディオプトリー、前記眼鏡レンズの遠用屈折力をＤＰ
ディオプトリーとしたとき、 ０．３＜ＦＰ−ＤＰ＜１．０ （単位：ディオプ
トリー） なる関係が成り立つことを特徴とする。The spectacle lens of the present invention comprises:
At least one of the two refracting surfaces forming the lens has a progressive band along the main meridian passing through substantially the center of the lens, and has a predetermined distance between the distance center and the near center on the main meridian. In the spectacle lens to which the addition power is added, having a fitting point between the start point and the end point of the progressive band, and the average gradient of the addition power from the start point of the progressive band to the vicinity of the fitting point,
The average gradient of the addition power from the vicinity of the fitting point to the end point of the progressive zone is different, and the refractive power of the spectacle lens at the fitting point is F
P diopter, DP for the distance refractive power of the spectacle lens
When the diopter is used, the relationship of 0.3 <FP-DP <1.0 (unit: diopter) is established.
【０００９】本発明の眼鏡レンズは加入度数によらず、
フィッティングポイントにおいて遠用屈折力ＤＰに所定
の屈折力を付加してある。付加すべき所定の屈折力であ
るが、前記眼鏡レンズの遠用屈折力に対し、０．５ディ
オプトリーが好ましい。これはフィッティングポイント
近傍で約２ｍ先が明視できると、普段の生活で違和感無
く使用できるためである。但し使用環境によっては、フ
ィッティングポイント近傍で明視できる距離が、前述値
に対し±１ｍまでは同等の効果があるため、上記の関係
式となる。The spectacle lens of the present invention does not depend on the addition power,
A predetermined refractive power is added to the distance power DP at the fitting point. Although it is a predetermined refractive power to be added, 0.5 diopter is preferable for the distance power of the spectacle lens. This is because if you can see clearly about 2 m ahead of the fitting point, you can use it without any discomfort in your daily life. However, depending on the use environment, the distance that can be clearly seen in the vicinity of the fitting point has the same effect up to ± 1 m with respect to the above value, so the above relational expression is used.
【００１０】[0010]
【実施例】本発明の実施例を図面に基づいて説明する図
３は本発明の眼鏡レンズの座標系を表すものであり、主
子午線をＹ軸に置き、フィッティングポイントをＯ、累
進帯開始点の座標をＰ、累進帯終了点の座標をＱ、眼鏡
レンズ最上端部の座標をＲ、最下端部の座標をＳで示し
てある。図４は本発明の眼鏡レンズの主子午線上の屈折
力の変化の数例を表しており、ＤＰを本発明の眼鏡レン
ズの遠用屈折力としたとき、もし使用者の加入度数が
１．０ディオプトリーならば図中Ａの線で表され、加入
度数が２．０、３．０ディオプトリーならばそれぞれ
Ｂ、Ｃの線で表される。またＦＰは本発明の眼鏡レンズ
のフィッティングポイントＯにおける屈折力を示してい
る。図４において、本発明の眼鏡レンズ使用者は、Ｒか
らＰの領域を通して遠方視を行い、ＱからＳの領域を通
して近方視、そしてＰからＱの間の累進帯で中間距離を
見るわけである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 3 shows the coordinate system of an eyeglass lens of the present invention. The main meridian is placed on the Y axis, the fitting point is O, and the progressive zone start point. , P is the coordinate of the progressive zone end point, Q is the coordinate of the top end of the spectacle lens, and S is the coordinate of the bottom end. FIG. 4 shows several examples of changes in the refracting power on the main meridian of the spectacle lens of the present invention. When DP is the distance refracting power of the spectacle lens of the present invention, the addition power of the user is 1. If it is 0 diopter, it is represented by the line A in the figure, and if the addition diopters are 2.0 and 3.0 diopter, it is represented by the lines B and C, respectively. FP represents the refractive power at the fitting point O of the spectacle lens of the present invention. In FIG. 4, the spectacle lens user of the present invention performs distance vision through the R to P region, near vision through the Q to S region, and an intermediate distance in the progressive zone between P and Q. is there.
【００１１】そしてフィッティングポイントＯにおい
て、眼鏡レンズの遠用屈折力に対し付加されている屈折
力を、加入度数によらず一定にすると、図４でＰからＯ
の勾配も、ＦＰの位置も加入度数によらず一定となり、
ＯからＱの区間で、加入度数により使用者の近用処方ま
で累進的に屈折力が変化する。従って累進帯ＰからＱの
間で、ＰＯ間の屈折力勾配と、ＯＱ間の屈折力勾配は原
則として変わってくるのが特徴となる。At the fitting point O, if the refractive power added to the distance power of the spectacle lens is made constant irrespective of the addition power, P to O in FIG.
The slope of and the position of FP are constant regardless of the addition power,
In the section from O to Q, the refractive power progressively changes to the user's near prescription depending on the addition power. Therefore, as a general rule, the refractive power gradient between PO and OQ between the progressive zones P to Q changes.
【００１２】また屈折力の勾配は図４の様に直線でなく
とも、図５に示すごとく曲線状になっていても同等の効
果が期待できる。Even if the gradient of the refractive power is not a straight line as shown in FIG. 4 but a curved line as shown in FIG. 5, the same effect can be expected.
【００１３】図６に、一例として遠用屈折力Ｓ０．００
ディオプトリー、加入度数３．０ディオプトリーの、本
発明の眼鏡レンズの主子午線上の屈折力の変化及び、累
進帯の長さ等、具体的な値として示した。累進帯はフィ
ッティングポイントＯの１０ｍｍ上から始まり、フィッ
ティングポイントＯの１５ｍｍ下まで、２５ｍｍとって
ある。これは屈折力勾配をできる限り緩やかにとること
により、ゆれや歪みを抑え、かつ遠用部領域、近用部領
域を確保するためである。フィッティングポイントＯで
は、遠用屈折力に対し０．５ディオプトリーの付加なの
で、使用者は２ｍ先が明視でき、それより遠くは視線を
やや上にすることにより、近くは下にすることにより見
ることができるので室内での生活環境に非常に適してい
る。FIG. 6 shows, as an example, the distance power S0.00.
The values are shown as specific values such as the change in the refractive power on the main meridian of the spectacle lens of the present invention with a diopter and an addition diopter of 3.0 diopters, and the length of the progressive zone. The progressive zone starts 10 mm above the fitting point O and extends 25 mm down to 15 mm below the fitting point O. This is because the gradient of the refractive power is made as gentle as possible to suppress the fluctuation and distortion and to secure the distance portion area and the near portion area. At the fitting point O, 0.5 diopters are added to the distance refractive power, so the user can see clearly at a distance of 2 m, and if the distance is further than that, the line of sight is slightly above and the near is below. Therefore, it is very suitable for indoor living environment.
【００１４】[0014]
【発明の効果】以上の如く、本発明の眼鏡レンズによれ
ば、眼鏡使用者の遠用処方や加入度数によらず、フィッ
ティングポイント近傍において約２ｍ先を明視でき、中
間距離から手元まで非常に広い視野を得ることができ
る。As described above, according to the spectacle lens of the present invention, it is possible to clearly see about 2 m ahead in the vicinity of the fitting point regardless of the distance prescription and the addition dioptric power of the spectacle user, which is extremely effective from the intermediate distance to the hand. You can get a wide field of view.
【図１】累進多焦点レンズの座標系を示した平面図。FIG. 1 is a plan view showing a coordinate system of a progressive multifocal lens.
【図２】特開昭６２−１０６１７の主子午線上の屈折力
変化図。FIG. 2 is a diagram showing a change in refracting power on the main meridian of JP-A-62-10617.
【図３】本発明の眼鏡レンズの座標系を示した平面図。FIG. 3 is a plan view showing the coordinate system of the spectacle lens of the present invention.
【図４】本発明の眼鏡レンズの主子午線上の屈折力変化
図。FIG. 4 is a diagram showing a change in refracting power on the main meridian of the spectacle lens of the present invention.
【図５】本発明の眼鏡レンズの主子午線上の屈折力変化
図。FIG. 5 is a diagram showing a change in refracting power on the main meridian of the spectacle lens of the present invention.
【図６】本発明の眼鏡レンズの主子午線上の屈折力変化
図。FIG. 6 is a diagram showing a change in refracting power on the main meridian of the spectacle lens of the present invention.
Ｏ ・・・・・フィッティングポイント（アイポイン
ト） Ｐ ・・・・・累進帯開始点 Ｑ ・・・・・累進帯終了点 Ｒ ・・・・・眼鏡レンズ最上端部 Ｓ ・・・・・眼鏡レンズ最下端部 ＤＰ・・・・・遠用屈折力 ＦＰ・・・・・フィッティングポイントにおける屈折力 Ａ ・・・・・加入度数１．０ディオプトリーの時の主
子午線上の屈折力変化 Ｂ ・・・・・加入度数２．０ディオプトリーの時の主
子午線上の屈折力変化 Ｃ ・・・・・加入度数３．０ディオプトリーの時の主
子午線上の屈折力変化O ・ ・ ・ Fitting point (eye point) P ・ ・ ・ Progressive zone start point Q ・ ・ ・ Progressive zone end point R ・ ・ ・ Eyeglass lens top end S ・ ・ ・ Eyeglass Bottom end of lens DP: distance power FP: power at fitting point A: refractive power change along the main meridian at addition diopter of 1.0 diopter B ..・ ・ ・ Change in refractive power on the main meridian at add power of 2.0 diopters C ・ ・ ・ Change in refractive power on main meridian at add power of 3.0 diopters
Claims (1)
くとも１つの屈折面が、前記レンズのほぼ中央を通る主
子午線に沿って、曲率半径が累進的に変化する領域（以
下累進帯と呼ぶ）を持ち、前記主子午線上の遠用中心と
近用中心の間で所定の加入度数が付加される眼鏡レンズ
において、前記累進帯の開始点と終了点の間にフィッテ
ィングポイントを有し、かつ前記累進帯の開始点から前
記フィッティングポイント近傍までの加入度数の平均勾
配と、前記フィッティングポイント近傍から前記累進帯
の終了点までの加入度数の平均勾配が異なり、かつ前記
フィッティングポイントにおける前記眼鏡レンズの屈折
力をＦＰディオプトリー、前記眼鏡レンズの遠用屈折力
をＤＰディオプトリーとしたとき、 ０．３＜ＦＰ−ＤＰ＜１．０ （単位：ディオプ
トリー） なる関係が成り立つことを特徴とする眼鏡レンズ。1. A region where at least one of the two refracting faces constituting the lens has a progressively changing radius of curvature along a main meridian passing through substantially the center of the lens (hereinafter referred to as a progressive zone). ), And a fitting point between the start point and the end point of the progressive band, in a spectacle lens to which a predetermined addition power is added between the distance vision center and the near vision center on the main meridian, and The average gradient of the addition power from the start point of the progressive zone to the vicinity of the fitting point and the average gradient of the addition power from the neighborhood of the fitting point to the end point of the progressive zone are different, and of the spectacle lens at the fitting point. When the refractive power is FP diopter and the distance refractive power of the spectacle lens is DP diopter, 0.3 <FP-DP <1.0 (unit Spectacle lens characterized by dioptre) the relationship is established.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30943993A JP3853849B2 (en) | 1993-12-09 | 1993-12-09 | Eyeglass lenses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30943993A JP3853849B2 (en) | 1993-12-09 | 1993-12-09 | Eyeglass lenses |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07159737A true JPH07159737A (en) | 1995-06-23 |
| JP3853849B2 JP3853849B2 (en) | 2006-12-06 |
Family
ID=17993015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30943993A Expired - Lifetime JP3853849B2 (en) | 1993-12-09 | 1993-12-09 | Eyeglass lenses |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3853849B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008065358A (en) * | 2007-11-28 | 2008-03-21 | Tokai Kogaku Kk | Progressive refractive power lens |
| WO2016190391A1 (en) * | 2015-05-26 | 2016-12-01 | ホヤ レンズ タイランド リミテッド | Method of designing progressive refractive power lens, and lens set |
| WO2018100577A1 (en) * | 2016-11-29 | 2018-06-07 | Shamir Optical Industry Ltd. | Ophthalmic lens |
| US10545354B2 (en) | 2015-05-26 | 2020-01-28 | Hoya Lens Thailand Ltd. | Designing method and designing device for progressive power lens |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107121790A (en) * | 2017-06-16 | 2017-09-01 | 沈华豹 | Progressive multi-focal point type eyeglass |
-
1993
- 1993-12-09 JP JP30943993A patent/JP3853849B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008065358A (en) * | 2007-11-28 | 2008-03-21 | Tokai Kogaku Kk | Progressive refractive power lens |
| WO2016190391A1 (en) * | 2015-05-26 | 2016-12-01 | ホヤ レンズ タイランド リミテッド | Method of designing progressive refractive power lens, and lens set |
| JPWO2016190391A1 (en) * | 2015-05-26 | 2018-03-15 | ホヤ レンズ タイランド リミテッドＨＯＹＡ Ｌｅｎｓ Ｔｈａｉｌａｎｄ Ｌｔｄ | Progressive power lens design method and lens set |
| US10401649B2 (en) | 2015-05-26 | 2019-09-03 | Hoya Lens Thailand Ltd. | Method of designing progressive refractive power lens, and lens set |
| US10545354B2 (en) | 2015-05-26 | 2020-01-28 | Hoya Lens Thailand Ltd. | Designing method and designing device for progressive power lens |
| WO2018100577A1 (en) * | 2016-11-29 | 2018-06-07 | Shamir Optical Industry Ltd. | Ophthalmic lens |
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