System incorporation two different sphero-non-spherical contact lenses for correcting presbytia

• US 5,574,518 A
• Filed: 01/10/1995
• Issued: 11/12/1996
• Est. Priority Date: 01/10/1995
• Status: Expired due to Term

• Current Assignee: Coopervision International Limited (The Cooper Cos., Inc.)
• Original Assignee: Les Laboratoires Opti-Centre Inc.
• Inventors: Mercure, Robert
• Primary Examiner(s): Epps, Georgia Y.
• Assistant Examiner(s): SCHWARTZ, JORDAN MARC
• Application Number:
  US08/370,666
• Time in Patent Office: 672 Days
• Field of Search: 351/161, 351/160 R, 351/160 H
• US Class Current: 351/161
• CPC Class Codes: G02C 7/027 considering wearer's parameters
• CPC Class Codes: G02C 7/042 Simultaneous type
• CPC Class Codes: G02C 7/044 Annular configuration, e.g. pupil tuned

Abstract

The first contact lens is placed on the dominating eye and includes a central spherical area for distance vision, which is surrounded by an annular non-spherical area having a diopter in the form of progressive addition which varies from zero addition at the inner periphery to a maximum addition at the outer periphery, and which enables vision, at all distances including reading. The second contact lens is placed on the dominated eye. The central area is spherical and adjusted for reading. The non-spherical annular area has a progressive reduction from maximum addition to zero addition, which enables vision from reading to intermediate and distance vision. This system provides in most cases 95-100% vision at all distances.

Claims

1. A binocular vision system for correcting presbyopia by means of sphero-non-spherical contact lenses, said system comprising the combination of the following contact lenses:

a first multifocal contact lens comprising on a front face thereof, a first central area having a spherical surface, said front central area being dimensioned to cover about 65% to about 85% of a pupil of an eye of a person, and having a diameter which varies between about 1.8 to 3.7 mm, and a first annular shaped area surrounding the first central area, having a non-spherical surface which has a diopter power in the form of a progressive addition which varies from a zero addition at inner periphery of said first annular shaped area to a maximum addition at outer periphery thereof, said non-spherical area enabling vision at all distances including reading,

said first central area incorporating a correction for distance vision, said first annular shaped non-spherical area incorporating gradual correction from distance correction to intermediate and reading corrections,

said first multifocal contact lens being adjusted to adapt to the vision of a dominant eye of said person,

a second multifocal lens comprising on a front face thereof a second central area having a spherical surface being dimensioned to cover about 45% to 70% of a pupil of another eye of said person and having a diameter which varies between about 1.4 and 2.9 mm, and a second annular shaped area surrounding said second central area, having a non-spherical surface which has a diopter power in the form of a progressive reduction which varies from a maximum addition at inner periphery thereof to a zero addition at outer periphery thereof, said non-spherical area enabling vision at all distances including reading,

said second central area incorporating a correction for reading, said second annular shaped area incorporating gradual correction from reading to intermediate and distance correction,

said second multifocal contact lens being adjusted to adapt to the vision of a dominated eye of said person.

2. A binocular vision system according to claim 1, wherein said first multifocal contact lens comprises a third annular shaped spherical area surrounding said first annular shaped area, said third annular shaped spherical area incorporating essentially a reading correction.

3. A binocular vision system according to claim 1, wherein said second multifocal contact lens comprises a fourth annular shaped spherical area surrounding said second annular shaped non-spherical area, said fourth annular shaped spherical area incorporating essentially a distance correction.

4. A binocular vision system according to claim 1, wherein said first and second annular shaped non-spherical areas have an outer diameter of about 3 to 7 mm depending on the diameter of the pupils and extend past said pupils.

5. A binocular vision system according to claim 1, wherein said first and second annular shaped non-spherical areas extend past said pupils all around thereof by an amount between about 0.25 to 1.53 mm.

6. A binocular vision system for correcting presbyopia by means of sphero-non-spherical contact lenses, said system comprising the combination of the following contact lenses:

a first multifocal contact lens comprising on a front face thereof, a first central area having a spherical surface, said front central area being dimensioned to cover about 65% to about 85% of a pupil of an eye of a person, and a first annular shaped area surrounding the first central area, having a non-spherical surface which has a diopter power in the form of a progressive addition which varies from a zero addition at inner periphery of said first annular shaped area to a maximum addition at outer periphery thereof, said non-spherical area enabling vision at all distances including reading,

said first central area incorporating a correction for distance vision, said first annular shaped non-spherical area incorporating gradual correction from distance correction to intermediate and reading corrections,

said first multifocal contact lens being adjusted to adapt to the vision of a dominant eye of said person,

a second multifocal lens comprising on a front face thereof a second central area having a spherical surface being dimensioned to cover about 45% to 70% of a pupil of another eye of said person, and a second annular shaped area surrounding said second central area, having a non-spherical surface which has a diopter power in the form of a progressive reduction which varies from a maximum addition at inner periphery thereof to a zero addition at outer periphery thereof, said non-spherical area enabling vision at all distances including reading,

said second central area incorporating a correction for reading, said second annular shaped area incorporating gradual correction from reading to intermediate and distance correction,

said second multifocal contact lens being adjusted to adapt to the vision of a dominated eye of said person,

said first and second annular shaped non-spherical areas have an outer diameter of about 3 to 7 mm depending on the diameter of the pupils and extend past said pupils.

7. A binocular vision system according to claim 6, wherein said first central area has a diameter which varies between about 1.8 to 3.7 mm, and wherein said second central area has a diameter which varies between about 1.4 and 2.9.

8. A binocular vision system for correcting presbyopia by means of sphero-non-spherical contact lenses, said system comprising the combination of the following contact lenses:

a first multifocal contact lens comprising on a front face thereof, a first central area having a spherical surface, said front central area being dimensioned to cover about 65% to about 85% of a pupil of an eye of a person, and a first annular shaped area surrounding the first central area, having a non-spherical spherical surface which has a diopter power in the form of a progressive additive addition which varies from a zero addition at inner periphery of said first annular shaped area to a maximum addition at outer periphery thereof, said non-spherical area enabling vision at all distances including reading,

said first central area incorporating a correction for distance vision, said first annular shaped non-spherical area incorporating gradual correction from distance correction to intermediate and reading corrections,

said first multifocal contact lens being adjusted to adapt to the vision of a dominant eye of said person,

a second multifocal lens comprising on a front face thereof a second central area having a spherical surface being dimensioned to cover about 45% to 70% of a pupil of another eye of said person, and a second annular shaped area surrounding said second central area, having a non-spherical surface which has a diopter power in the form of a progressive reduction which varies form a maximum addition at inner periphery thereof to a zero addition at outer periphery thereof, said non-spherical area enabling vision at all distances including reading,

said second central area incorporating a correction for reading, said second annular shaped area incorporating gradual correction from reading to intermediate and distance correction,

said second multifocal contact lens being adjusted to adapt to the visionof a dominated eye of said person,

said first multifocal contact lens comprises a third annular shaped spherical area surrounding said first annular shaped area, said third annular shaped spherical area incorporating essentially a reading correction,

said second multifocal contact lens comprises a forth annular shaped spherical area surrounding said second annular shaped non-spherical area, said forth annular shaped spherical area incorporating essentially a distance correction,

said third and forth annular shaped spherical areas having outer diameters between about 7.0 and 10.0 mm.