CN101534749A - 稳定的可调节人工晶状体 - Google Patents

稳定的可调节人工晶状体 Download PDF

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CN101534749A
CN101534749A CNA2007800334246A CN200780033424A CN101534749A CN 101534749 A CN101534749 A CN 101534749A CN A2007800334246 A CNA2007800334246 A CN A2007800334246A CN 200780033424 A CN200780033424 A CN 200780033424A CN 101534749 A CN101534749 A CN 101534749A
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intraocular lens
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J·斯图尔特·卡明
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C&C Vision International Ltd
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Abstract

一种可调节的人工晶状体，其中光学部是相对于延伸部的外侧末端可移动的。所述人工晶状体包括由柔性材料制成的光学部以及能够多次弯折而不破裂的襻。所述襻在邻近光学部处窄而在其外部末端较宽。所述襻在邻近光学部处具有宽且深的铰链以更好地允许铰链在一定程度上“拉伸”。

Description

稳定的可调节人工晶状体
背景技术
多年以来，人工晶状体的设计一直是具有单个光学部和附着至光学部以将晶状体置于人晶状体的空囊袋中央并固定于此的环。在20世纪80年代中期，引入了板式晶状体，其包括长10.5mm的具有6mm光学部的硅酮(silicone)晶状体。这些晶状体可以折叠，但是在囊袋内固定不稳，而且位于前囊和后囊之间的袋内。最初的可折叠晶状体全部是由硅酮制成的。在20世纪90年代中期，引入丙烯酸树脂材料作为晶状体的光学部。该丙烯酸树脂晶状体包括具有直边的双凸面光学部，在直边中插入有环以将晶状体定位在眼睛中央并将其固定在囊袋内。
最近，市场上出现了可调节的人工晶状体，其一般为改进的板状襻(plate haptic)晶状体。板状襻晶状体可以认为是具有两个或更多个附连至光学部的板状襻的人工晶状体。
柔性丙烯酸树脂在眼外科手术中已经变得非常普遍。在2003年，超过50％的已植入人工晶状体具有丙烯酸树脂光学部。还引入了水凝胶晶状体。丙烯酸树脂和水凝胶材料都能经受多次弯曲而不破裂。
通过反复弯曲沿眼轴移动来起作用的可调节晶状体的出现在一定程度上限制了可用来制成晶状体的材料。由于硅酮是柔性的，并且可以弯曲约数百万次而不表现出任何损坏，因此它是理想的材料。此外，可以穿过作为晶状体设计一部分的光学部附近的板设置槽或铰链来促进光学部相对于襻外端的移动。另一方面，如果反复弯曲，则丙烯酸树脂材料会破裂。
发明内容
根据本发明的一个优选实施方案，一种可调节晶状体包括具有柔性固体光学部的晶状体，所述柔性固体光学部附连有两个或更多个可以是能够多次弯曲而不破裂的板状襻的延伸部，优选地，它们的远端具有固定和中心定位的功能。跨越邻近光学部的延伸部设置有宽或窄的铰链或槽，以利于光学部相对于延伸部外侧末端的向前和向后移动。柔性铰链的宽基部允许铰链的基部随睫状肌的收缩和玻璃体腔压力的增加而拉伸，由此允许光学部相对于板状襻的外侧末端进行额外的向前移动。
因此，本发明的特征是提供一种改进形式的可调节人工晶状体。
附图说明
图1是本发明的一个优选实施方案的正视图。
图2是侧视图。
图3是铰链的详细视图。
根据本发明，光学部是可折叠的柔性硅酮、丙烯酸树脂或水凝胶材料，板状襻是将承受多次折叠而不损坏的可折叠材料例如硅酮。优选地，板状襻的末端基本上具有T形固定装置并铰接至光学部。
具体实施方式
现在参考附图，详细示出一个优选的实施方案，其包括由柔性固体光学部2(优选用硅制成)和任意适合形式的但优选为三角形板状襻的柔性延伸部4组成的人工晶状体1，该柔性延伸部4能够多次弯曲而不损坏并且由例如硅酮制成。光学部2和襻4优选为共平面，并且两个襻4从光学部2的对侧向远端延伸。在襻4的远端设置有固定和中心定位的指形物6。
晶状体11的典型长度是10.5～11.5mm，光学部2通常是4.5～5.0mm直径的光学部。指形物6优选为约5.0mm宽，并且包括在将晶状体放入任意植入腔(insertion cartridge)中时向远处延伸的四点固定环。末端8具有略微不同的构型，有助于为外科医生指示晶状体是正面朝上的并且铰链在合适的位置处。
重要的是，襻4具有三角形形状，在靠近光学部处较窄而在外侧末端处较宽。铰链10设置在襻4和光学部2的外周之间，并且尤其期望铰链具有宽的弹性基部10，以允许通过薄的铰链基部随玻璃体腔中压力增加而拉伸，从而使光学部2前移得更多，这允许光学部2比例如美国专利第6,387,126号中显示的现有设计进行更多的向前移动。典型的铰链宽度11为0.4～6.0mm，并优选具有如箭头12所指的0.1-0.8mm、优选0.5mm的纵向铰链基部宽度，以及如箭头14所指的0.06-0.4mm、优选0.12mm的厚度范围，如图3所示。较宽的铰链基部在一定程度上像弹性带一样拉伸，从而有助于光学部2的更大的向前移动。
铰链10在前侧，如图1所示在右侧上的环6的圆形末端8表明铰链在最上方。末端8是圆形的。较宽的环6使用于远距视觉的晶状体前穹最小化，并由此提供更好的远距视觉。
优选光学部和板状襻为硅酮，环6为聚酰亚胺。
光学部2的后部表面周围可以具有锐边，以减少术后细胞越过晶状体后囊的迁移，由此降低后囊混浊的发生率和YAG后囊切开术的必要性。
如本领域所公知的，将例如附图所示的人工晶状体1植入摘除天然晶状体后的人眼囊袋中。人工晶状体通过在人晶状体前囊袋中的通常为圆形切口并穿过角膜或巩膜中的小开口插入囊袋中。襻4的外侧末端或环6位于囊袋的结膜囊(cul-de-sac)中。襻的外侧末端或环非常靠近袋的结膜囊，并且在任意形式的环(例如6)的情况下，环偏离该构型。环的末端或球形突出物设置在环6的外侧末端部分上，用于通过与纤维化结合来提高囊袋或结膜囊中的稳固性，该纤维化在手术摘除前囊袋的中央部分之后在囊袋中生成。
环6的内侧末端可以由与襻4相同的材料整体形成，或者所述环可以为不同的材料，例如聚酰亚胺。如果所述环由不同的材料形成，则将所述环模制到襻4的终端部分中，以使环6的柔性材料可以因弹性而沿环的内部固定构件延伸。
因此，已经示出并描述了一种人工晶状体，该人工晶状体理想地包括硅酮光学部和硅酮板状襻、由可与板状襻不同的材料制成的环和每个环末端处的固定装置，该固定装置允许所述环沿人眼囊袋的前囊和后囊融合处(in the fusion)形成的通道移动，并且包括具有如橡胶带一样拉伸的宽基部的宽铰链。
对于本领域的技术人员而言，在考虑本说明书以及附图和权利要求之后，本发明的各种变化、修改、变更和其它应用用途会变得显而易见。不脱离本发明精神和范围的所有这些变化、修改、变更和其它应用用途意图被所附的权利要求所覆盖。

Claims (11)

1.一种可调节的人工晶状体，包括柔性固体光学部和附连的柔性延伸部，所述柔性延伸部包括板状襻，所述板状襻设计为使所述光学部可以相对于所述延伸部的外侧末端前后移动，并且可以采取一个位置以使所述光学部处于所述板状襻外侧末端的前面、与所述板状襻外侧末端处于同一平面内或处于所述板状襻外侧末端的后面，并且可以通过所述光学部相对于所述延伸部的所述外侧末端从后部朝虹膜向前移动到更向前的或共平面的位置来实现调节，并且其中所述襻在靠近所述光学部处相对窄而在远处较宽，并且所述人工晶状体包括靠近所述光学部的所述襻中的铰链。
2.根据权利要求1所述的人工晶状体，其中所述铰链是宽的。
3.根据权利要求1所述的人工晶状体，其中所述铰链是深的。
4.根据权利要求1所述的人工晶状体，其中所述铰链是宽且深的。
5.根据权利要求1所述的人工晶状体，其中一个或更多个固定装置位于所述延伸部的末端。
6.根据权利要求1所述的人工晶状体，其中所述光学部为硅酮。
7.根据权利要求1所述的人工晶状体，其中所述襻为硅酮。
8.根据权利要求1所述的人工晶状体，其中所述延伸部包括聚酰亚胺的环和固定装置。
9.根据权利要求5所述的人工晶状体，其中所述环在其近末端处具有不同形状的固定元件，以增强所述晶状体在所述囊袋内的中心定位性和固定性。
10.根据权利要求1所述的人工晶状体，其中所述光学部的尺寸为3.5到8mm。
11.根据权利要求1所述的人工晶状体，其中所述铰链在基部处是宽的，以允许所述基部随玻璃体腔压力的增加而拉伸。
CNA2007800334246A 2006-09-07 2007-09-07 稳定的可调节人工晶状体 Pending CN101534749A (zh)

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WO2011151839A3 (en) * 2010-05-31 2012-07-26 Ram Srikanth Mirlay Pupil centered fovea focused optics assembly for intraocular lens
CN113558819A (zh) * 2021-07-09 2021-10-29 北京工商大学 改善人工晶状体屈光能力的新型空间柔性运放襻结构

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