CN1261162A - 具有固定的周边几何形状的隐形镜片 - Google Patents

具有固定的周边几何形状的隐形镜片 Download PDF

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Publication number
CN1261162A
CN1261162A CN99126961A CN99126961A CN1261162A CN 1261162 A CN1261162 A CN 1261162A CN 99126961 A CN99126961 A CN 99126961A CN 99126961 A CN99126961 A CN 99126961A CN 1261162 A CN1261162 A CN 1261162A
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thin slice
contact lens
center diameter
eyeglass
lens
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T·A·克鲁特布克
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Johnson and Johnson Vision Care Inc
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Johnson and Johnson Vision Products Inc
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    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/04—Contact lenses for the eyes
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/04—Contact lenses for the eyes
    • G02C7/048—Means for stabilising the orientation of lenses in the eye

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

Abstract

本发明提供隐形镜片。具体地说,本发明涉及其中光学区曲率改变但镜片外周的几何形状是固定的隐形镜片。

Description

具有固定的周边几何形状的隐形镜片
本发明涉及隐形镜片。具体地说，本发明涉及镜片外周的几何形状是固定的隐形镜片。
使用隐形镜片来矫正视敏度是众所周知的。隐形镜片的前部或凸表面有一具有矫正配戴眼镜者视敏度的曲率的光学区。因此，所述光学区的曲率将随着配戴者的处方的改变而改变。这种光学区曲率的改变伴随着镜片质量及其分布的改变，以及伴随着环绕光学区的镜片区域，或镜片外周的几何形状的改变。
光学区和镜片外周几何形状的变化是有问题的，其问题在于此种变化引起镜片配合的改变，因而当配戴者由一种处方变为另一种处方时，会引起镜片效能的改变。在镜片处方需要复杂的机械特征(例如复曲面透镜或具有柱面光焦度的透镜)的情况下，当镜片处方随时间变化时，在配合上会经历更大的变化。由此，存在着一种对于能克服这种缺点的隐形镜片设计的需求。
本发明发现，通过提供具有固定的外周几何形状的镜片，可使配戴者在处方改变时，获得具有更一致的配合及效能的隐形镜片。“固定的外周几何形状”意指，即使光学区曲率改变，外周区几何形状仍保持恒定。对于本发明的目的而言，镜片的外周区为环绕隐形镜片光学区的区域。于现有技术的镜片比较，本发明的镜片显示出效能和配合上的可预测性。
在一个实施方案中，本发明提供一种制造隐形镜片的方法，其基本包括：a)提供隐形镜片的外周区几何形状，包括约4.50mm的薄片区(slab-off)间隙，约0.170的边缘厚度差，约8.00mm或约9.50mm的薄片区中心直径，及约1.00-约1.50mm的斜面宽度；及b)接着提供隐形镜片的两个或多个光学区设计，其中外周区设计基本维持恒定。
在另一个实施方案中，本发明提供一种正复曲面隐形镜片，其包括一凸形外表面和一凹形内表面，该凸面具有一约4.50mm的薄片区间隙，约0.170的边缘厚度差，约8.00mm的薄片区中心直径，及约1.00-约1.50mm的斜面宽度。
在又一个实施方案中，本发明提供一种负复曲面隐形镜片，其包括一凸形外表面和一凹形内表面，该凸面具有一约4.50mm的薄片区间隙，约0.170的边缘厚度差，约9.50mm的薄片区中心直径，及约1.00-约1.50mm的斜面宽度。
“正复曲面镜片”意指具有复曲面或柱面矫正及正球面光焦度的隐形镜片。“负复曲面镜片”意指具有柱面矫正及负球面光焦度的隐形镜片。“薄片区”意指镜片外周至中心光学区的渐薄区。“薄片区间隙”意指位于薄片区边缘之间的镜片区域。“边缘厚度差”意指非薄片区的镜片外缘最厚部分和薄片区外缘最薄部分的厚度差。“薄片区中心直径”意指薄片区底部边缘中心点之间的垂直距离。“斜面”意指镜片外周的倾斜区域。
本发明发现，尽管光学区设计改变，即曲率和/或直径的改变仅在隐形镜片质量体积上产生小的变化，但在镜片外周区为适应光学区曲率改变所作设计的改变，可引起外周体积的显著变化。当配戴者的处方改变时，该体积的改变可能使镜片的配合更加困难。另外，体积的改变可能对配戴者的镜片效能产生负面影响。
在本发明的方法中，所述镜片的外周区几何形状是首先被设计的且不会随着光学区设计的改变而改变。特别是，外周区几何形状被设计为凸面具有一约4.50mm的薄片区间隙，约0.170的边缘厚度差，约8.00mm或约9.50mm的薄片区中心直径，及约1.00-约1.50mm的斜面宽度。本发明发现，使用此种外周区设计，可允许光学区曲率改变而不会改变外周区几何形状。如此，可获得所述镜片随处方变化的一致的配合和效能。
在镜片的外周几何形状的设计完成后，通过计算镜片的中心厚度、光学区曲率和直径，可提供为两个或多个隐形镜片所需的光学区设计范围。光学区设计可通过任何已知的方法进行。任选除了光学区和外周区之外，可提供一过渡区，该过渡区对于确保光学区与镜片外周区的相交处不会形成镜片内的阶梯或螺纹是有用的。
本发明所用的隐形镜片可以是硬的镜片，或是优选具有柱面矫正的软镜片，该镜片可由任何合适的材料制成。软的隐形镜片优选由水凝胶或含硅氧烷的水凝胶制成。此外，本发明的镜片可以具有任何结合于表面上的各种矫正光学特性。例如，镜片可以具有下列的一种或多种特性：球面的、非球面的、双焦点的、多焦点的、复曲面的或棱镜的矫正。这些矫正可以在凸面或凹面上，或是在凸面和凹面上。

Claims (5)

1.一种制造隐形镜片的方法，其包括下列步骤：
a)提供隐形镜片的外周区几何形状，该隐形镜片包括约4.50mm的薄片区(slab-off)间隙，约0.170的边缘厚度差，约8.00mm或约9.50mm的薄片区中心直径，及约1.00-约1.50mm的斜面宽度；及
b)接着提供隐形镜片的两个或多个光学区设计，其中外周区设计基本维持恒定。
2.权利要求1的方法，其中薄片区中心直径为8.00mm。
3.权利要求1的方法，其中薄片区中心直径为9.50mm。
4.一种正复曲面隐形镜片，其包括一凸形外表面和一凹形内表面，该凸面具有一约4.50mm的薄片区间隙，约0.170的边缘厚度差，约8.00mm的薄片区中心直径，及约1.00-约1.50mm的斜面宽度。
5.一种负复曲面隐形镜片，其包括一凸形外表面和一凹形内表面，该凸面具有一约4.50mm的薄片区间隙，约0.170的边缘厚度差，约9.50mm的薄片区中心直径，及约1.00-约1.50mm的斜面宽度。
CN99126961A 1998-12-21 1999-12-21 具有固定的周边几何形状的隐形镜片 Pending CN1261162A (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/217,363 US6183082B1 (en) 1998-12-21 1998-12-21 Contact lenses with constant peripheral geometry
US09/217,363 1998-12-21

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CN1261162A true CN1261162A (zh) 2000-07-26

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US (1) US6183082B1 (zh)
EP (1) EP1014156A1 (zh)
JP (1) JP4954358B2 (zh)
KR (1) KR100710602B1 (zh)
CN (1) CN1261162A (zh)
AR (1) AR021926A1 (zh)
AU (1) AU770882B2 (zh)
BR (1) BR9905914B1 (zh)
CA (1) CA2292353C (zh)
SG (1) SG83163A1 (zh)
TW (1) TW490574B (zh)

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KR100710602B1 (ko) 2007-04-24
US6183082B1 (en) 2001-02-06
JP4954358B2 (ja) 2012-06-13
AR021926A1 (es) 2002-09-04
JP2000206469A (ja) 2000-07-28
EP1014156A1 (en) 2000-06-28
SG83163A1 (en) 2001-09-18
TW490574B (en) 2002-06-11
AU770882B2 (en) 2004-03-04
BR9905914B1 (pt) 2010-08-24
BR9905914A (pt) 2000-10-24
CA2292353A1 (en) 2000-06-21
AU6527899A (en) 2000-06-22
KR20000047896A (ko) 2000-07-25
CA2292353C (en) 2008-03-11

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