CN1256430A - 复曲面隐眼镜 - Google Patents

复曲面隐眼镜 Download PDF

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Publication number
CN1256430A
CN1256430A CN99126717A CN99126717A CN1256430A CN 1256430 A CN1256430 A CN 1256430A CN 99126717 A CN99126717 A CN 99126717A CN 99126717 A CN99126717 A CN 99126717A CN 1256430 A CN1256430 A CN 1256430A
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Prior art keywords
millimeters
contact lenses
contact lens
toric
district
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CN99126717A
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T·A·克鲁特布克
S·B·希克森－库尔兰
S·W·尼德勒
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Johnson and Johnson Vision Care Inc
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Johnson and Johnson Vision Products Inc
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Publication of CN1256430A publication Critical patent/CN1256430A/zh
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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)

Abstract

本发明提出一种复曲面隐形眼镜,其不论具有一正球面光焦度或负球面光焦度,均可良好地配戴且在眼球上良好地定向。

Description

复曲面隐眼镜
本发明涉及一种复曲面隐形眼镜。明确地说，本发明涉及一种复曲面软式隐形眼镜。
使用隐形眼镜矫正视力已广为人知。明确地说，现今利用复曲面隐形眼镜矫正配戴者的散光。然而，复曲面隐形眼镜的缺点在于其依赖眼脸边缘与隐形眼镜厚度差之交互作用以将隐形眼镜定位在配戴者眼睛上的正确位置。由于隐形眼镜在其光学区内的厚度增加，使得隐形眼镜在眼脸边缘抬起较多而导致隐形眼镜定位机构所在之外围区域处压力降低。因此，此压力降导致定位特性减弱。此问题在号称之正光焦度复曲面稳形眼镜(plus-powered toric lenses)特别严重。因此存在对改良复曲面隐形眼镜的需求。
图1为本发明隐形眼镜的平面图。
图2为图1隐形眼镜在180°轴线处一部份镜边之剖面放大图。
本发明发现具备改良设计之复曲面隐形眼镜可籍由选择某些透镜参数而获得。本发明隐形眼镜之优点在于不论其具有一正球面光焦度或负球面光焦度，均可在眼球上维持良好的定向。
在一实施例中，本发明提出一种复曲面隐形眼镜，其本质上包含一凸形外表面和一凹形内表面，该凸面具有一或多个下列特质：约2.0毫米至约6.0毫米之弄薄区(slab-off)间隙，约0.1至约0.2毫米之边缘厚度差，约7至约10毫米之弄薄区中心直径，及约0.50至约2.5毫米之斜边宽度。
在另一实施例中，本发明提出一种正视曲面隐形眼镜，其本质上包含一凸形外表面和一凹形内表面，该凸面具有一或多个下列特质：约3.50毫米至约4.50毫米之弄薄区间隙，约0.18至约0.19毫米(边缘厚度差，约8.00至约8.50毫米之弄薄区中心直径，及约1.40至约1.60毫米之斜边宽度。
在另一实施例中，本发明提出一种负复曲面隐形眼镜，其本质上包含一凸形外表面和一凹形内表面。该凸面具有一或多个下列特质：约3.50毫米至约4.50毫米之弄薄区间隙，约0.16至约0.175毫米之边缘厚度差，约9.00至约9.50毫米之弄薄区中心直径，及约0.85至约1.15毫米之斜边宽度。
文中“正复曲面隐形眼镜(plus toric lens)”意指具备复曲面或柱面矫正及正球面光焦度之隐形眼镜。文中“负复曲面隐形眼镜(minustoric lens)”意指具备柱面矫正及负表面光焦度之隐形眼镜。文中“弄簿区(slab-off)”意指隐形眼镜中央光学区的外围处之渐薄区。文中“弄薄区间隙(slab-off gap)”意指隐形眼镜在弄薄区边缘间之区域。文中“边缘厚度差(edge thickness differential)”意指非弄薄区内之隐形眼镜外围最厚部分与弄薄区之外围最薄部分之厚度差。文中“弄薄区中心直径(slab-off central diameter)”意指弄薄区底部边缘中，心点间之垂直距离。文中“斜边(bevel)”意指在隐形眼镜外围之倾斜区。
适用于本发明之隐形眼镜可为以任意适当材料制成之有柱面矫正效果之硬式或软式隐形眼镜，其中以软式为较佳。本发明之隐形眼镜可在复曲面矫正效果之外在其表面上加入多种矫正用光学特性。举例来说，该隐形眼镜可具有球面矫正、非球面矫正、双焦点矫正、多焦点矫正、或是棱镜矫正等-或多种矫正效果。此等矫正效果可似在凸面或凹面或二者之上。
现参照图1，图中显示本发明之复曲面隐形眼镜10。隐形眼镜10有凸面11和凹面(未示出)，该凹面架在配戴者角膜上。凸面11具有中央光学区12。中央光学区12可为符合配戴者处方之任意期望形状，其非限制性包括球面、球面多焦点及非球面等。一非光学双凸区13围绕著中央光学区12。该凹面的光学区为以校正配戴者散光之一复曲面轴为中心之一复曲面或柱面。
弄薄区15和16于图中显示在隐形眼镜10的外围。该等弄薄区间之弄薄区间隙17为4.50毫米。隐形眼镜10的斜边宽度14为1.00毫米。个别弄薄区15和16的中心点19和21间之弄薄区中心直径18为9.25毫米。
图2为隐形眼镜10一部份边缘的放大剖面图。实线20为180°轴线处之隐形眼镜边缘。虚线22为在90°轴线处之边缘的轮廓。图2绘出隐形眼镜厚度23在水平和垂直子午线间之差异。该厚度差可定位该隐形眼镜且可因修改隐形眼镜几何形状而使隐形眼镜之转动、移动和安定等特性最佳化。
本发明之隐形眼镜可籍由任意常规隐形眼镜制造方法制成。举例来说，隐形眼镜设计可切削成形在金属块上，再用该金属块生产用来制造隐形眼镜凹面和凸面之塑胶模具嵌魂·将一适当液体树脂五砍在二模具嵌块间，对该等嵌块加压，然後使树脂熟化。另一种方式，本发明之隐形眼镜可在车床上切削隐形眼镜制成。

Claims (6)

1.一种复曲面隐形眼镜，其包含一凸形外表面和一凹形内表面，该凸面具有一或多个下列特质：约2.0毫米至约6.0毫米之弄薄区(slab-off)间隙，约0.1至约0.2毫米之边缘厚度差，约7至约10毫米之弄薄区中心直径，及约0.50至约2.5毫米之斜边宽度。
2.如权利要求1所述的隐形眼镜，其中该隐形眼镜为软式隐形眼镜。
3.一种正复曲面隐形眼镜，其包含一凸形外表面和一凹形内表面，该凸面具有一或多个下列特质：约3.50毫米至约4.50毫米之弄薄区间隙，约0.18至约0.19毫米之边缘厚度差，约8.00至约8.50毫米之弄簿区中心直径，及约1.40至约1.60毫米之斜边宽度。
4.如权利要求3所述的隐形眼镜，其中该隐形眼镜为软式隐形眼镜。
5.一种负复曲面隐形眼镜，其己含一凸形外表面和一凹形内表面，该凸面具有一或多个下列特质：约3.50毫米至约4.50毫米之弄薄区间隙，约0.16至约0.175毫米之边缘厚度差，约9.00至约9.50毫米之弄薄区中心直径，及约0.85至约1.15毫米之斜边宽度。
6.如权利要求5所述的隐形眼镜，其中该隐形眼镜为软式隐形眼镜。
CN99126717A 1998-12-09 1999-12-09 复曲面隐眼镜 Pending CN1256430A (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/208,516 1998-12-09
US09/208,516 US6176578B1 (en) 1998-12-09 1998-12-09 Toric contact lenses

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CN1256430A true CN1256430A (zh) 2000-06-14

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US (1) US6176578B1 (zh)
EP (1) EP1008890A1 (zh)
JP (1) JP2000199874A (zh)
KR (1) KR20000047897A (zh)
CN (1) CN1256430A (zh)
AR (1) AR021573A1 (zh)
AU (1) AU758697B2 (zh)
BR (1) BR9905809A (zh)
CA (1) CA2291833A1 (zh)
SG (1) SG83755A1 (zh)
TW (1) TW490024U (zh)

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CN102428403A (zh) * 2009-04-22 2012-04-25 Crt技术股份有限公司 巩膜型隐形眼镜及其制作、使用方法
CN102483526A (zh) * 2009-06-25 2012-05-30 庄臣及庄臣视力保护公司 近视控制镜片的设计

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CN102428403B (zh) * 2009-04-22 2014-06-18 Crt技术股份有限公司 巩膜型隐形眼镜及其制作、使用方法
CN102483526A (zh) * 2009-06-25 2012-05-30 庄臣及庄臣视力保护公司 近视控制镜片的设计
CN102483526B (zh) * 2009-06-25 2013-11-13 庄臣及庄臣视力保护公司 近视控制镜片的设计

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BR9905809A (pt) 2000-08-29
CA2291833A1 (en) 2000-06-09
AR021573A1 (es) 2002-07-24
AU6436499A (en) 2000-06-15
EP1008890A1 (en) 2000-06-14
TW490024U (en) 2002-06-01
AU758697B2 (en) 2003-03-27
KR20000047897A (ko) 2000-07-25
SG83755A1 (en) 2001-10-16
JP2000199874A (ja) 2000-07-18
US6176578B1 (en) 2001-01-23

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