CA2404554A1 - Contact lens having a uniform horizontal thickness profile - Google Patents

Contact lens having a uniform horizontal thickness profile Download PDF

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Publication number
CA2404554A1
CA2404554A1 CA002404554A CA2404554A CA2404554A1 CA 2404554 A1 CA2404554 A1 CA 2404554A1 CA 002404554 A CA002404554 A CA 002404554A CA 2404554 A CA2404554 A CA 2404554A CA 2404554 A1 CA2404554 A1 CA 2404554A1
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CA
Canada
Prior art keywords
zone
superior
contact lens
inferior
edge
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.)
Granted
Application number
CA002404554A
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French (fr)
Other versions
CA2404554C (en
Inventor
Arthur Back
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.)
CooperVision International Holding Co LP
Original Assignee
Ocular Sciences, Inc.
Arthur Back
Tcc Acquisition Corp.
Coopervision, Inc.
Coopervision International Holding Company, Lp
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.)
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26889046&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2404554(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Ocular Sciences, Inc., Arthur Back, Tcc Acquisition Corp., Coopervision, Inc., Coopervision International Holding Company, Lp filed Critical Ocular Sciences, Inc.
Publication of CA2404554A1 publication Critical patent/CA2404554A1/en
Application granted granted Critical
Publication of CA2404554C publication Critical patent/CA2404554C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • 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

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)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Details Of Aerials (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Tumbler Switches (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

A contact lens (20) having a rotational stabilization mechanism thereon, and a thickness profile that reduces the torque imparted on the lens by the action of the eyelids. The prism ballast is provided on one or more portions of the anterior face of the lens such that the lens body has a uniform thickness of within 10% along horizontal cross-section. The anterior face of the lens may be segregated into a peripheral zone (24), an inner zone (26) circumscribed by the peripheral zone (24), and a central optic zone (22). The prism ballast portion is provided within the inner zone (26), which may be further subdivided into a superior portion (40), an intermediate portion (44) proximate the optic zone (22), and an inferior portion (48). The ballast portion increases in thickness along a superior-inferior line parallel to a vertical meridian, and has a substantially uniform thickness perpendicular thereto.

Claims (38)

1. A contact lens, comprising:
a contact lens body having a generally spherical base curvature with a convex anterior face, a concave posterior face, and a peripheral edge therebetween with a peripheral zone being defined adjacent the peripheral edge of the anterior face that is tapered thinner toward the peripheral edge of the lens, the body having a thickness between the anterior face and the posterior face and being non-axi-symmetric so as to define a superior edge and an inferior edge, with a vertical meridian being defined from the superior edge toward the inferior edge and a horizontal meridian being defined perpendicular thereto;
a plurality of zones on the anterior face, including an inner zone circumscribed by the peripheral zone, and an optic zone defined generally in the middle of the inner zone, wherein the inner zone includes a ballast portion and the thickness increases parallel to the vertical meridian from the superior edge toward the inferior edge in at least the ballast portion of the inner zone;
wherein the inner zone comprises a superior portion between the optic zone and the superior extent of the inner zone, an inferior portion between the optic zone and the inferior extent of the inner zone, and an intermediate portion between the superior and inferior portions; and the ballast portion is defined within one or more of the superior, intermediate, and inferior portions and has a series of consecutive horizontal cross-sections exclusive of the peripheral zone and optic zone spanning a distance along the vertical meridian of at least 20% of the smallest dimension of the superior, intermediate, and inferior portions as measured along the vertical meridian, wherein each horizontal cross-section has a substantially uniform thickness not varying by more than about 30 µm or 20%, whichever is greater in absolute terms.
2. The contact lens of claim 1, wherein the thickness of the at least one horizontal cross-section does not vary by more than about 15 µm or 10%, whichever is greater in absolute terms.
3. The contact lens of claim 1, wherein, along a 225° meridian, the distance between the inner zone and the peripheral edge is less than about 1.45 mm.
4. The contact lens of claim 1, wherein, along a 225° meridian, a rate of change of thickness in the tapered peripheral zone is less than about 250 µm/mm.
5. The contact lens of claim 1, wherein the ballast portion is a prism ballast.
6. The contact lens of claim 1, wherein the ballast portion spans a distance along the vertical meridian of at least 50% of the smallest dimension of the superior, intermediate, and inferior portions as measured along the vertical meridian.
7. The contact lens of claim 1, wherein the ballast portion is defined wholly within only one of the superior, intermediate, and inferior portions.
8. The contact lens of claim 1, wherein the ballast portion is defined wholly within only two of the superior, intermediate, and inferior portions.
9. The contact lens of claim 1, wherein the ballast portion is defined within all three of the superior, intermediate, and inferior portions.
10. The contact lens of claim 1, wherein the ballast portion spans a distance along the vertical meridian of at least 50% of the respective dimensions of the superior, intermediate, and inferior portions as measured along the vertical meridian.
11. The contact lens of claim 10, wherein the ballast portion spans a distance along the vertical meridian of at least 100% of the respective dimensions of the superior, intermediate, and inferior portions as measured along the vertical meridian.
12. The contact lens of claim 11, wherein the ballast portion is provided on the entire inner zone including the optic zone.
13. The contact lens of claim 11, wherein the ballast portion is provided on the entire inner zone except for the optic zone.
14. The contact lens of claim 1, further including a cylindrical correction on either the anterior face or the posterior face.
15. The contact lens of claim 14, wherein the cylindrical correction is provided on the posterior face, and wherein the optic zone of the anterior face comprises a spherical correction.
16. The contact lens of claim 1, wherein the inner zone is of substantially uniform radial width around the circumference of the lens.
17. The contact lens of claim 16, wherein a band circumscribed by the peripheral zone and around the optic zone is substantially annular, with a superior distance A
being defined along the vertical meridian and within the inner zone from the optic zone to the peripheral zone, and an inferior distance B being defined along the vertical meridian and within the inner zone from the optic zone to the peripheral zone, and wherein 0.25A <= B <= A.
18. The contact lens of claim 1, wherein the body is a soft contact lens.
19. The contact lens of claim 1, wherein the ballast portion is a periballast.
20. The contact lens of claim 1, wherein the lens further incorporates a dynamic stabilization mechanism.
21. The contact lens of claim 1, wherein the lens further incorporates a negative spherical power distance correction.
22. A contact lens, comprising:
a contact lens body having a generally spherical base curvature with a convex anterior face, a concave posterior face, and a peripheral edge therebetween with a peripheral zone being defined adjacent the peripheral edge of the lens that tapers thinner toward the peripheral edge of the lens, the body having a thickness between the anterior face and the posterior face and being non-axi-symmetric so as to define a superior edge and an inferior edge, with a vertical meridian being defined from the superior edge toward the inferior edge and a horizontal meridian being defined perpendicular thereto;

wherein the anterior face defines a plurality of zones thereon, including an inner zone circumscribed by the peripheral zone and having a prism ballast portion therein, and an optic zone defined generally in the middle of the inner zone, wherein the thickness increases parallel to the vertical meridian from the superior edge toward the inferior edge in at least the prism ballast portion of the inner zone; and wherein, along a 225° meridian, the distance between the inner zone and the peripheral edge is less than about 1.4 mm.
23. The contact lens of claim 22, wherein, along the 225° meridian, a rate of change of thickness in the tapered peripheral zone is less than about 250 µm/mm.
24. The contact lens of claim 23, wherein, along the 225° meridian, a rate of change of thickness in the tapered peripheral zone is less than about 200 µm/mm.
25. The contact lens of claim 22, wherein the maximum thickness along a 225° meridian of the lens is between about 200-400 µm.
26. The contact lens of claim 25, wherein the maximum thickness along the 225° meridian is between about 250-350 µm.
27. The contact lens of claim 22, wherein the inner zone comprises a superior portion between the optic zone and the superior extent of the inner zone, an inferior portion between the optic zone and the inferior extent of the inner zone, and an intermediate portion between the superior and inferior portions, and wherein the prism
28 ballast portion is defined within one or more of the superior, intermediate, and inferior portions and has a series of consecutive horizontal cross-sections exclusive of the peripheral zone and optic zone spanning a distance along the vertical meridian of at least 20% of the smallest dimension of the superior, intermediate, and inferior portions as measured along the vertical meridian, wherein each horizontal cross-section has a substantially uniform thickness not varying by more than about 30 µm or 20%, whichever is greater in absolute terms.
28. The contact lens of claim 22, wherein, along a 270° meridian, the distance between the inner zone and the peripheral edge is less than about 1.8 mm.
29. A molded contact lens, comprising:
a fully molded contact lens body having a generally spherical base curvature with a convex anterior face, a concave posterior face, and a peripheral edge therebetween with a peripheral zone being defined adjacent the peripheral edge of the lens that tapers thinner toward the peripheral edge of the lens, the body having a thickness between the anterior face and the posterior face and being non-axi-symmetric so as to define a superior edge and an inferior edge, with a vertical meridian being defined from the superior edge toward the inferior edge and a horizontal meridian being defined perpendicular thereto;
wherein the anterior face defines a plurality of zones thereon, including an inner zone circumscribed by the peripheral zone and having a prism ballast portion therein, and an optic zone defined generally in the, middle of the inner zone, wherein the thickness increases parallel to the vertical meridian from the superior edge toward the inferior edge in at least the prism ballast portion of the inner zone; and wherein, along a 225° meridian, the distance between the inner zone and the peripheral edge is less than about 1.8 mm.
30. The contact lens of claim 29, wherein the maximum thickness along the 225° meridian is between about 200-400 um.
31. The contact lens of claim 29, wherein the inner zone comprises a superior portion between the optic zone and the superior extent of the inner zone, an inferior portion between the optic zone and the inferior extent of the inner zone, and an intermediate portion between the superior and inferior portions, and wherein the prism ballast portion is defined within one or more of the superior, intermediate, and inferior portions and has a series of consecutive horizontal cross-sections exclusive of the peripheral zone and optic zone spanning a distance along the vertical meridian of at least 20% of the smallest dimension of the superior, intermediate, and inferior portions as measured along the vertical meridian, wherein each horizontal cross-section has a substantially uniform thickness not varying by more than about 30 µm or 20%, whichever is greater in absolute terms.
32. The contact lens of claim 29, wherein, along a 270° meridian, the distance between the inner zone and the peripheral edge is less than about 2.1 mm.
33. The contact lens of claim 29, along a 180°
meridian, the distance between the inner zone and the peripheral edge is less than about 1.3 mm.
34. A molded contact lens, comprising:
a fully molded contact lens body having a generally spherical base curvature with a convex anterior face, a concave posterior face, and a peripheral edge therebetween with a peripheral zone being defined adjacent the peripheral edge of the lens that tapers thinner toward the peripheral edge of the lens, the body having a thickness between the anterior face and the posterior face and being non-axi-symmetric so as to define a superior edge and an inferior edge, with a vertical meridian being defined from the superior edge toward the inferior edge and a horizontal meridian being defined perpendicular thereto;
wherein the anterior face defines a plurality of zones thereon, including an inner zone circumscribed by the peripheral zone and having a prism ballast portion therein, and an optic zone defined generally in the middle of the inner zone, wherein the thickness increases parallel to the vertical meridian from the superior edge toward the inferior edge in at least the prism ballast portion of the inner zone; and wherein, along a 180° meridian, the distance between the inner zone and the peripheral edge is less than about 1.3 mm.
35. The contact lens of Claim 34, wherein, along a 270° meridian, the distance between the inner zone and the peripheral edge is less than about 2.1 mm.
36. The contact lens of claim 34, wherein the inner zone comprises a superior portion between the optic zone and the superior extent of the inner zone, an inferior portion between the optic zone and the inferior extent of the inner zone, and an intermediate portion between the superior and inferior portions, and wherein the prism ballast portion is defined within one or more of the superior, intermediate, and inferior portions and has a series of consecutive horizontal cross-sections exclusive of the peripheral zone and optic zone spanning a distance along the vertical meridian of at least 20% of the smallest dimension of, the superior, intermediate, and inferior portions as measured along the vertical meridian, wherein each horizontal cross-section has a substantially uniform thickness not varying by more than about 30 µm or 20%, whichever is greater in absolute terms.
37. A contact lens, comprising:
a contact lens body having a generally spherical base curvature with a convex anterior face, a concave posterior face, and a peripheral edge therebetween with a peripheral zone being defined adjacent the peripheral edge of the lens that tapers thinner toward the peripheral edge of the lens, the body having a thickness between the anterior face and the posterior face and being non-axi-symmetric so as to define a superior edge and an inferior edge, with a vertical meridian being defined from the superior edge toward the inferior edge and a horizontal meridian being defined perpendicular thereto;
wherein the anterior face defines a plurality of zones thereon, including an inner zone circumscribed by the peripheral zone and having a ballast portion therein, and an optic zone defined generally in the middle of the inner zone, wherein the thickness increases parallel to the vertical meridian from the superior edge toward the inferior edge in at least the ballast portion of the inner zone; and wherein a band circumscribed by the peripheral zone and around the optic zone is substantially annular, with a superior distance A being defined along the vertical meridian and within the inner zone from the optic zone to the peripheral zone, and an inferior distance B being defined along the vertical meridian and within the inner zone from the optic zone to the peripheral zone, and wherein 0.55A <= B <= A.
38. A molded contact lens, comprising:
a contact lens body having a generally spherical base curvature with a convex anterior face, a concave posterior face, and a peripheral edge therebetween with a peripheral zone being defined adjacent the peripheral edge of the lens that tapers thinner toward the peripheral edge of the lens, the body having a thickness between the anterior face and the posterior face and being non-axi-symmetric so as to define a superior edge and an inferior edge, with a vertical meridian being defined from the superior edge toward the inferior edge and a horizontal meridian being defined perpendicular thereto;
wherein the anterior face defines a plurality of zones thereon, including an inner zone circumscribed by the peripheral zone and having a molded prism ballast portion therein, and an optic zone defined generally in the middle of the inner zone, wherein the thickness increases parallel to the vertical meridian from the superior edge toward the inferior edge in at least the ballast portion of the inner zone; and wherein a band circumscribed by the peripheral zone and around the optic zone is substantially annular, with a superior distance A being defined along the vertical meridian and within the inner zone from the optic zone to the peripheral zone, and an inferior distance B being defined along the vertical meridian and within the inner zone from the optic zone to the peripheral zone, and wherein 0,33A <= B <= A.
CA2404554A 2000-03-31 2001-03-28 Contact lens having a uniform horizontal thickness profile Expired - Fee Related CA2404554C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US19349300P 2000-03-31 2000-03-31
US60/193,493 2000-03-31
US09/818,244 US6467903B1 (en) 2000-03-31 2001-03-27 Contact lens having a uniform horizontal thickness profile
US09/818,244 2001-03-27
PCT/US2001/009923 WO2001075509A1 (en) 2000-03-31 2001-03-28 Contact lens having a uniform horizontal thickness profile

Publications (2)

Publication Number Publication Date
CA2404554A1 true CA2404554A1 (en) 2001-10-11
CA2404554C CA2404554C (en) 2010-07-06

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ID=26889046

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CA2404554A Expired - Fee Related CA2404554C (en) 2000-03-31 2001-03-28 Contact lens having a uniform horizontal thickness profile

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US (9) US6467903B1 (en)
EP (1) EP1281099B1 (en)
JP (1) JP2004506925A (en)
KR (2) KR100910710B1 (en)
CN (1) CN1232864C (en)
AT (1) ATE358289T1 (en)
AU (1) AU2001247847A1 (en)
BR (1) BR0109734A (en)
CA (1) CA2404554C (en)
DE (2) DE60127547T2 (en)
ES (1) ES2280354T3 (en)
HK (2) HK1051406A1 (en)
MX (1) MXPA02009327A (en)
WO (1) WO2001075509A1 (en)

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