JPH08152582A - Colored contact lens and its production - Google Patents
Colored contact lens and its productionInfo
- Publication number
- JPH08152582A JPH08152582A JP29664894A JP29664894A JPH08152582A JP H08152582 A JPH08152582 A JP H08152582A JP 29664894 A JP29664894 A JP 29664894A JP 29664894 A JP29664894 A JP 29664894A JP H08152582 A JPH08152582 A JP H08152582A
- Authority
- JP
- Japan
- Prior art keywords
- white ink
- contact lens
- colored
- ink layer
- iris
- 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】本発明は着色コンタクトレンズ及
びその製造法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a colored contact lens and a method for manufacturing the same.
【０００２】さらに詳細には、着色模様の色落ち、脱落
等がなく、かつ、人の眼の虹彩本来の色を隠蔽し、他の
色を呈させることができる、着色コンタクトレンズ及び
その製造法に関する。More specifically, a colored contact lens and a method for producing the same, in which there is no color fading or loss of the colored pattern, and the original color of the iris of the human eye can be hidden and other colors can be exhibited. Regarding
【０００３】[0003]
【従来の技術】着色コンタクトレンズ（以下着色レン
ズ）には、人の眼の虹彩本来の色を強調するために用い
る、虹彩と同じ色の透明な着色レンズ、そして人の眼の
虹彩の色を隠蔽し虹彩本来の色とは異なる色を呈させる
ために用いる、虹彩部分に不透明な着色を施した着色レ
ンズの２つのパターンがある。2. Description of the Related Art Colored contact lenses (hereinafter referred to as colored lenses) include a transparent colored lens of the same color as the iris and a color of the iris of the human eye, which is used to enhance the original color of the iris of the human eye. There are two patterns of colored lenses with opaque coloring on the iris, which are used to conceal and present a color different from the original color of the iris.
【０００４】これらの着色レンズには、着色剤の色落
ち、脱落等がないこと、着色模様が明瞭であること及び
効率的に簡単に着色付与ができることなどが要求され、
さまざまな検討がなされている。These colored lenses are required to have no color fading or falling off of the colorant, have a clear colored pattern, and can be colored easily and efficiently.
Various studies have been made.
【０００５】例えば、特開平３−５４５１９号公報には
樹脂の溶液に不溶性の顔料等を分散させたものを注型用
型底面に印刷模様を施した後、注型用型内にモノマーを
入れて重合し、次いで得られたレンズブロックを加工し
て虹彩模様付き着色レンズを得る方法が開示されている
が、この方法ではレンズブロックを更に完成レンズ形状
に加工する後工程が必要であり、製造工程が複雑である
という問題があった。For example, Japanese Patent Laid-Open No. 3-54519 discloses that a solution of a resin in which an insoluble pigment or the like is dispersed is printed on the bottom surface of a casting mold, and then a monomer is put into the casting mold. A method for obtaining a colored lens with an iris pattern by processing the obtained lens block and then polymerizing it is disclosed, but this method requires a post-process to further process the lens block into a finished lens shape. There is a problem that the process is complicated.
【０００６】米国特許第３４７６４９９号にはヒドロゲ
ルレンズに不溶性物質を沈殿させて光を吸収させること
が提案されているが、常に所望の密度の沈殿を得ること
は容易でないことが判明している。US Pat. No. 3,476,499 proposes precipitating an insoluble material on a hydrogel lens to absorb light, but it has proven difficult to always obtain a desired density of precipitation.
【０００７】特願平５−１５６３４４号明細書では、着
色模様の色落ち、脱落を防止するために、レンズ基材と
化学反応する有機溶剤を着色剤と混合して着色する方法
が提案されている。この方法は色落ち、脱落等に関して
いは十分であるが、本来の眼の虹彩の色を隠蔽するため
には白色顔料を混濁剤として用いて着色剤を調製する必
要があり、常に同じ色調のインクを調製するには熟練し
た技術が必要であった。そのうえ、パッドプリンターに
よる着色付与工程では、同一色調単位で印刷しなければ
ならず、色調を変えて印刷する場合には、転写体の交換
等の準備があり、作業が煩雑になる場合があった。Japanese Patent Application No. 5-156344 proposes a method of coloring an organic solvent that chemically reacts with a lens substrate by mixing it with a colorant in order to prevent the color pattern from fading and falling off. There is. Although this method is sufficient for color fading and loss, it is necessary to prepare a colorant using a white pigment as a clouding agent in order to conceal the original iris color of the eye, and always use the same color tone. Skilled techniques were required to prepare the ink. Moreover, in the coloring process using the pad printer, it is necessary to print in the same color tone unit, and when printing with different color tones, there are preparations such as replacement of the transfer body, which may complicate the work. .
【０００８】[0008]
【発明が解決しようとする課題】本発明の目的は、眼の
虹彩の本来の色を隠蔽することができ、着色模様の色落
ち、脱落がなく、完成レンズに虹彩模様を印刷して直接
着色を施すため、レンズの後加工が不要であり、そのう
え調製したインクのロット毎による色調のバラツキが少
なく、効率的かつ簡単な操作で所望の色に着色できる着
色コンタクトレンズ及びその製造法を提供することにあ
る。The object of the present invention is to conceal the original color of the iris of the eye, to prevent the colored pattern from being discolored or dropped, and to directly color the iris pattern by printing on the finished lens. Therefore, there is no need for post-processing of the lens, there is little variation in the color tone of the prepared ink lots, and a colored contact lens that can be colored in a desired color with an efficient and simple operation and a method for producing the same are provided. Especially.
【０００９】[0009]
【課題を解決するための手段】本発明は基材コンタクト
レンズ表面に少なくとも白色顔料、２−ヒドロキシエチ
ルメタクリレイト及びヘキサメチレンジイソシアネイト
環状三量体を含有する白色インク液を塗被し硬化して形
成した白色インク層を有し、該白色インク層の領域であ
る虹彩部分を反応性染料で着色したことを特徴とする着
色コンタクトレンズである。According to the present invention, a white ink liquid containing at least a white pigment, 2-hydroxyethyl methacrylate and hexamethylene diisocyanate cyclic trimer is applied and cured on the surface of a base material contact lens. The colored contact lens is characterized in that it has a white ink layer formed as described above, and the iris portion that is the region of the white ink layer is colored with a reactive dye.
【００１０】また、本発明は基材コンタクトレンズ表面
の虹彩部分に、少なくとも白色顔料、２−ヒドロキシエ
チルメタクリレイト及びヘキサメチレンジイソシアネイ
ト環状三量体からなる白色インク液を塗被し硬化して白
色インク層を形成する第一工程、第一工程で調製した白
色インク層領域付き基材コンタクトレンズを、その虹彩
部分以外をマスクする治具内に配置して反応性染料液中
に浸漬し、白色インク層の領域である虹彩部分を着色す
る第二工程、以上の少なくとも２つの工程からなること
を特徴とする着色コンタクトレンズの製造法である。Further, according to the present invention, a white ink liquid comprising at least a white pigment, 2-hydroxyethyl methacrylate and hexamethylene diisocyanate cyclic trimer is applied and cured on the iris portion of the surface of the base contact lens. First step of forming a white ink layer, the base material contact lens with a white ink layer area prepared in the first step, is placed in a jig that masks other than the iris portion, and immersed in a reactive dye solution, A method for producing a colored contact lens, comprising a second step of coloring an iris portion which is a region of a white ink layer, and at least two steps described above.
【００１１】白色顔料としては、一般的に知られている
酸化チタン、炭酸カルシウム、硫酸バリウム、リン酸カ
ルシウム、タルク、アルミナ等の無機微粉末を用いるこ
とができるが、その優れた隠蔽力の効果から、特に酸化
チタンを用いることが好ましい。As the white pigment, generally known inorganic fine powders of titanium oxide, calcium carbonate, barium sulfate, calcium phosphate, talc, alumina and the like can be used. Due to their excellent hiding power, It is particularly preferable to use titanium oxide.
【００１２】白色インク層は虹彩模様状に形成すること
が好ましいが、目的に応じてレンズの所望する部分に均
一層を形成することもできるし、また義眼等を目的とし
て瞳孔部に白色層を形成することもできる。The white ink layer is preferably formed in an iris pattern, but a uniform layer can be formed in a desired portion of the lens according to the purpose, and a white layer is formed in the pupil for the purpose of artificial eyes and the like. It can also be formed.
【００１３】コンタクトレンズの材質としては、ポリヒ
ドロキシエチルメタクリレイト（Ｐ−ＨＥＭＡ）系の含
水性ソフトコンタクトレンズが好ましいが、グリシジル
メタクリレイト系ポリマーやビニルピロリドン系ポリマ
ーあるいはこれらの共重合系に架橋剤としてエチレング
リコールジメタクリレイトに代表されるアルキレングリ
コールジメタクリレイト等を含むポリマー系にも適用す
るすることができる。As a material for the contact lens, a polyhydroxyethylmethacrylate (P-HEMA) type water-containing soft contact lens is preferable, but a glycidylmethacrylate type polymer, a vinylpyrrolidone type polymer, or a copolymerization agent thereof is used as a crosslinking agent. It is also applicable to a polymer system containing alkylene glycol dimethacrylate represented by ethylene glycol dimethacrylate.
【００１４】反応性染料としては、生理的安全性の確認
されたものを使用することが好ましく、具体的には、リ
アクティブブラック５、リアクティブブルー２１、リア
クティブオレンジ７８、リアクティブイエロー１５、リ
アクティブブルーＮｏ．１９、リアクティブブルーＮ
ｏ．４、Ｃ．Ｉ．リアクティブレッド１１、Ｃ．Ｉ．リ
アクティブイエロー８６、Ｃ．Ｉ．リアクティブブルー
１６３、Ｃ．Ｉ．リアクティブブルー７７を単独あるい
は２種以上を組み合わせて使用することができる。As the reactive dye, it is preferable to use one which has been confirmed to be physiologically safe. Specifically, reactive black 5, reactive blue 21, reactive orange 78, reactive yellow 15, Reactive Blue No. 19, Reactive Blue N
o. 4, C.I. I. Reactive Red 11, C.I. I. Reactive Yellow 86, C.I. I. Reactive Blue 163, C.I. I. Reactive Blue 77 can be used alone or in combination of two or more kinds.
【００１５】白色インク液は、酸化チタン１０〜５０重
量部、ポリビニルピロリドン１５〜３０重量部、ヘキサ
メチレンジイソシアネイト環状三量体１０〜２０重量
部、２−ＨＥＭＡ６０〜８０重量部、重合開始剤０．２
〜０．４重量部を混合して調製することが好ましい。こ
の場合、特に酸化チタンの量が５０重量部より多いと白
色インク層の虹彩模様の印刷が不鮮明となり、またレン
ズ表面に不必要の凹凸を付与することになり好ましくな
い。また、１０重量部未満であると白色インク層の虹彩
模様の印刷が不十分となり、隠蔽力が低下し目的とする
色調及び均一な虹彩模様が得られず好ましくない。The white ink liquid comprises 10 to 50 parts by weight of titanium oxide, 15 to 30 parts by weight of polyvinylpyrrolidone, 10 to 20 parts by weight of hexamethylene diisocyanate cyclic trimer, 60 to 80 parts by weight of 2-HEMA, and a polymerization initiator. 0.2
It is preferable to prepare a mixture of ˜0.4 parts by weight. In this case, in particular, when the amount of titanium oxide is more than 50 parts by weight, the iris pattern printing on the white ink layer becomes unclear, and unnecessary unevenness is imparted to the lens surface, which is not preferable. On the other hand, if the amount is less than 10 parts by weight, the iris pattern of the white ink layer is not sufficiently printed, the hiding power is lowered, and the desired color tone and uniform iris pattern cannot be obtained, which is not preferable.
【００１６】[0016]
【実施例】以下、本発明を実施例により具体的に説明す
る。EXAMPLES The present invention will be specifically described below with reference to examples.
【００１７】（Ａ）白色インク液の調製 酸化チタン３０重量部とポリビニルピロリドン２０重量
部を乳鉢にて粉砕して混合した後に、ヘキサメチレンジ
イソシアネイト環状三量体（商品名デュラネート、ＴＰ
Ａ−１００、旭化成製）１５重量部、２−ＨＥＭＡ７０
重量部、アゾビスイソブチロニトリル（ＡＩＢＮ）０．
３重量部を加え均一に混練し、更にシンナー１５０重量
部を加えて白色インク液を得た。(A) Preparation of White Ink Liquid After 30 parts by weight of titanium oxide and 20 parts by weight of polyvinylpyrrolidone were crushed and mixed in a mortar, hexamethylene diisocyanate cyclic trimer (trade name: duranate, TP)
A-100, manufactured by Asahi Kasei) 15 parts by weight, 2-HEMA70
Parts by weight, azobisisobutyronitrile (AIBN) 0.
3 parts by weight was added and kneaded uniformly, and 150 parts by weight of thinner was further added to obtain a white ink liquid.
【００１８】（Ｂ）白色インク層の形成 乾燥状態のＰ−ＨＥＭＡ系含水性ソフトコンタクトレン
ズ完成品をフロント面を上にして印刷用治具に固定し
た。次に、虹彩模様付きのステンレス製版の虹彩模様部
分に白色インク液を塗被した。次に、パッド印刷用プリ
ンティングマシーンのシリコーン製転写体を用いて、レ
ンズに虹彩模様を印刷した。印刷後直ちに８０℃のオー
ブンに入れて１６時間重合処理をして白色インク層付き
のレンズを得た。この後にこのレンズを生理的食塩水で
膨潤させた。(B) Formation of White Ink Layer A dried P-HEMA water-containing soft contact lens finished product was fixed to a printing jig with the front surface facing upward. Next, the white ink liquid was applied to the iris pattern portion of the stainless steel plate with the iris pattern. Next, an iris pattern was printed on the lens using a silicone transfer body of a printing machine for pad printing. Immediately after printing, the product was placed in an oven at 80 ° C. and polymerized for 16 hours to obtain a lens with a white ink layer. After this, the lens was swollen with saline.
【００１９】（Ｃ）白色インク層付きのレンズの着色方
法 白色インク層を形成する虹彩部分のみを残してマスクす
るために、前記（Ｂ）で調製した膨潤状態のレンズを専
用の治具に配置する。(C) Method for coloring lens with white ink layer In order to mask only the iris portion forming the white ink layer, the swollen lens prepared in (B) above is placed on a dedicated jig. To do.
【００２０】色調としては、各色を単独あるいは２種以
上を組み合わせて使用するが、以下では基本的な色調と
しての茶色系、青色系及び緑色系について説明する。As the color tones, each color may be used alone or in combination of two or more kinds, and in the following, basic colors such as brownish, blueish and greenish will be described.
【００２１】（茶色系）Ｃ．Ｉ．リアクティブレッド１
１を２．４ｇ、Ｃ．Ｉ．リアクティブイエロー８６を
２．４ｇ、リアクティブブラック５を１０ｇ、この３種
類を８００ｍｌの精製水に溶解して、助剤としての硫酸
ナトリウム８ｇを加えて茶色の着色染料液を調製する。
該着色染料液に、専用の治具でマスクした膨潤レンズを
治具ごと浸漬し、５５℃にて約６０分間保持し染色す
る。染色処理終了後着色染料液から取り出して治具ごと
流水にて洗浄しレンズを治具から取り出して、一般的な
反応性染料の定着方法として知られているアルカリ溶液
処理を施して虹彩部が茶色の着色レンズを得た。(Brown) C.I. I. Reactive red 1
2.4 g of C.I. I. 2.4 g of Reactive Yellow 86, 10 g of Reactive Black 5 and these 3 types are dissolved in 800 ml of purified water, and 8 g of sodium sulfate as an auxiliary agent is added to prepare a brown colored dye solution.
The swelling lens masked with a dedicated jig is immersed in the coloring dye solution together with the jig, and the dye is held at 55 ° C. for about 60 minutes. After the dyeing process is completed, remove the dye from the dye solution, wash the jig with running water, remove the lens from the jig, and subject it to an alkaline solution treatment known as a general reactive dye fixing method to make the iris part brown. A colored lens of was obtained.
【００２２】（青色系）同様に、Ｃ．Ｉ．リアクティブ
ブルー７７を１６ｇ、これを８００ｍｌの精製水に溶解
して、同様の操作で青色の着色染料液を調製する。該着
色染料液に、専用の治具でマスクしたレンズを治具ごと
浸漬し、５５℃にて約６０分間保持する。その後前記と
同様の処理をして虹彩部が青色の着色レンズを得た。(Blue system) Similarly, C.I. I. 16 g of Reactive Blue 77 and 800 ml of purified water are dissolved, and a blue coloring dye solution is prepared by the same operation. The lens masked with a dedicated jig is immersed in the colored dye solution together with the jig, and the lens is held at 55 ° C. for about 60 minutes. Then, the same treatment as described above was performed to obtain a colored lens whose iris portion was blue.
【００２３】（緑色系）同様に、Ｃ．Ｉ．リアクティブ
ブルー７７を１２．８ｇ、Ｃ．Ｉ．リアクティブイエロ
ー８６を３．２ｇ、この２種の染料を精製水８００ｍｌ
に溶解して、同様の操作で緑色の着色染料液を調製す
る。該着色染料液に、専用の治具でマスクしたレンズを
治具ごと浸漬し、５５℃にて約６０分間保持する。その
後前記と同様の処理をして虹彩部が緑色の着色レンズを
得た。(Green system) Similarly, C.I. I. 12.8 g of Reactive Blue 77, C.I. I. 3.2 g of Reactive Yellow 86, 800 ml of purified water from these two dyes
To prepare a green coloring dye solution. The lens masked with a dedicated jig is immersed in the colored dye solution together with the jig, and the lens is held at 55 ° C. for about 60 minutes. After that, the same treatment as described above was performed to obtain a colored lens whose iris portion was green.
【００２４】（Ｄ）評価 以上の３種類の着色レンズの虹彩模様及び隠蔽の程度
を、着色、洗浄後に肉眼及びルーペ（×２０倍）で観察
したが、良好であった。(D) Evaluation The iris patterns and the degree of hiding of the above three types of colored lenses were observed with the naked eye and a magnifying glass (× 20) after coloring and washing, and they were good.
【００２５】次に、着色模様の耐久性試験として、これ
らの着色レンズを生理的食塩水で６時間の煮沸処理をし
たが、色落ち、脱落等は認められなかった。Next, as a durability test of the colored pattern, these colored lenses were boiled in physiological saline for 6 hours, but no discoloration or discoloration was observed.
【００２６】さらに、前記耐久性試験後の着色レンズを
専用のスポンジ製洗浄パフに専用の洗浄剤を滴下して人
差指の腹でこすり洗い試験を行ったが、着色模様の色落
ち、脱落等は認められなかった。Further, the colored lens after the durability test was dropped on a dedicated sponge cleaning puff with a dedicated cleaning agent, and a rubbing test was conducted on the belly of the index finger. I was not able to admit.
【００２７】[0027]
【発明の効果】本発明によれば、 １．基材コンタクトレンズ表面の白色インク層がレンズ
基材と化学結合により強固に結合していて、該白色イン
ク層の領域を反応性染料で着色するために着色層の色落
ちや脱落がない。 ２．隠蔽力に優れた白色インク層を形成することによ
り、眼の本来の虹彩の色を所望の虹彩色に変えることが
できる。 ３．従来、混濁剤として使用されていた酸化チタンを染
料とは別に適用するため、調製ロット間のインク色調の
バラツキが小さく、安定した色調を得ることができる。
すなわち、各種色調は反応性染料のみを組み合わせるこ
とにより得られるので、色調及び濃度の微妙な調整が容
易である。 ４．基材コンタクトレンズは白色インク層を形成した状
態で保存することができ、必要に応じて、所望の色調に
簡単に着色することができるため、着色レンズの不要な
製品在庫を持つ必要がない。According to the present invention, 1. The white ink layer on the surface of the base material contact lens is firmly bonded to the lens base material by chemical bonding, and the region of the white ink layer is colored with the reactive dye, so that the colored layer does not fade or fall off. 2. By forming the white ink layer having excellent hiding power, the original iris color of the eye can be changed to a desired iris color. 3. Since titanium oxide, which has been conventionally used as a turbidity agent, is applied separately from the dye, the variation in ink color tone between preparation lots is small and a stable color tone can be obtained.
That is, since various color tones can be obtained by combining only the reactive dyes, it is easy to finely adjust the color tone and the density. 4. The base contact lens can be stored in a state where the white ink layer is formed, and can be easily colored to have a desired color tone if necessary, so that it is not necessary to have an unnecessary product inventory of the colored lens.
Claims (4)
白色顔料、２−ヒドロキシエチルメタクリレイト及びヘ
キサメチレンジイソシアネイト環状三量体を含有する白
色インク液を塗被し硬化して形成した白色インク層を有
し、該白色インク層の領域を反応性染料で着色したこと
を特徴とする着色コンタクトレンズ。1. A white ink layer formed by coating and curing a white ink liquid containing at least a white pigment, 2-hydroxyethyl methacrylate and hexamethylene diisocyanate cyclic trimer on the surface of a base contact lens. A colored contact lens, characterized in that the region of the white ink layer is colored with a reactive dye.
域である虹彩部分に、虹彩模様状にまたは全面に均一に
形成されている請求項１記載の着色コンタクトレンズ。2. The colored contact lens according to claim 1, wherein the white ink layer is uniformly formed in an iris pattern or on an entire surface in an iris portion which is a region of the white ink layer.
１記載の着色コンタクトレンズ。3. The colored contact lens according to claim 1, wherein the white pigment is titanium oxide.
に、少なくとも白色顔料、２−ヒドロキシエチルメタク
リレイト及びヘキサメチレンジイソシアネイト環状三量
体からなる白色インク液を塗被し硬化して白色インク層
を形成する第一工程、 第一工程で調製した白色インク層領域付き基材コンタク
トレンズを、その虹彩部分以外をマスクする治具内に配
置して反応性染料液中に浸漬し、白色インク層の領域で
ある虹彩部分を着色する第二工程、以上の少なくとも２
つの工程からなることを特徴とする着色コンタクトレン
ズの製造法。4. A white ink layer obtained by applying a white ink liquid comprising at least a white pigment, 2-hydroxyethyl methacrylate and hexamethylene diisocyanate cyclic trimer to the iris portion of the surface of the base contact lens and curing the same. The first step of forming, the base material contact lens with the white ink layer area prepared in the first step is placed in a jig that masks parts other than the iris part and immersed in a reactive dye solution to form a white ink layer. The second step of coloring the iris part which is the region of
A method for manufacturing a colored contact lens, which comprises two steps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29664894A JP3646997B2 (en) | 1994-11-30 | 1994-11-30 | Colored contact lens and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29664894A JP3646997B2 (en) | 1994-11-30 | 1994-11-30 | Colored contact lens and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08152582A true JPH08152582A (en) | 1996-06-11 |
| JP3646997B2 JP3646997B2 (en) | 2005-05-11 |
Family
ID=17836267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29664894A Expired - Lifetime JP3646997B2 (en) | 1994-11-30 | 1994-11-30 | Colored contact lens and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3646997B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6447118B1 (en) | 1999-05-21 | 2002-09-10 | Menicon Co., Ltd. | Optical water-absorptive gel and ophthalmic material using the same |
| WO2009017060A1 (en) | 2007-07-27 | 2009-02-05 | Menicon Co., Ltd. | Optical material and ophthalmic lens made of the same |
| WO2011127079A1 (en) * | 2010-04-09 | 2011-10-13 | Chu Milton W | Intraocular lenses with high contrast haptics, materials, and methods |
| US9063350B1 (en) * | 2012-02-28 | 2015-06-23 | Robert Cameron | Colored contact lens |
| KR101967128B1 (en) * | 2019-01-24 | 2019-04-08 | 박근창 | Color contact lens |
| CN112521545A (en) * | 2020-12-29 | 2021-03-19 | 甘肃康视达科技集团有限公司 | Ink intermediate for colored contact lenses and preparation method thereof |
-
1994
- 1994-11-30 JP JP29664894A patent/JP3646997B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6447118B1 (en) | 1999-05-21 | 2002-09-10 | Menicon Co., Ltd. | Optical water-absorptive gel and ophthalmic material using the same |
| WO2009017060A1 (en) | 2007-07-27 | 2009-02-05 | Menicon Co., Ltd. | Optical material and ophthalmic lens made of the same |
| WO2011127079A1 (en) * | 2010-04-09 | 2011-10-13 | Chu Milton W | Intraocular lenses with high contrast haptics, materials, and methods |
| US9063350B1 (en) * | 2012-02-28 | 2015-06-23 | Robert Cameron | Colored contact lens |
| KR101967128B1 (en) * | 2019-01-24 | 2019-04-08 | 박근창 | Color contact lens |
| WO2020153529A1 (en) * | 2019-01-24 | 2020-07-30 | 박근창 | Colored contact lens |
| CN112521545A (en) * | 2020-12-29 | 2021-03-19 | 甘肃康视达科技集团有限公司 | Ink intermediate for colored contact lenses and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3646997B2 (en) | 2005-05-11 |
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