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WO2005121874A1 - Lentille de contact dure a sillon pour larme - Google Patents

Lentille de contact dure a sillon pour larme Download PDF

Info

Publication number
WO2005121874A1
WO2005121874A1 PCT/KR2005/001687 KR2005001687W WO2005121874A1 WO 2005121874 A1 WO2005121874 A1 WO 2005121874A1 KR 2005001687 W KR2005001687 W KR 2005001687W WO 2005121874 A1 WO2005121874 A1 WO 2005121874A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens
tear
contact lens
cornea
storage portion
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.)
Ceased
Application number
PCT/KR2005/001687
Other languages
English (en)
Inventor
In Ho Choi
Sun Jae Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SIRIS-K Corp
SIRIS K Corp
Original Assignee
SIRIS-K Corp
SIRIS K Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SIRIS-K Corp, SIRIS K Corp filed Critical SIRIS-K Corp
Publication of WO2005121874A1 publication Critical patent/WO2005121874A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • G02C7/047—Contact lens fitting; Contact lenses for orthokeratology; Contact lenses for specially shaped corneae

Definitions

  • the present invention relates to a lens and, more particularly, to a hard contact lens, which comprises: an optical portion that corresponds to a part of the cornea covering the pupil of the eye and the iris adjacent to the pupil; a peripheral portion that corresponds to an edge portion of the cornea and the sclera; and a tear storage portion, i.e. tear groove, formed between the optical portion and the peripheral portion, whereby tears are stored in the tear storage portion, achieving a rigid gas permeable (RGP) lens, i.e. oxygen permeable lens, available for dry eyes suffering from excessive exposure of the cornea and limited oxygen supply due to tear shortage and rapid tear drying.
  • RGP rigid gas permeable
  • a conventional oxygen permeable hard contact lens provides only limited tear circulation between the cornea and the lens, inevitably causing a remarkable deterioration in oxygen supply by tears. For this reason, the conventional RGP lens is unsuitable for use by persons suffering from dry eyes.
  • the present invention provides a lens designed to more than double tear circulation to thereby maximize the instantaneous tear storage amount thereof.
  • Korean Patent Publication No. 2002-49710 (Application No. 10-2000-78953) discloses a tear circulating structure of an oxygen permeable hard contact lens which comprises: a recess formed at a center portion thereof; an inclined circulating portion formed along an outer circumference thereof; and holes formed between the recess and the inclined circulating portion and each having an inclined surface, thereby enabling effective circulation and discharge of tears.
  • the tear circulating structure of the conventional oxygen permeable hard contact lens has a problem in that it can be used exclusively by persons exhibiting a basal tear production. Thus, it is impossible to use the hard contact lens to persons suffering from dry eyes due to limited tear production and rapid tear drying.
  • the present invention has been made in view of the above problems, and it is an object of the present invention to provide an oxygen permeable hard contact lens with a tear groove wherein a tear storage portion is formed between an optical portion and a peripheral portion of the lens, whereby tears are stored in the tear storage portion, providing pleasant wearing to persons suffering from dry eyes due to limited tear production and rapid tear drying.
  • Fig. 1 is a front view of a tear groove hard contact lens in accordance with an embodiment of the present invention
  • Fig. 1 is a front view of a tear groove hard contact lens in accordance with an embodiment of the present invention.
  • Fig. 1 shows a front side of the contact lens disposed on the tip of a finger prior to being worn on the eye.
  • the lens 10 comprises an optical portion 20, a tear storage portion 30, a peripheral portion 40, and an edge portion 50. It should be understood that all of the portions 20 to 50 are integrally formed with one another although they are classified into the plurality of portions 20 to 50.
  • the optical portion 20 has a diameter of 5mm, and widths of the tear storage portion 30, peripheral portion 40, and edge portion 50 are 0.60mm, 1.25mm, and 0.55mm, respectively.
  • the diameter of the optical portion 20 and the widths of the tear storage portion 30, peripheral portion 40, and edge portion 50 are variable depending on different structures of wearer's eyes, it is preferable to maintain an approximately constant ratio therebetween.
  • Fig. 2 is a side sectional view of the tear groove hard contact lens in accordance with the embodiment of the present invention.
  • the optical portion 20 corresponds to a part of the cornea covering the pupil of the eye and the iris adjacent to the pupil, thereby serving to correct a visual acuity.
  • the optical portion 20 is variable in the index of refraction and shape depending on the visual acuity of the wearer and the presence of astigmatism, etc.
  • the tear storage portion 30 is recessed from a cornea contact surface of the lens 10 by a predetermined depth. A boundary region between the optical portion 20 and the tear storage portion 30 is slightly inclined to eliminate the risk of unpleasant wearing of the lens 10 due to impurities.
  • the peripheral portion 40 corresponds to a portion of the cornea outside of the iris of the eye, and is adapted to guide the lens 10 to an accurate position. Similarly, a boundary region between the tear storage portion 30 and the peripheral portion 40 is slightly inclined to eliminate the risk of unpleasant wearing of the lens 10 due to impurities.
  • the edge portion 50 corresponds to a boundary region between the iris and the sclera and a certain limited portion of the sclera.
  • the lens 10 of the present invention has a larger edge lift angle than that of the conventional RGP lens. This is effective to induce the generation of a greater amount of tears.
  • the edge portion 50 is designed to have an appropriate curvature to minimize unpleasant feeling upon wearing of the lens 10.
  • the tear storage portion 30 has a depth of 0.11mm.
  • the depth of the tear storage portion 30 is variable depending on the thickness, compression degree, material, etc. of the lens 10.
  • Fig. 3 is a side view showing the hard contact lens worn on the eye.
  • the human eye comprises a pupil 70, an iris 80, a not shown transparent cornea that covers the pupil 70 and the iris 80, and a sclera 90.
  • the eye further comprises a crystalline lens, a ciliary body, a vitreous body, a choroids, and a retina.
  • the lens 10 of the present invention covers the corner, which covers the pupil 70 and the iris 80, and the certain limited portion of the sclera 90.
  • the edge of the lens 10 is located at the juncture of the cornea and the sclera 90.
  • the tear storage portion 30 is formed at the surface of the lens 10 that comes into contact with the cornea.
  • tears are stored in the tear storage portion 30 to thereby serve as a lubricant between the cornea and the lens 10, preventing the eye from drying upon wearing of the lens 10.
  • a tear groove hard contact lens for use in a human eye, the contact lens being a rigid gas permeable (RGP) lens having a high oxygen permeability, comprising: an optical portion having an inner contact surface corresponding to a cornea of the eye; a tear storage portion formed adjacent to a circumference of the optical portion; a peripheral portion formed adjacent to an outer circumference of the tear storage portion; and an edge portion formed adjacent to an outer circumference of the peripheral portion.
  • RGP gas permeable
  • the lens may be made of silicon acrylate containing fluorine.
  • a diameter of the optical portion may be 4 to 6.5mm, and widths of the tear storage portion, peripheral portion, and edge portion may be 0.4 to 0.7mm, 1.0 to 1.5mm, and 0.5 to 0.65mm, respectively.
  • a depth of the tear storage portion may be 0.01 to 0.05mm.
  • a cross section of the optical portion may be part of an oval
  • a cross section of the tear storage portion may be part of a hyperbola
  • a cross section of the peripheral portion may be part of a parabola.
  • the present invention provides a hard contact lens which can gather the maximum amount of tears even from persons suffering from dry eyes due to a limited tear production, and store it between the cornea and the lens, thereby retarding the evaporation of tears and continuously keeping a tear layer.
  • the contact lens of the present invention can ensure pleasant wearing and safe use as well as sufficient oxygen supply.

Landscapes

  • 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

L'invention concerne une lentille comprenant une partie optique qui correspond à une partie de la cornée recouvrant la pupille de l'oeil et l'iris adjacent à la pupille, une partie périphérique qui correspond à une partie du bord de la cornée et de la sclérotique, et une partie de stockage de larmes formée entre la partie optique et la partie périphérique. La lentille est capable de recueillir une quantité importante de larmes chez des personnes souffrant de sécheresse des yeux provoquée par une production réduite de larmes et de la stocker entre la cornée et la lentille, ce qui permet de retarder l'évaporation des larmes et de maintenir en continu une couche de larmes. De ce fait, la lentille garantit une utilisation agréable et un usage sûr, ainsi qu'une alimentation en oxygène suffisante.
PCT/KR2005/001687 2004-06-08 2005-06-07 Lentille de contact dure a sillon pour larme Ceased WO2005121874A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2004-0041890 2004-06-08
KR10-2004-0041890A KR100485763B1 (ko) 2004-06-08 2004-06-08 렌즈

Publications (1)

Publication Number Publication Date
WO2005121874A1 true WO2005121874A1 (fr) 2005-12-22

Family

ID=35503224

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2005/001687 Ceased WO2005121874A1 (fr) 2004-06-08 2005-06-07 Lentille de contact dure a sillon pour larme

Country Status (2)

Country Link
KR (1) KR100485763B1 (fr)
WO (1) WO2005121874A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014192853A1 (fr) * 2013-05-30 2014-12-04 株式会社シード Dispositif annulaire
US9395557B2 (en) 2014-11-12 2016-07-19 Vance M. Thompson Partial corneal conjunctival contact lens
US9869883B2 (en) 2015-03-11 2018-01-16 Vance M. Thompson Tear shaping for refractive correction
CN110892313A (zh) * 2017-05-01 2020-03-17 普雷斯拜视力有限公司 动态泪液透镜
US10678067B2 (en) 2018-04-06 2020-06-09 Vance M. Thompson Tear shaping for refractive correction
WO2022034957A1 (fr) * 2020-08-11 2022-02-17 (주)메디오스 Lentille de contact souple
US11281023B2 (en) 2016-10-17 2022-03-22 Tearoptix, Inc. Tear shaping for refractive correction
US11672698B2 (en) 2013-11-04 2023-06-13 Tearoptix, Inc. Conjunctival cover and methods therefor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060082345A (ko) * 2005-01-12 2006-07-18 김석환 각막과의 밀착을 방지하기 위한 양압 발생 기능을 갖는콘택트 렌즈
KR102653361B1 (ko) * 2022-10-12 2024-04-04 주식회사 뷰사이언스 눈물보존기능을 가지는 소프트콘택트렌즈

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5428412A (en) * 1991-08-23 1995-06-27 Stoyan; Nick Method for treating myopia with an aspheric corneal contact lens
JPH0743698U (ja) * 1993-03-29 1995-09-05 株式会社レインボーオプチカル研究所 コンタクトレンズ
US5929968A (en) * 1995-11-01 1999-07-27 Cotie; Robert L. Scleral-corneal contact lens
KR20020049710A (ko) * 2000-12-20 2002-06-26 노시철 산소 투과성 하드렌즈의 눈물 순환장치
US6520637B2 (en) * 1999-08-20 2003-02-18 Art Optical Contact Lens, Inc. Low-mass ophthalmic lens

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5428412A (en) * 1991-08-23 1995-06-27 Stoyan; Nick Method for treating myopia with an aspheric corneal contact lens
US5428412B1 (en) * 1991-08-23 2000-08-08 Contex Inc Method for treating myopia with an aspheric corneal contact lens
JPH0743698U (ja) * 1993-03-29 1995-09-05 株式会社レインボーオプチカル研究所 コンタクトレンズ
US5929968A (en) * 1995-11-01 1999-07-27 Cotie; Robert L. Scleral-corneal contact lens
US6520637B2 (en) * 1999-08-20 2003-02-18 Art Optical Contact Lens, Inc. Low-mass ophthalmic lens
KR20020049710A (ko) * 2000-12-20 2002-06-26 노시철 산소 투과성 하드렌즈의 눈물 순환장치

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2014192853A1 (ja) * 2013-05-30 2017-02-23 株式会社シード 環状デバイス
US9921419B2 (en) 2013-05-30 2018-03-20 Seed Co., Ltd. Annular device
WO2014192853A1 (fr) * 2013-05-30 2014-12-04 株式会社シード Dispositif annulaire
US12076272B2 (en) 2013-11-04 2024-09-03 Tearoptix, Inc. Conjunctival cover and methods therefor
US11672698B2 (en) 2013-11-04 2023-06-13 Tearoptix, Inc. Conjunctival cover and methods therefor
US9395557B2 (en) 2014-11-12 2016-07-19 Vance M. Thompson Partial corneal conjunctival contact lens
US9910295B2 (en) 2014-11-12 2018-03-06 Vance M. Thompson Partial corneal conjunctival contact lens
US11567348B2 (en) 2015-03-11 2023-01-31 Tearoptix, Inc. Tear shaping for refractive correction
US9869883B2 (en) 2015-03-11 2018-01-16 Vance M. Thompson Tear shaping for refractive correction
US12044904B2 (en) 2015-03-11 2024-07-23 Tearoptix, Inc. Tear shaping for refractive correction
US10684493B2 (en) 2015-03-11 2020-06-16 Vance M. Thompson Tear shaping for refractive correction
US11281023B2 (en) 2016-10-17 2022-03-22 Tearoptix, Inc. Tear shaping for refractive correction
US12105359B2 (en) 2016-10-17 2024-10-01 Tearoptix, Inc. Tear shaping for refractive correction
US11460719B2 (en) 2017-05-01 2022-10-04 Pres-By Vision Ltd. Dynamic tear lenses
CN110892313B (zh) * 2017-05-01 2022-04-01 普雷斯拜视力有限公司 动态泪液透镜
US11947196B2 (en) 2017-05-01 2024-04-02 Pres-By Vision Ltd. Dynamic tear lenses
CN110892313A (zh) * 2017-05-01 2020-03-17 普雷斯拜视力有限公司 动态泪液透镜
US11703695B2 (en) 2018-04-06 2023-07-18 Tearoptix, Inc. Tear shaping for refractive correction
US10678067B2 (en) 2018-04-06 2020-06-09 Vance M. Thompson Tear shaping for refractive correction
US12210226B2 (en) 2018-04-06 2025-01-28 Tearoptix, Inc. Tear shaping for refractive correction
WO2022034957A1 (fr) * 2020-08-11 2022-02-17 (주)메디오스 Lentille de contact souple

Also Published As

Publication number Publication date
KR20040055763A (ko) 2004-06-26
KR100485763B1 (ko) 2005-04-28

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