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
  • G02C7/041—Contact lenses for the eyes bifocal; multifocal
  • G02C7/043—Translating type
• • 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

Definitions

• This invention is related to contact lenses.
• the present invention is related to translating contact lenses each having a ramped ridge zone on the lower portion of the anterior surface that is able to control lens position on the eye in primary gaze and/or translation amount across the surface of the eye when the eye changes from gazing at an object at a distance to gazing at a nearby object.
• a soft translating multi-focal contact lens that is capable of translating across the surface of the eye when the eye changes position from distance vision to near vision and providing wearer's comfort.
• a soft translating multi-focal contact lens that can control the amount of translation across the surface of the eye when the eye changes position from distance vision to an intermediate vision or to near vision.
• the present invention which, in one aspect, is a translating contact lens having a central axis, an anterior surface and an opposite posterior surface.
• the posterior surface has an optical zone.
• the anterior surface includes an optical zone and a ramped ridge zone capable of controlling contact lens position on an eye in primary gaze and/or translating amount across the eye when the eye changes from gazing at an object at a distance to gazing at an object at an intermediate distance or at a nearby object.
• FIG. 1C is a detail view of a portion of FIG. 1 B.
• FIGs 3F-3J schematically show a translating contact lens having a ramped ridge zone including two bumps at the two ends of a latitudinal ridge according to a preferred embodiment of the invention.
• a translating contact lenses of the invention may be produced by any convenient means, for example, such as lathing and molding.
• contact lenses are molded from contact lens molds including molding surfaces that replicate the contact lens surfaces when a lens is cast in the molds.
• an optical cutting tool with a numerically controlled lathe may be used to form a metallic optical tool incorporating the features of the anterior surface of a translating contact lens of the invention. The tool is then used to make anterior surface molds that are then used, in conjunction with posterior surface molds, to form the lens of the invention using a suitable liquid lens-forming material placed between the molds followed by compression and curing of the lens-forming material.
• a contact lens having complicated surface feature or the optical tool to be used for making the same is fabricated by using a numerically controlled lathe, for example, such as Optoform ultra-precision lathes (models 30, 40, 50 and 80) having Variform piezo- ceramic fast tool servo attachment from Precitech, Inc, according to a method described in co-pending U.S. Patent Application No. , entitled Method for Manufacturing a contact lens, herein incorporated by reference in its entirety.
• a numerically controlled lathe for example, such as Optoform ultra-precision lathes (models 30, 40, 50 and 80) having Variform piezo- ceramic fast tool servo attachment from Precitech, Inc, according to a method described in co-pending U.S. Patent Application No. , entitled Method for Manufacturing a contact lens, herein incorporated by reference in its entirety.
• a “semi-diameter spoke” refers to a line segment from the central axis to the edge of a lens design.
• a "point spacing” refers to a distance between two points along the semi-diameter spoke.

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)
• Prostheses (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (2)

Family

ID=31188407

Family Applications (1)

Country Status (6)

Cited By (6)

Families Citing this family (35)

Citations (8)

Family Cites Families (3)

• 2003
  • 2003-07-09 US US10/616,476 patent/US6921168B2/en not_active Expired - Lifetime
  • 2003-07-23 EP EP03771075.3A patent/EP1527367B1/en not_active Expired - Lifetime
  • 2003-07-23 WO PCT/EP2003/008058 patent/WO2004011989A1/en not_active Ceased
  • 2003-07-23 CA CA2491460A patent/CA2491460C/en not_active Expired - Fee Related
  • 2003-07-23 JP JP2004523768A patent/JP4987229B2/ja not_active Expired - Fee Related
  • 2003-07-23 AU AU2003263184A patent/AU2003263184A1/en not_active Abandoned

Patent Citations (8)

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