JPS59107322A - Progressive multifocus lens - Google Patents

Progressive multifocus lens

Info

Publication number
JPS59107322A
JPS59107322A JP21800482A JP21800482A JPS59107322A JP S59107322 A JPS59107322 A JP S59107322A JP 21800482 A JP21800482 A JP 21800482A JP 21800482 A JP21800482 A JP 21800482A JP S59107322 A JPS59107322 A JP S59107322A
Authority
JP
Japan
Prior art keywords
prism
lens
chromatic aberration
prescription
use part
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
Application number
JP21800482A
Other languages
Japanese (ja)
Other versions
JPH0239769B2 (en
Inventor
Shunei Shinohara
俊英 篠原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP21800482A priority Critical patent/JPH0239769B2/en
Priority to US06/557,978 priority patent/US4606626A/en
Priority to FR8319578A priority patent/FR2545615B1/en
Priority to DE3345076A priority patent/DE3345076C3/en
Publication of JPS59107322A publication Critical patent/JPS59107322A/en
Publication of JPH0239769B2 publication Critical patent/JPH0239769B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02CSPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00Optical parts
    • G02C7/02Lenses; Lens systems ; Methods of designing lenses
    • G02C7/06Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive
    • G02C7/061Spectacle lenses with progressively varying focal power

Landscapes

  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Eyeglasses (AREA)

Abstract

PURPOSE:To obtain a good field of view without making a chromatic aberration of a near use part perceptive by making a prism prescription whose base bottom direction is 90 degrees, which does not aim at a diagonal view correction, in the near use part of a progressive multifocus lens. CONSTITUTION:A prism prescription whose base bottom direction is 90 degrees, which does not aim at a diagonal view correction is applied equally to left and right lenses as shown by a full line, to the near use part of a progressive multifocus lens having a near view correcting prescription in a far use part area shown by a dotted line in the figure. In a graph for showing a prism distribution, a vertical axis and the right direction of a horizontal axis show a lens position and a prism quantity Pup of 90 degrees of the base bottom direction, respectively, but by inserting a prism Pt of 90 degrees of the base bottom direction, the prism quantity increases at a position A of the far use part, but no chromatic aberration is perceived within Pg of a chromatic aberration limit, and it made equal to the limit quantity Pg, therefore, no chromatic aberration of the near use part is perceived, and a good field of view can be obtained.

Description

【発明の詳細な説明】 本発明は連用都′唄域に近視矯正の7こめの処方を有す
る累進多焦点レンズに関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a progressive multifocal lens having a prescription for myopia correction in the continuous use area.

不発明の目的は、累進多焦点レンズの近用部領域での色
収差を改善することにある。′=1:た他の目的はレン
ズの薄形化および峨量化にある。
An object of the invention is to improve chromatic aberration in the near vision region of a progressive multifocal lens. '=1: Another purpose is to make the lens thinner and thicker.

現在、眼鏡は私たちの日濱生活になくてはならないもの
となっている。現在心安がない人でも、やがて老いた時
には老視となるため、老眼鏡のお世話になることになる
、こうして眼鏡は私たちの生ン古に深い関わりをもって
いるわけであるが、この眼鏡のレンズとして1ず要求さ
れることは便つ窺ときによく見えることであり、史には
薄いこと、軽いこと、フアツシヨン性に豊むこと、傷つ
き難いこと等が挙げられる。このような観点力)ら従来
様々なレンズ素材の開発が−3:aH品として市場に出
ている。し刀為し、現在のところ先に述べたような条件
の移でを満足さ一+!:るようなものにない。といつの
は、薄くという条件を満7こ丁ためには素材の屈折率が
大きいことが心安であるが、屈折率が大きいことが必要
であるが、屈折率が旨い素材は概してアツベ数が小さく
、レンズの同辺音便って物を見たとき11+4郭かにじ
んで色付いて見える、いわゆる色収差が発生する1ζめ
である。この色収差は、一般の近視あるいは遠視全規正
する単焦点レンズではあ丑りポ袂な問題とはならない。
Nowadays, glasses have become an indispensable part of our daily life. Even people who don't feel safe now will eventually develop presbyopia when they get older, so they will need reading glasses.In this way, glasses have a deep connection with our origins. The first requirement is that it be easily visible, and that it should be thin, light, highly fashionable, and resistant to scratches. Based on this perspective, various lens materials have been developed and are now on the market as -3:aH products. As of now, I am satisfied with the transfer of the conditions mentioned above! : There is nothing like that. In order to satisfy the condition of thinness, it is safe to have a material with a high refractive index, but it is necessary to have a high refractive index, but materials with a good refractive index generally have a small Atsube number. , when you look at an object with the isolateral tone of a lens, it appears colored due to the 11+4 square, which is the 1ζth lens, where so-called chromatic aberration occurs. This chromatic aberration is not a serious problem with ordinary single-focal lenses that fully correct for nearsightedness or farsightedness.

というのは、晋通私たちが眼mk便うときそのレンズの
周辺の部分はほとんど団わずに、中心の近く?使つ〃゛
らである。しかし、累進多焦点レンズの場合は色収差が
M要な問題となる、といつのは、累進多焦点レンズには
、遠くケ見るための領域(遠用部領域)と近くを見る7
ζめの領域(近用部領域)とその中間距離のものを見る
ための領域(中間部領域)が有り、その近用部領域はレ
ンズ中心より下方に15〜25順離れた位置にあり、そ
の部分では色収差が者しく現われるからである。このた
め、従来尚屈折率の素材は累進多焦点レンズには殆んど
1史われな刀1つた、本発明は、このような累進多焦点
レンズの近用部の色収差を改善するものであり、これに
よV従来1史えな刀1った尚屈折率の素材の使用が可能
となり、薄く、軽いレンズが実現可能となる。
This is because when we use the lens, the peripheral part of the lens is hardly clustered, and the lens is near the center. They are the ones who use it. However, in the case of progressive multifocal lenses, chromatic aberration becomes an important problem.The progressive multifocal lens has an area for far vision (distance area) and a 7 area for near vision.
There is a ζth area (near area) and an area (intermediate area) for viewing things at an intermediate distance between the two, and the near area is located 15 to 25 degrees below the center of the lens. This is because chromatic aberration clearly appears in that area. For this reason, conventional materials with a refractive index have hardly ever been used in progressive multifocal lenses.The present invention improves the chromatic aberration in the near vision area of such progressive multifocal lenses. This makes it possible to use a material with a refractive index lower than that of conventional lenses, making it possible to create thinner and lighter lenses.

以下、本発明を詳細に説明丁ゐ。The present invention will be explained in detail below.

第1図は遠用部狽域に近視矯正処方をもった従来の累進
多焦点レンズの垂直断面形状を示す。図中の三角形に各
位置でのプリズム?示し、大きさによりプリズム量ケ、
向きによって基ノ威万同を示している。そのプリズムを
より詳しく表わしたものが第2図である。図の縦軸にレ
ンズ垂直断面上の位置で、0ぽフィッティング・ポイン
ト(目の正面位置)、AおよびBはそれぞれ眼鏡として
使用されるレンズ上端および下端である。記号は第1図
と共遡。0から上方A1では遠用部領域内の部分、下方
C’lでか中間部領域内の部分、更にCよジ下方B葦で
は近用部領域V]の部分である、横軸はプリズムを示し
、縦111に中ノしに右方向は基匠万同が9o Oのグ
リズ、l−量11”upケ、左方向は基底方間が270
’のプリズムit Pdn k示す。単焦点レンズの場
合のレンズ上の各位置でのプリズム量Pはつぎの式+1
+により近似的に求めることができる。
FIG. 1 shows a vertical cross-sectional shape of a conventional progressive multifocal lens having a myopia correcting prescription in the distance vision zone. Prism at each position in the triangle in the figure? The amount of prism depends on the size.
Depending on the direction, it shows the power of power. FIG. 2 shows the prism in more detail. The vertical axis of the figure indicates the position on the vertical cross section of the lens, and the 0-point fitting point (position in front of the eye), A and B are the upper and lower ends of the lens used as eyeglasses, respectively. Symbols trace back to Figure 1. 0 to upper A1 is the part in the distance region, lower C'l is the part in the intermediate region, and further from C to lower B is the part in the near vision region V. The horizontal axis represents the prism. 111 vertically, with the middle part on the right side, the base is 9o O, the l-amount is 11" up, and on the left, the base distance is 270
' prism it Pdn k. In the case of a single focus lens, the amount of prism P at each position on the lens is calculated by the following formula +1
It can be approximately determined by +.

P= PW X h     −−−−(1)ここでP
Wはレンズの度数(単位はディオプトIJ−)、hは光
学中lしく通常、光学中Iしはフィッティングポイント
とほぼ一致丁/))刀≧らの距離(単位はcrn )で
ある。累進多焦点レンズの場合は図のように、遠用都狽
域においてほぞの全域がほぼレンズ処方1jePWとな
ってぃゐ1この、そのプリズムtユ式(1)による近似
丁ゐことができるが、中間部領域および近用部領域にお
いては、中間部領域o′fJ−らCにかけて度数が漸矢
瑠加し近用部領域では加入1i(ADD)だけ壇刀nし
1cはぼ一定の度シタ(PW十ADD)となるため、そ
のフ゛リズムげ−p w x hの1灯影メ71’ら(
FW+ADD)Xhの1区線に徐々に近づく形の分布と
なる。
P= PW X h -----(1) where P
W is the power of the lens (in diopters IJ-), and h is the distance (units are crn), which is usually approximately the same as the fitting point in optics. In the case of a progressive multifocal lens, as shown in the figure, the entire area of the tenon in the distance range is approximately the lens prescription 1jePW.This can be approximated by the prism equation (1). , in the intermediate region and the near vision region, the power increases gradually from intermediate region o'fJ to C, and in the near vision region, the power increases by an addition 1i (ADD), and 1c has a nearly constant power shift. (PW 0 ADD), so the film ge-p w x h 1 light shadow mem 71' etc. (
The distribution gradually approaches the 1st section line of FW+ADD)Xh.

さて、レンズの色収差にレンズ素材のアツベ数νとプリ
ズム、t Pによりその大きさ工合表わ丁ことができ、
式(2)のようになる。
Now, the size of the chromatic aberration of the lens can be expressed by the Atsbe number ν of the lens material, the prism, and tP,
It becomes as shown in equation (2).

ニー−・・・・・・(2) 一般に色収差が知寛さ扛るのは、 ニー−〉02・・・・・(3) であることが知られている。逆に言えば、レンズが眼鏡
レンズとして色収差の影響なく使用されるための条件は
、レンズの眼―酩としての1史用範囲におぐる色収差が 工;”−<0.2  ・・・・・・(4)の関係勿満7
ζ丁ことである。
Knee...(2) Generally, it is known that chromatic aberration is more sensitive when the Knee is 02...(3). Conversely, the condition for a lens to be used as an eyeglass lens without the influence of chromatic aberration is that the chromatic aberration of the lens falls within the range of its history as an eye-drinker; ...Relationship of (4) Nakman 7
It is ζ ding.

累進多焦点レンズにおいては、プリズム量が最大となゐ
のは遠用都・領域ではレンズ反相上端AでのプリズムP
a、近用部′呟域で(1マレンズ使用下端Bでの)“リ
ズムPbであるが、第2図刀1ら解方Sるエラに下端B
は上端Aに比べ光学中心よりの距離が倍近くある7この
、Pb>Pa(7)関係がある。従ってアツベ数が不埒
な素材ではまず近用都領域において色収差が発生する。
In a progressive multifocal lens, the maximum amount of prism is the prism P at the upper end A of the lens in the distance zone.
a, in the near area 'rhythm Pb (at the lower end B when using 1 lens), but the lower end B
The distance from the optical center is almost twice that of the upper end A7, and there is a relationship Pb>Pa (7). Therefore, in a material with an unreasonable Atsbe's number, chromatic aberration occurs first in the near viewing area.

つ19色収差が知覚される限界のプリズム11;ごPg
とすると、PgはP g = 0.2 xν ・・・・
・・(5)で求めらnX−屈率素材のようにνがあゐ程
度小さくなると第2因に示すように近用部禎域のD〜B
の間はプリズム量が限界量Pgを嬢えてし1い(遠用部
唄域ではPg以下に入っている)、近川都頌域のD−B
の間に色収差が知覚されるようになる。
19 The limit prism 11 where chromatic aberration is perceived;
Then, Pg is P g = 0.2 xν...
...When ν is reduced to a certain extent as in the nX-refractive index material found in (5), the near vision area D to B as shown in the second factor.
During the period, the amount of prism is less than the limit amount Pg (it is below Pg in the distance area), and the D-B in the Chikakawa Miyako area.
Chromatic aberration becomes perceptible between.

つきに、不発明の実力6例をボ丁、、第3図は本発明に
よゐ近視焔正処方勿もつ7こ累進多焦点レンズの垂直断
面である。図中の表現方法は第1凶と同様であるが、比
軟のために第1図に示した従来例全破線によりボア。本
発明の特徴は、図示の如く−MUM方向ψo0のプリズ
ム処方がされていることであり、このプリズム処方は斜
視矯正上目B’Jとするものでなく、眼鏡の左右レンズ
に等しく流下ものである。、第7I図は本実施例におげ
ゐプリズムをより詳しく表わし/こもので、表現の方法
は第2図と同様である。図中の破緋q比較のために入れ
た第2図に示f従来列のものである。図のように基1氏
方向q o Oのプリズムpt7入れることにより、遠
用部領域ではその分だけプリズムが瑠刀口し、近用部領
域でにその分だけプリズムが減少する。このプリズムの
増減は、ぞの筐ま色収差のRI減を意味する刀)ら、遠
用部唄城では色収雁が増加し近用部領域では色収差が減
少する。本実施例に2いては近用部領域の使用下端Bに
おけるプリズム量pbと色収差が知覚される限界のプリ
ズム重Pgが等しくなるようにPt會決定している1ζ
め、近用部鎖酸の使用範囲内において色収差に矧寛され
なく良好な視野が得られる。このときに注目すべきこと
は、遠用部領域の色収差である。遠用部狽域においては
90°万同に基J底τもつプリズムの付加によりプリズ
ムが増加する1こめ色収差的に悪くなることは先に述べ
/こところであるが、第4図から解方)るように通常遠
用部領域の使用上端1での距離OAはあオシ畏〈ない(
10〜15弧)であるため、その上端Aにおけるプリズ
ムPaがプリズム増加により限界値Pgヶ越えることは
殆んどない。
Finally, here are six examples of the uninvented ability. Figure 3 is a vertical cross section of a seven point progressive multifocal lens with myopia correction prescription according to the present invention. The method of representation in the figure is the same as the first example, but for relative softness, all broken lines in the conventional example shown in Figure 1 are used to represent the bore. The feature of the present invention is that, as shown in the figure, the prism prescription is in the -MUM direction ψo0, and this prism prescription is not intended to correct strabismus in the upper eye B'J, but to flow equally to the left and right lenses of the glasses. be. , FIG. 7I shows the prism of this embodiment in more detail, and the method of representation is the same as that in FIG. 2. Figure 2 shows the conventional column f shown in Fig. 2, which is included for comparison. By inserting the prism pt7 in the base direction q o O as shown in the figure, the prism becomes more rounded in the distance vision region, and decreases in the near vision region by that amount. This increase/decrease in the prism means a decrease in RI of the chromatic aberration of the lens.In addition, chromatic aberration increases in the distance vision area, and chromatic aberration decreases in the near vision area. In this embodiment 2, the Pt ratio is determined so that the prism amount pb at the lower end B of use in the near vision area is equal to the prism weight Pg at the limit where chromatic aberration is perceived.
Therefore, a good field of vision can be obtained without being affected by chromatic aberration within the range of use of the near chain acid. What should be noted at this time is chromatic aberration in the distance region. As mentioned earlier, in the far vision range, adding a prism with a base J base τ at 90 degrees will increase the number of prisms, which will worsen the chromatic aberration. As shown in the figure, the distance OA at the upper end 1 of the distance vision area is not good (
10 to 15 arcs), the prism Pa at the upper end A hardly exceeds the limit value Pg due to an increase in prisms.

従って遠用部狽域においても色収差は知覚されず良好な
視野が得られる。
Therefore, no chromatic aberration is perceived even in the far vision range, and a good visual field can be obtained.

以上に説明し1ζ如く本発明は、基底方向90°のプリ
ズムを流下ことによジ、近用部領域での色収走全改皆す
ることでシ)るが、流下プリズムの蛍は次のように決足
される。
As explained above, the present invention completely changes the color acquisition in the near vision area by flowing down a prism with a base direction of 90°, but the firefly in the falling prism is It is determined that

近用部狽域下端Bでのプリズムの大きさはpb汀、近似
的に次式で与えられる。
The size of the prism at the lower end B of the near vision area is pb, approximately given by the following equation.

Pb=(PWxADD)xo丁 ここで下(・10とBの距離(m)、これに基底方向’
/(]0のグリスムPt七付v−yゐとB点でのプリズ
ムは、 b−pt となり、これが色収差が出ないための条注式(4)に代
入し、変形すると Pt >P b −0,2x y= (FW+AD D
 )xOB−0,2xν(に変形すると Pt>Kx (PW十ADD)−0,2xν ・・・・
・(5)ここで に−面=1.5〜25 係叙には距離OBを表ゎ丁ものであり、レンズの設計お
よび使用者のレンズ上の使用範囲の個人差により上記の
ような範囲紮もつ。
Pb = (PWxADD)
/(]0 Grissum Pt7 attached v-yi and the prism at point B is b-pt. Substituting this into the equation (4) to avoid chromatic aberration, and transforming it, Pt > P b - 0,2x y= (FW+AD D
)xOB-0,2xν(When transformed into Pt>Kx (PW0ADD)-0,2xν...
・(5) Here - plane = 1.5 ~ 25 The distance OB is listed here, and the above range may vary depending on the lens design and individual differences in the user's usage range on the lens. Motsu.

式(5)により決足されゐPtが大き過ぎて、視覚上の
障@を生じノζり、遠用@SS戦域大きな色収差を発生
丁/S場合には、ptを式(5)のものより小さくとり
、レンズに薫系統あるいは茶系統あるいは青系統の層色
全することにより、色収差的に良好なレンズケ得ること
ができる、といつのは、色収差として人が知覚するのは
、物の輪郭に出る黄色と青色のttjhであり、プリズ
ムPtの付カロにより消しされないこの色収左會黄系統
あるいは茶系統あるいは青系統のレンズの増色により知
覚しにくくできるからである、 以上述べた色収麦面での効果の他に、本発明にばレンズ
の薄形化、軽量化の効果がある、第6図の従来のものと
本発明によ/Dものの断面の比較により明ら7J)なよ
うに、基底方向q UOのプリズムの付加により遠用部
類域側ではレンズがNJ<なり、近用部類域側ではレン
ズが博ぐなゐ。従ってレンズとしては遠用部類域側での
増加と近用部類域側での減少が相殺されるため、薄形化
、軽量化の効果はない。しかし眼鋭フレームに入れた状
態では遠用部領域と中1…都唄域および近用部領域との
面積的な比率はほぼ1:2程度であるので、眼鏡とした
ときにば全体として博<、1¥iいレンズとなる。
If Pt is determined by equation (5) to be too large, causing visual impairment and causing large chromatic aberrations for distance vision, then pt is determined by equation (5). By making the lens smaller and filling the lens with a dark, brown, or blue color layer, it is possible to obtain a lens with good chromatic aberration.What humans perceive as chromatic aberration is the difference in the contours of objects. This is because the yellow and blue colors that appear are difficult to perceive due to the yellow, brown, or blue lenses that are not erased by the addition of the prism Pt. In addition to the effect on the surface, the present invention also has the effect of making the lens thinner and lighter, as is clear from the comparison of the cross sections of the conventional lens and the lens according to the present invention shown in FIG. 7J). By adding a prism in the base direction q UO, the lens becomes NJ< on the distance range side, and the lens becomes wider on the near vision range side. Therefore, as a lens, the increase in the distance zone and the decrease in the near zone are offset, so there is no effect of making the lens thinner or lighter. However, when placed in an eye-accurate frame, the area ratio of the distance vision area to the intermediate vision area and the near vision area is approximately 1:2, so when worn as glasses, the area as a whole becomes wide. <, it becomes a 1 yen i expensive lens.

以上述べたv口<本発明によれば、累進多焦点ンンズ、
竹にアツベ叔の小さい訓屈折率素材?使った累進多焦点
レンズにおいて、近用部領域での色収差が改善さfると
ともに、薄形化、軽量化7図ることができ/S。
According to the present invention, progressive multifocal lenses,
Bamboo with small refractive index material? In the progressive multifocal lens used, chromatic aberration in the near vision area has been improved, and it has also been made thinner and lighter.

なおプリズムの基底方間が9 Q Oより若干ずtする
ものについても不発明の効果が得られ、不発明の範囲を
越えるものではない。
It should be noted that even if the base distance of the prism is slightly different from 9 Q O, the non-inventive effect can be obtained and it does not go beyond the non-inventive scope.

【図面の簡単な説明】[Brief explanation of drawings]

用1図は、tE米の近視矯正処方を有する累進多焦点レ
ンズの断面図。 第2図は、化1図のレンズのン“リズム分布を示す図。 第3図は、本発明による近視矯正処方を肩1−る累進多
焦点レンズの断面図。 第4図は、第3図のレンズのプリズム分布を示す図。 dU2号の説明 O・・・フィッティングポイント A・・レンズの便用上端位置 B・・・レンズの1史用下端位置 C・・中間部惧域と近用部狽域の境界 、Pup・・・基ノ=方向90°のプリズムPdn・・
・基底方間270°のプリズムPR・・・色収走の生ず
ゐ限界のグリズム量以上 第1図 CPW+ADD)xA  第2図 手続補正書(自発) 1. if件の表示 昭和57年特許願第 218004 @2 !′ご明の
3称 累進多焦点レンズ 3、補正をり−る名 (256)株式会社 諏訪精工舎 4、4e j’l! い  代表鞠役中村恒也5 補正
lこより増加する発明の数 α 手続補正書(自発) 1、特許請求の範囲を別紙の如く補正する。 2、明細書2頁下から1行目〜5頁1行目、「必要であ
るが、屈折率が大きいことが必要であるが、屈折率が」
とある全、 「必要であるが、屈折率が」に補正する。 6、 明細書9頁2行目 「pb=(PWXAI)D )X下1Jとある金、「p
b=−(PWXADD)Xて1」に補正する。 4、明細書9頁9行目、 「pt)pb−0,2XV=(PW+ADD)×百−0
,2XMJ とある金、 rPt>T)b−0,2XV=−(FW+ADD)XO
B−0,2XVJに補正する。 5、 明細書9負11行目、 rpt>x;x(pw−IADD)−0,2XVJとあ
る全、 rpt>−xr(pw+ADD)−o、zxv」に補正
する。 〆 特許請求の範囲 (1)  遠用部領域に近視矯正用の処方を有する累進
多焦点レンズにおいて、斜視矯正を、目的としない基底
方向90度のプリズム処方を施したことを特徴とする累
進多焦点レンズ。 (2)  前記プリズム処方の大きさptが、好ましく
は前記レンズの素材のアツベ数ケν、遠用部領域の近視
矯正処方全pw、加入度1ADDとしたとき、 pt〉旦(PW+ADD)−0,2xν15≦に≦2.
5 なる関係を満たすことを特徴とする特許請求の範囲第1
項に記載の累進多焦点レンズ。 (3) 黄系統、または茶系統または青系統の着色をし
たことを特徴とする特許請求範囲第1項顛記載の累進多
焦点レンズ。
Figure 1 is a cross-sectional view of a progressive multifocal lens having a tE myopia correction prescription. FIG. 2 is a diagram showing the rhythm distribution of the lens shown in FIG. Diagram showing the prism distribution of the lens shown in the figure. Explanation of dU2 O... Fitting point A... Upper end position of the lens for convenience B... Lower end position of the lens for 1st history C... Intermediate region and near vision Boundary of the banished area, Pup... Prism Pdn with base direction = 90°...
・Prism PR with base distance of 270°...The amount of grism is at least the limit for color aggregation (Figure 1 CPW+ADD)xA Figure 2 Procedural amendment (voluntary) 1. If displaying 1982 patent application No. 218004 @2! 'Your 3rd order progressive multifocal lens 3, correction name (256) Suwa Seikosha Co., Ltd. 4, 4e j'l! Representative Director Tsuneya Nakamura 5 Amendment 1 The number of inventions will increase α Procedural amendment (voluntary) 1. The scope of the claims will be amended as shown in the attached sheet. 2. Line 1 from the bottom of page 2 of the specification to line 1 from page 5, "It is necessary, but it is necessary that the refractive index is large, but the refractive index is large."
In some cases, it is necessary to correct the refractive index. 6. The gold that says ``pb=(PWXAI)D)X lower 1J'' on page 9 line 2 of the specification
b=-(PWXADD)X to 1". 4. Specification page 9, line 9, “pt) pb-0,2XV=(PW+ADD)×100-0
,2XMJ A certain gold, rPt>T)b-0,2XV=-(FW+ADD)XO
Correct to B-0,2XVJ. 5. Negative line 11 of specification 9, rpt>x; x (pw-IADD) - 0, 2 〆 Claims (1) A progressive multifocal lens having a prescription for myopia correction in the distance region, characterized in that a prism prescription of 90 degrees in the basal direction is not intended for strabismus correction. focal lens. (2) When the size pt of the prism prescription is preferably the number of layers of the lens material ν, the total myopia correction prescription for the distance vision area pw, and the addition power 1ADD, then pt〉〉〉(PW+ADD)−0 , 2xν15≦≦2.
Claim 1, which is characterized by satisfying the following relationship:
The progressive multifocal lens described in section. (3) The progressive multifocal lens according to claim 1, which is colored yellow, brown, or blue.

Claims (3)

【特許請求の範囲】[Claims] (1)遠用都頂域に近視矯正用の処方全Mする累進多焦
点レンズにおいて、斜視矯正全目的としない基ノ圧万同
90此のプリズム処方ケ施し7ζことケ特徴とする累進
多焦点レンズ。
(1) A progressive multifocal lens with a prescription for nearsightedness correction in the distance apex area, which is not intended for strabismus correction and has a base pressure of 90%.The prism prescription is 7ζ. lens.
(2)  AiJiff、ニブリズム処方の大きさPt
が、好ブレ〈は前記レンズの素材のアツベ狭をν、遠用
部唄域の近視矯正処方kpw、〃a入藺全、A I) 
Dとしたとき、 1?t >Kx (PW十ADDノーG、2×ν1.5
≦に≦2,5 なる関係金@7こ丁こと全1イ徴とする特許請求範囲第
1項に記載の累進多焦点レンズ。
(2) AiJiff, size of nibrism prescription Pt
However, the favorable blur is the narrowness of the material of the lens, ν, the myopia correction prescription for the distance zone, KPW, A I)
When it is D, 1? t > Kx (PW 10 ADD no G, 2 x ν1.5
≦≦≦2.5 The progressive multifocal lens according to claim 1, which has a relationship of ≦2.5.
(3)  黄系統、または茶系統捷たは青系統の庸色を
したことを%悼とする峙計請求小以囲第1項に記載の累
進多焦点レンズ。
(3) The progressive multifocal lens according to item 1, characterized in that it has a yellowish, brownish, or blueish color.
JP21800482A 1982-12-13 1982-12-13 RUISHINTASHOTENRENZU Expired - Lifetime JPH0239769B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP21800482A JPH0239769B2 (en) 1982-12-13 1982-12-13 RUISHINTASHOTENRENZU
US06/557,978 US4606626A (en) 1982-12-13 1983-12-05 Progressive multifocal ophthalmic lenses with prism for correcting chromatic aberration
FR8319578A FR2545615B1 (en) 1982-12-13 1983-12-07 PROGRESSIVE MULTIFOCAL OPHTHALMIC LENS
DE3345076A DE3345076C3 (en) 1982-12-13 1983-12-13 Spectacle lens with a varifocal surface, the far part being designed to correct myopia

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21800482A JPH0239769B2 (en) 1982-12-13 1982-12-13 RUISHINTASHOTENRENZU

Publications (2)

Publication Number Publication Date
JPS59107322A true JPS59107322A (en) 1984-06-21
JPH0239769B2 JPH0239769B2 (en) 1990-09-07

Family

ID=16713113

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21800482A Expired - Lifetime JPH0239769B2 (en) 1982-12-13 1982-12-13 RUISHINTASHOTENRENZU

Country Status (1)

Country Link
JP (1) JPH0239769B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006018879A1 (en) * 2004-08-19 2006-02-23 Menicon Co., Ltd. Multifocus colored contact lens and method for manufacturing the same
JP3852116B2 (en) * 1995-11-24 2006-11-29 セイコーエプソン株式会社 Progressive multifocal lens and spectacle lens

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69133517T2 (en) * 1990-12-27 2006-08-10 Seiko Epson Corp. PROGRESSIVE LENS
EP0578833A4 (en) * 1992-02-03 1994-06-29 Seiko Epson Corp Variable focus visual power correction apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3852116B2 (en) * 1995-11-24 2006-11-29 セイコーエプソン株式会社 Progressive multifocal lens and spectacle lens
WO2006018879A1 (en) * 2004-08-19 2006-02-23 Menicon Co., Ltd. Multifocus colored contact lens and method for manufacturing the same

Also Published As

Publication number Publication date
JPH0239769B2 (en) 1990-09-07

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