WO2000060403A1 - Types de lentilles multifocale avec puissances optiques sur faces anterieure et posterieure - Google Patents

Types de lentilles multifocale avec puissances optiques sur faces anterieure et posterieure Download PDF

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Publication number
WO2000060403A1
WO2000060403A1 PCT/US2000/008754 US0008754W WO0060403A1 WO 2000060403 A1 WO2000060403 A1 WO 2000060403A1 US 0008754 W US0008754 W US 0008754W WO 0060403 A1 WO0060403 A1 WO 0060403A1
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WO
WIPO (PCT)
Prior art keywords
lens
power
optical power
optical
front surface
Prior art date
Application number
PCT/US2000/008754
Other languages
English (en)
Inventor
Jeffrey Roffman
Original Assignee
Johnson & Johnson Vision Care, Inc.
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 Johnson & Johnson Vision Care, Inc. filed Critical Johnson & Johnson Vision Care, Inc.
Priority to AU43295/00A priority Critical patent/AU4329500A/en
Publication of WO2000060403A1 publication Critical patent/WO2000060403A1/fr

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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
    • G02C7/041—Contact lenses for the eyes bifocal; multifocal
    • G02C7/044—Annular configuration, e.g. pupil tuned
    • 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
    • G02C7/042—Simultaneous type

Definitions

  • the present invention relates generally to multifocal lens designs. More particularly, the present invention pertains to multifocal lens designs with optical powers provided on both the front surface and back surface of the lens.
  • the present invention pertains to ophthalmic lenses, and in particular to contact lenses such as soft hydrogel contact lenses, and intraocular lenses, having more than one optical power or focal length. It is well known that as an individual ages, the eye is less able to accommodate, i.e., bend the natural lens in the eye in order to focus on objects that are relatively near to the observer. This condition is referred to as presbyopia, and presbyopes have in the past relied upon spectacles or other lenses having a number of different regions with different optical powers to which the wearer can shift his vision in order to find the appropriate optical power for the object or objects upon which the observer wishes to focus.
  • the process involves shifting one's field of vision from typically an upper lens portion far power to a lower lens portion near power.
  • soft or hydrogel contact lenses however, this approach has been less than satisfactory.
  • the contact lens working in conjunction with the natural lens, forms an image on the retina of the eye by focusing light incident on each part of the cornea from different field angles onto each part of the retina in order to form an image. This is demonstrated by the fact that as the pupil contracts in response to brighter light, the image on the retina does not shrink, but rather, light comes through a smaller area of the lens to form the entire image.
  • the lens provided is usually set at a single infinite distance focal power, and spectacles are worn to provide the additional positive optical power needed for in-focus closer vision.
  • a functional multifocal lens would be particular useful.
  • U.S. Pat. No. 5,448,312 entitled PUPIL TUNED MULTIFOCAL OPHTHALMIC LENS discloses a multifocal concentric ophthalmic lens for presbyopic patients constructed with three general annular lens portions in a multifocal design.
  • a central circular portion of the lens has only the patient's distance corrective power, and is surrounded by a first inner annular portion, which can consist of multiple annular rings having an inner radial portion which enhances the patient's near focal power encircled by radial portions of substantially equal cumulative amounts of distance and near optical power focal correction for the patient.
  • a second outer annular portion which can also consist of one or more annular rings having additional distance focal power near the periphery of the optical surface area of the ophthalmic lens.
  • Each annular ring has either a near or distance optical power and works in combination with other lens portions to yield the desired focal ratio in that portion of the lens.
  • U.S. Patent No. 5,485,228, entitled MULTIFOCAL OPHTHALMIC LENS PAIR discloses a pair of ophthalmic lenses both containing at least two optical powers, one is biased for near vision and one is biased for distance vision. Both lenses, however, contain the distance power in the center portion of the lens.
  • the remainder of the lens includes annular portions, each made of one or more optical zones to provide the desired combined, cumulative ratio of near and distance focal length areas at each pupil diameter.
  • the center portion of the vision contains a single optical power which results in improved visual acuity. This distance portion in the center is particularly well suited to the real world situation of requiring distance vision under high illumination situations.
  • a front surface design can cause a ghost image to form, i.e., the distance image and the near image are both sharp and are both presented at the same time to the eye.
  • the present invention provides a contact or intraocular lens in which the optical add power is divided between the front surface of the lens and the back surface of the lens.
  • the division between front surface power and back surface power may vary across a wide spectrum, ranging from nearly all front surface power to nearly all back surface power, and all points in between, depending on the particular lens requirements.
  • the lens may be of the type which matches the distribution of near, intermediate and distance focal vision corrections to the type of human activity typically undertaken in various illumination conditions.
  • the lens may also be of the type which matches the particular dimensions of a contact lens to suit the size of the pupil of the wearer as a function of illumination intensity.
  • the ophthalmic lens may be of the type designed to provide predominantly distance correction under high illumination, nearly evenly divided distance and near corrections under moderate illumination, and provide intermediate, vision correction under low to moderate illumination levels.
  • the lens may also be of the type designed to match the wearer's pupil size as a function of illumination level, and in preferred embodiments by also applying pupil size parameters as a function of the age of the wearer.
  • the present invention provides a multifocus, concentric annular ring lens wherein on both the front and rear surfaces of the lens, there is defined a central area comprising a circular disc having a spherical surface corresponding to a basic prescription spherical distance optical power.
  • a plurality of annular rings surround the central area and have alternating spherical near optical powers and spherical distance optical powers, and optionally, at least one intermediate optical power annular ring.
  • the intermediate optical power annular ring may be located in the outer region of the lens optic zone, and its optical power is intermediate to the distance and near optical powers, to provide visual acuity at intermediate distances.
  • the intermediate optical power annular ring or rings can be placed in the outer radial portion of the optic zone, where it can be an annular ring in that portion, or it may consist of the entire outer radial portion, or it can be placed in the middle radial portion, where it is preferably placed in the outer edge thereof, or it may be placed anywhere in that portion.
  • the lens can be a contact lens to be worn on the cornea of the eye, such as a soft hydrogel contact lens, or an be an intraocular lens.
  • the central area and the plurality of annular rings are essentially formed on both the front surface and the back surface of a contact lens, such that the cumulative front surface power and back surface power corresponds to the desired prescriptive power of the lens.
  • the widths of the individual annular rings can be different to generate a power profile which varies to generate different ratios of distance optical power to intermediate and near optical power.
  • FIG. 1 shows the front optical zone of an ophthalmic lens constructed according to the principles of the present invention
  • FIG. 2 shows the front optical zone of an ophthalmic lens constructed according to the principles of the present invention
  • FIG. 3 is a bar graph/histogram illustrating the cumulative combination of front surface power and back surface power according to the present invention
  • FIG. 4 shows the front optical zone of an ophthalmic lens constructed according to the principles of the present invention.
  • FIG. 5 shows the front optical zone of a pair of ophthalmic lenses constructed according to the principles of the present invention.
  • FIG. 1 illustrates one type of lens 10 designed pursuant to the teachings of the present invention wherein a central area 12 is a circular disc containing the basic prescribed Rx spherical distance power, and is surrounded by a plurality of alternating spherical near power and spherical distance power annular rings 14, 16, 18 and 20.
  • a central area 12 is a circular disc containing the basic prescribed Rx spherical distance power, and is surrounded by a plurality of alternating spherical near power and spherical distance power annular rings 14, 16, 18 and 20.
  • an intermediate optical power annular ring 22 having an optical power intermediate to the distance and near optical powers, is added as the second outermost annular ring.
  • the intermediate optical power annular ring 22 is encompassed by an outermost distance optical power annular ring 24.
  • a preferred intermediate optical power is 50% of the difference between the distance and near optical powers, but could be chosen to be any optical power between the distance and near optical powers.
  • a preferred position for the intermediate optical power annular ring is in the outer region of the lens optic zone 26, preferably the second outermost annular ring 22 from the outer edge of the lens optic zone 26.
  • the totality of the area encompassed by the outer circumference of the outermost ring 24 defines the optic zone 26 of the lens 10, which includes the areas of 12, 14, 16, 18, 20, 22 and 24.
  • the optic zone 26 is surrounded by a peripheral zone 28, which is a nonoptical area of the lens, which is beveled at 30 to the outer circumference 32 of the lens.
  • the center disc 12 has a diameter of 2J 5 mm
  • annular ring 14 has a diameter of 3.30 mm
  • annular ring 16 has a diameter of 3.60 mm
  • annular ring 18 has a diameter of 4.30 mm
  • annular ring 20 has a diameter of 4.80 mm
  • annular ring 22 has a diameter of 5.35 mm
  • annular ring 24 has a diameter of 8.00 mm
  • the lenticular annular area 28 has a diameter of 13.0 mm to the start of beveled area 28 has a diameter of 13.0 mm to the start of beveled area 30, and the outer circumference of the lens has a diameter of 14.0 mm.
  • other dimensions may be used depending on the particular requirements of the desired lens.
  • FIG. 2 is a plan view of a second embodiment of a multifocal lens design having an intermediate optical power wherein the intermediate optical power annular ring 44 is the outermost annular ring 44 in the optical zone 46 of the lens.
  • a central area 33 is a circular disc containing the basic prescribed spherical distance power, and is surrounded by a plurality of alternating spherical near power and spherical distance power annular rings 34, 36, 38, 40 and 42.
  • the intermediate optical power annular ring is the outermost annular ring 44 within the lens optic zone 46.
  • the combined areas of the central spherical disk 33 and the surrounding annular rings 34 through 44 comprise the active optical area 46 of the lens, which is surrounded by a peripheral (nonoptical) area 48 which is beveled at its outer circumference at 50 to an outer circumferential edge 52.
  • a power profile can be created which generates different ratios of distance optical power to near and intermediate optical powers with increasing distance from the center of the lens.
  • a person's pupil size is a function which is dependent upon light intensity, and is an important parameter in the design of ophthalmic lenses, particularly contact lenses and intraocular lenses.
  • Reliable data was obtained from people in four different age groups. Those less than 20 years of age, those between 20 and 40 years of age, those between 40 and 60 years of age, and those over 60 years of age. These pupil measurements were made on test subjects at three different luminance levels, 250, 50 and 2.5 candellas per square meter (cd/m 2 ).
  • the 250 cd/m 2 level corresponds to extremely bright illumination typically outdoors in bright light.
  • the 50 cd/m 2 is a mixed level which is found in both indoors and outdoors.
  • the 2.5 cd/m 2 level is most typically found outdoors at night, usually in an uneven illumination situation such as night driving.
  • the activity that takes place is typically outdoors at night and usually involves distant vision tasks, such as driving an automobile.
  • the corrective powers as a function of the distance from the center of the lens must be a function of the patient's specifically measured pupil diameter at varying illumination levels, or it can be readily determined from the above information based upon the age of the patient.
  • ocular in vivo image quality measurement devices can be used to optimize the ocular image quality in the concentric annular ring designs to produce even more improved designs. This is accomplished by using an in vivo image quality measurement device, such as an aberroscope or MTF point spread measuring device, to measure and decrease the sum of the aberrations of the combination of the lens and the eye system.
  • an in vivo image quality measurement device such as an aberroscope or MTF point spread measuring device
  • FIG. 3 therein is illustrated a bar graph/histogram showing the division of front power and back power according to the present invention.
  • the front add power "a” is the amount of the total optical power which is formed on the front surface of the lens
  • the back add power "b” is the amount of the total optical power which is formed on the back surface of the lens.
  • the front power and the back power cumulatively combine, "a” + “b", to provide 100% of the required optical add power.
  • substantially the same concentric pattern is formed on both the front surface and back surface of the lens.
  • FIGS. 1 and 2 illustrate the optical surface of the front surface, it being understood that in accordance with the present invention, the optical surface of the back surface is substantially similar to that of the front surface, the only difference being in the amount of power provided by each of the surfaces.
  • FIG. 4 illustrates the optical surface of an alternative ophthalmic lens constructed according to the present invention.
  • the center and second, fourth and sixth annular portions "D" of the optical surface are distance vision.
  • the first, third and fifth annular portions “N” are near vision.
  • the lens design of FIG. 4 does not include an intermediate power portion.
  • the lens design of FIG. 4 is such that the front add power "a” and the back add power "b” cumulatively combine, "a” + “b", to provide 100% of the required optical power.
  • substantially the same concentric pattern is formed on both the front surface and back surface of the lens.
  • the percent of near add power formed on the front surface versus that formed on the back surface is allowed to vary between almost 0 and almost 100%, with almost 0% being substantially all back power and almost 100% being substantially all front power.
  • FIG. 5 therein is illustrated the optical zone of the front surface of a pair of ophthalmic lenses constructed according to U.S. Patent No. 5,485,228, which are modified to include the teachings of the present invention. Specifically, the front add power "a" and the back add power "b" cumulatively combine, "a” + “b", to provide 100% of the required optical power. To achieve this division of front power and back power, substantially the same concentric pattern is formed on both the front surface and back surface of the lens. The percent of near add power formed on the front surface versus that formed on the back surface is allowed to vary between almost 0 and almost 100%, with almost 0% being substantially all back power and almost 100% being substantially all front power

Abstract

Cette invention concerne une lentille de contact ou intraoculaire dans laquelle la puissance optique est répartie entre la face antérieure et la face postérieure de la lentille. Cette répartition entre face antérieure et face postérieure peut varier à l'intérieur d'un large spectre, la puissance pouvant être concentrée dans sa quasi totalité sur la face antérieure ou sur la quasi-totalité de la face postérieure, ou bien sur tous les points entre ces deux faces, selon les exigences spécifiques auxquelles doit répondre la lentille. La lentille conçue selon cette invention est telle que la puissance antérieure ajoutée 'a' et la puissance postérieure ajoutée 'b' se combinent de façon cumulative ('a' + 'b') pour fournir 100 % de la puissance optique requise. La répartition de la puissance entre avant et arrière s'obtient grâce au même dessin concentrique à la fois sur la faces antérieure et sur la face postérieure de la lentille. En termes de pourcentage, le gain de puissance sur la face antérieure par rapport au gain de puissance sur la face arrière peut varier entre presque 0 % et presque 100 %, presque 0 % correspondant pour l'essentiel à toute la puissance postérieure et presque 100 % essentiellement à toute la puissance antérieure.
PCT/US2000/008754 1999-04-02 2000-03-31 Types de lentilles multifocale avec puissances optiques sur faces anterieure et posterieure WO2000060403A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU43295/00A AU4329500A (en) 1999-04-02 2000-03-31 Multifocal lens designs with front surface and back surface optical powers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US28543199A 1999-04-02 1999-04-02
US09/285,431 1999-04-02

Publications (1)

Publication Number Publication Date
WO2000060403A1 true WO2000060403A1 (fr) 2000-10-12

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AR (1) AR026115A1 (fr)
AU (1) AU4329500A (fr)
WO (1) WO2000060403A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012101587A1 (fr) 2011-01-28 2012-08-02 Koninklijke Philips Electronics N.V. Véhicules pour la libération locale de promédicaments hydrophiles

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5448312A (en) * 1992-12-09 1995-09-05 Johnson & Johnson Vision Products, Inc. Pupil-tuned multifocal ophthalmic lens
US5485228A (en) * 1991-07-10 1996-01-16 Johnson & Johnson Vision Products, Inc. Multifocal ophthalmic lens pair
WO1996008745A1 (fr) * 1994-09-16 1996-03-21 Permeable Technologies, Inc. Lentilles de contact multifocales et procede de production de ces lentilles
EP0742461A2 (fr) * 1995-05-04 1996-11-13 JOHNSON & JOHNSON VISION PRODUCTS, INC. Lentilles asphériques et toriques
EP0756189A2 (fr) * 1995-05-04 1997-01-29 JOHNSON & JOHNSON VISION PRODUCTS, INC. Lentilles multifocales à pouvoir moyenne
US5835187A (en) * 1996-11-22 1998-11-10 Wilmington Partners L.P. Aspheric multifocal contact lens having concentric front surface

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5485228A (en) * 1991-07-10 1996-01-16 Johnson & Johnson Vision Products, Inc. Multifocal ophthalmic lens pair
US5448312A (en) * 1992-12-09 1995-09-05 Johnson & Johnson Vision Products, Inc. Pupil-tuned multifocal ophthalmic lens
WO1996008745A1 (fr) * 1994-09-16 1996-03-21 Permeable Technologies, Inc. Lentilles de contact multifocales et procede de production de ces lentilles
EP0742461A2 (fr) * 1995-05-04 1996-11-13 JOHNSON & JOHNSON VISION PRODUCTS, INC. Lentilles asphériques et toriques
EP0756189A2 (fr) * 1995-05-04 1997-01-29 JOHNSON & JOHNSON VISION PRODUCTS, INC. Lentilles multifocales à pouvoir moyenne
US5835187A (en) * 1996-11-22 1998-11-10 Wilmington Partners L.P. Aspheric multifocal contact lens having concentric front surface

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012101587A1 (fr) 2011-01-28 2012-08-02 Koninklijke Philips Electronics N.V. Véhicules pour la libération locale de promédicaments hydrophiles

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AU4329500A (en) 2000-10-23
AR026115A1 (es) 2003-01-29

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