JP2015503977A - 後眼房型眼内レンズ - Google Patents
後眼房型眼内レンズ Download PDFInfo
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Abstract
Description
本願で用いられる用語「光学部分」とは、眼内レンズの光学部と光学部辺縁からなる。
移植された眼内レンズの嚢内における安定性を高め、後嚢混濁の発症率を低下させることは、本発明にかかる眼内レンズの光学部の面形状を設計するにあたって最初に考慮すべき事項である。
表2に、異なる材料で作製された本発明の後眼房型眼内レンズにおける光学部の面形状設計の実施例を列挙する。
従来技術の眼内レンズ製品が備える高次収差(球面収差及びコマ収差を含む)を除去又は低減させて結像品質を高めるために、本発明の一実施形態における後方凸が顕著な後眼房型眼内レンズにおける光学部の後面又は光学部の前面は高次非球面設計を採用しており、一般的な単一Q値の非球面設計は用いていない(単一Q値の非球面設計は球面収差の補償しかできない)。
乱視を伴う白内障患者の水晶体を摘出した後、屈折力を矯正するとともに角膜乱視を矯正することで更に視覚の質を高めるために、本発明の後方凸が顕著な後眼房型眼内レンズにおける光学部の前面又は光学部の後面に、複合トーリック面設計を採用してもよい。
2 光学部分
3 光学部
4 光学部辺縁
5 ハプティック
6 光学部の前面
7 光学部の後面
8 眼内レンズの光学部分における縦方向の中心平面
8’−8’ 眼内レンズの光学部分における縦方向の中心線
9 後嚢(膜)
10 隙間
11 角膜
12 嚢
13 折り畳み隙間
14 尖った折り曲げ部
15 連接部
15’−15’ 連接部の縦方向の中心線
16 ハプティック基部
16’−16’ ハプティック基部の縦方向の中心線
18 トーリック型眼内レンズ軸の軸方向マーク
A 眼内レンズの光学部分における縦方向の中心線と連接部における縦方向の中心線との交点
α ハプティック形成角
β 連接部傾斜角
D−D’ 眼軸方向
E−E’ 角膜の最大屈折力方向
d−d’ 複合トーリック面の回転軸線
O 光学部(前又は後)面の頂点
R 回転半径
r 曲率半径
Claims (20)
- 光学部及び光学部辺縁からなる光学部分と、前記光学部分に連なる少なくとも2つのハプティックを含む後眼房型眼内レンズにおいて、
前記光学部の後面は凸型であり、且つ、その基礎球面の曲率半径は6.6mm〜80.0mmの範囲内であることを特徴とする後眼房型眼内レンズ。 - 前記光学部の前面は凸型であり、且つ、その基礎球面の曲率半径は7.1mm〜84.0mmの範囲内であることを特徴とする請求項1に記載の後眼房型眼内レンズ。
- 前記光学部の後面における基礎球面の曲率半径は、前記光学部の前面の曲率半径より小さいことを特徴とする請求項1又は2に記載の後眼房型眼内レンズ。
- 前記光学部の後面における基礎球面の曲率半径は、前記光学部の前面の曲率半径の17.8%〜60.0%であることを特徴とする請求項3に記載の後眼房型眼内レンズ。
- 前記光学部の後面における基礎球面の曲率半径は、前記光学部の前面の曲率半径の20.0%〜45.6%であることを特徴とする請求項4に記載の後眼房型眼内レンズ。
- 前記ハプティックのハプティック基部が、前記光学部分における前記光学部辺縁に直接連なっていることを特徴とする請求項3に記載の後眼房型眼内レンズ。
- 前記光学部辺縁は尖った折り曲げ部を更に含むことを特徴とする請求項6に記載の後眼房型眼内レンズ。
- 前記後眼房型眼内レンズは連接部を更に含み、前記ハプティックのハプティック基部が、前記連接部を介して前記光学部分の前記光学部辺縁に連なっていることを特徴とする請求項3に記載の後眼房型眼内レンズ。
- 前記光学部辺縁は尖った折り曲げ部を更に含むことを特徴とする請求項8に記載の後眼房型眼内レンズ。
- 前記連接部の縦方向の中心線は、前記光学部分の縦方向の中心線に対し、10°〜45°の範囲の連接部傾斜角をなすことを特徴とする請求項8又は9に記載の後眼房型眼内レンズ。
- 前記ハプティック基部の縦方向の中心線は、前記光学部分の縦方向の中心線に対し、0°〜7°の範囲のハプティック形成角をなすことを特徴とする請求項6から10のいずれか一項に記載の後眼房型眼内レンズ。
- 前記光学部における後面の面形状は、球面、非球面、複合トーリック面、複数領域で屈折するよう設計された複数焦点面、及び複数領域で回折するよう設計された複数焦点面を含む面形状のいずれかであることを特徴とする請求項1から11のいずれか一項に記載の後眼房型眼内レンズ。
- 前記光学部における前面の面形状は、球面、非球面、複合トーリック面、複数領域で屈折するよう設計された複数焦点面、及び複数領域で回折するよう設計された複数焦点面を含む面形状のいずれかであることを特徴とする請求項1から11のいずれか一項に記載の後眼房型眼内レンズ。
- 前記後眼房型眼内レンズは、シリコーン、ヒドロゲル、疎水性アクリル酸エステル、又はポリメタクリル酸メチルから作製されることを特徴とする前記請求項のいずれか一項に記載の後眼房型眼内レンズ。
- 前記後眼房型眼内レンズの作製材料の屈折率は1.45〜1.56の間であることを特徴とする請求項14に記載の後眼房型眼内レンズ。
- 前記後眼房型眼内レンズは屈折率1.48の疎水性アクリル酸エステルからなり、前記光学部の後面における基礎球面の曲率半径は7.5mm〜55.0mmの範囲内であり、前記光学部の前面の曲率半径は8.0mm〜74.0mmの範囲内であることを特徴とする請求項14又は15に記載の後眼房型眼内レンズ。
- 前記光学部の後面における基礎球面の曲率半径は8.1mm〜19.5mmの範囲内であることを特徴とする請求項16に記載の後眼房型眼内レンズ。
- 前記光学部の後面における基礎球面の曲率半径は11.1mmであることを特徴とする請求項17に記載の後眼房型眼内レンズ。
- 前記後眼房型眼内レンズは1ピース式眼内レンズであることを特徴とする請求項1から18のいずれか一項に記載の後眼房型眼内レンズ。
- 前記後眼房型眼内レンズは3ピース式眼内レンズであることを特徴とする請求項1から18のいずれか一項に記載の後眼房型眼内レンズ。
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CN201210017070.9A CN103211665B (zh) | 2012-01-19 | 2012-01-19 | 后房型人工晶体 |
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CN201210017055.4 | 2012-01-19 | ||
CN201210017055.4A CN103211664B (zh) | 2012-01-19 | 2012-01-19 | 后房型人工晶体 |
CN201210335578.3A CN103655001A (zh) | 2012-09-12 | 2012-09-12 | 一种散光矫正型人工晶体 |
CN201210335578.3 | 2012-09-12 | ||
PCT/CN2013/000057 WO2013107288A1 (zh) | 2012-01-19 | 2013-01-18 | 后房型人工晶体 |
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