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EP2038695A1 - Lentille de contact - Google Patents

Lentille de contact

Info

Publication number
EP2038695A1
EP2038695A1 EP07768921A EP07768921A EP2038695A1 EP 2038695 A1 EP2038695 A1 EP 2038695A1 EP 07768921 A EP07768921 A EP 07768921A EP 07768921 A EP07768921 A EP 07768921A EP 2038695 A1 EP2038695 A1 EP 2038695A1
Authority
EP
European Patent Office
Prior art keywords
contact lens
ridge
lens according
lens
friction
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.)
Withdrawn
Application number
EP07768921A
Other languages
German (de)
English (en)
Inventor
Bernardus Franciscus Maria Wanders
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.)
Procornea Holding BV
Original Assignee
Procornea Nederland BV
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
Priority claimed from US11/484,361 external-priority patent/US20080013044A1/en
Priority claimed from EP20060116967 external-priority patent/EP1879064A1/fr
Application filed by Procornea Nederland BV filed Critical Procornea Nederland BV
Priority to EP07768921A priority Critical patent/EP2038695A1/fr
Publication of EP2038695A1 publication Critical patent/EP2038695A1/fr
Withdrawn legal-status Critical Current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
    • G02C7/041—Contact lenses for the eyes bifocal; multifocal
    • 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

  • the present invention relates to a contact lens, in particular a contact lens for which the position or the orientation on the eye is of importance.
  • soft contact lenses have solved some of the problems that patients have experienced in not being able to wear rigid gas permeable (RGP) contact lenses, or in not being able to wear them for a longer period of time, because of initial discomfort.
  • RGP gas permeable
  • orientation stabilisation and/or translating features are incorporated into soft toric or translating bifocal contact lenses to avoid rotation onto the eye.
  • orientation stabilizing and/or translating features including prism ballast which is generally a base-down prism to increase weighting effect to orient the lens and to create a ridge which should engage with the lower eyelids to provide vertical translation or rotation stabilisation support, are for example mentioned in US4573775A1 (Bayshore), US4854089A1 (Morales), US5071244A1 (Ross Richard), EP0452549A1 (Woehlk), EP0858613A1 (Procornea), WO9923527A1 (Bernstein), WO0214929A1 (Novartis), WO2004011989A1 (Novartis), WO2004068214A1 (Novartis), WO2004092805A1 (Novartis), WO2004104675 A2 (Novartis), WO2006013101A2 (Novartis), US2005099595A1 (Novartis) and US4324461Al (Salvator
  • this contact lens has a ramped ridge at its lower (during wearing) part.
  • This ramped ridge is designed to have the lower lid of the eye keep the lens at its position while the eye ball goes down when for instance reading a book.
  • the lower part of the lens with a presbyopia-corrective optical part moves in front of the pupil, allowing a wearer to read.
  • the positioning of this contact lens can be improved.
  • WO-Al -89/07281 discloses in an embodiment a contact lens comprising at least one pattern on the front surface of the lens.
  • the pattern enabling proper location of the lens on the eye of a wearer by engagement between the lens, the eye and the eyelid and thereby facilitating the increased transmission of gas through the lens.
  • the pattern is arranged so as to allow the eyelid of the wearer to follow the contours of the patterns to enable the proper orientation of the lens on the eye. Again, specifically the upper eyelid moves the lens.
  • a specific type of pattern is not disclosed.
  • US-6.626.534 discloses a contact lens that is of generally uniform cross- section to allow proper transmission of oxygen to the eye. It contains an inner optic region and an outer radial zone. Parallel grooves are placed in the outer radial zone on the anterior surface of the lens to cause the lens to align when the eye is blinked. The grooves can form a fine grating and can be placed in a superior or inferior region of the outer radial zone, or they can be placed in a ring or other configuration in this region. These parallel grooves are typically to provide rotational orientation of the lens.
  • the invention aims to improve positioning of a contact lens on the eye, and maintaining this positioning during wear.
  • Another object of the invention is to improve the comfort of such a contact lens.
  • Yet another object of the invention is to provide such a contact lens which is easy to produce. Another object of the invention is to improve positioning of the contact lens for older people.
  • Yet another object of the invention is to provide a contact lens which is able to translate on the eye of a wearer during use via the lower eyelid.
  • a contact lens comprising at least one area with an increased friction for an eyelid for providing grip to the eyelid for positioning the contact lens on an eye in use, wherein said friction area comprises micro scale undulations for providing friction between an eyelid and the contact lens.
  • This provides the possibility of designing a contact lens which has a position behaviour which can be designed accurately, and with a behaviour which can be predicted and engineered.
  • the contact lens according to the invention comprising a central optical zone and a radially outer zone surrounding the central optical zone and having optical properties different from the central optical zone, and a ridge radially outside said outer zone.
  • said friction area is provided at the location of said ridge.
  • said friction area is provided in or on said ridge. In an embodiment said friction areas are provided at the location of said ridge and at both sides of a mirror line on said contact lens.
  • the contact lens is a so called soft contact lens, also referred to as hydro gel lens.
  • the friction area or areas are provided on a side of the ridge radially away from the centre of the contact lens.
  • said contact lens has an inner surface resting on an eye during wearing and an outer surface, said friction area being provided on said outer surface.
  • said friction area or areas comprise a two-dimensional undulation. These undulations can for instance be two-dimensional sinusoid, in an embodiment having an amplitude of about 1-5 micron and a wavelength of about 50-200 micron. This should be enough to provided a better grip or friction for an eyelid, but avoid irritation or build-up of dirt.
  • said contact lens has prismatic optics.
  • the invention further relates to a contact lens comprising a central optical zone and a radially outer zone surrounding the central optical zone, and a ramped ridge in the radially outer zone, wherein said ridge comprises at least one interruption for allowing tear moisture to flow away.
  • one of said at least one interruption is provided substantially at the middle of said ridge.
  • the invention further relates to a contact lens comprising a central optical zone and a radially outer zone surrounding the central optical zone, and at least two elevations in the outer zone at both sides of a mirror line of said contact lens.
  • Fig. 1 a first embodiment of a contact lens of the invention in an eye
  • fig. 2 a SEM picture of a machined friction area
  • fig. 3 an example of a sinusoid surface
  • fig. 4 a further embodiment of a contact lens of the invention in an eye
  • fig. 5 a further embodiment of a contact lens of the invention in an eye
  • fig. 6 another embodiment of a contact lens of the invention in an eye
  • fig. 7 a cross section of a contact lens of figure 1
  • fig. 8 an enlarged detail of figure 4
  • fig. 9 a cross section of fig. 4
  • fig. 10 a contact lens of the invention in side view and partial cross section
  • fig. 11 another contact lens of the invention in side view and partial cross section
  • fig. 12 a detail of an embodiment of figure 11
  • fig. 13 a detail of another embodiment of figure 11
  • fig. 14 a detail of another embodiment of figure 11;
  • Figure 1 shows a first embodiment of a contact lens 1 on an eye with upper eyelid 2 and lower eyelid 3.
  • Contact lens 1 has an optical zone with a central optical zone 4 and a presbyopia correcting further optical zone 5 radially outside the central optical zone.
  • contact lens 1 Around the further optical zone 5, contact lens 1 has a ramped ridge 6 which has several friction areas 7 on the ridge below the further optical zone 5.
  • Figure 2 shows an example of a friction area according to the invention, in which a SEM picture is shown of a friction area which has a sinusoid surface with an amplitude of at least 2.5 ⁇ m and a wavelength of about 70 ⁇ m in both the x- and y-directions.
  • the sinusoids in this embodiment have sub- ⁇ m form accuracy with a surface finish on the order of 100 nm.
  • These types of sinusoidal surfaces can be machined using a single point diamond tool with a commercial fast tool servo on a diamond turning machine. For example Machining could be performed with a Precitech Nanoform 200 or Contamac DiaTop diamond turning machine. In these types of machines, the work piece is mounted on the spindle of the machine tool and rotates clockwise.
  • a Fast Tool Servo system is mounted on the tool slide and is oriented so that its stroke is parallel to the z-axis, perpendicular to the face of the work piece.
  • a single point diamond cutting tool is mounted in the fast tool servo, and the height of the cutting edge is carefully set so that it cuts to the center of the work piece.
  • the machine spindle (the C- axis) rotates the work piece clockwise, and the motion of the x-axis moves the diamond tool relative to the work piece such that the tool travels from right to left relative to the work piece, from the outer edge toward the center of rotation.
  • the stroke of the fast tool servo is slaved to the C-axis and the x-axis, both of which contain high resolution encoders that constantly read the angular orientation of the machine spindle, ⁇ , and the distance of the diamond tool tip from the axis of rotation of the machine spindle, r.
  • the fast tool servo is programmed so that its stroke is a function of the encoder readings, ⁇ and r. and the tool path is three Dimensional (3D) corrected.
  • 3D Three Dimensional
  • the fast tool servo preferably is programmed to account for the finite nose radius of the cutting tool.
  • the size width and structure of the knurled surface could be varied for different locations. For instance at the bottom part less resistance and at a higher part (direction top of the lens) more resistance to have a controlled movement or stabilisation.
  • the structure could be in the shape of a so called Lotus texture. So it has a self cleaning micro texture to reduce deposits on the structured area.
  • Structure could be manufactured either on the lens or on a optical mould insert used for cast moulding or spin casting. • Structure could be manufactured by means of: o Single point diamond turning o Laser ablation o EDM (Electric Discharge Machining) o Micro sandblasting • Lens could be manufactured by means of: o Single point diamond cutting o Cast moulding or spin casting
  • the surface structure is not limited to a sinoid surface but could be of any type suitable to increase the slip-off resistance needed to help the lens translating or rotation stabilisation during the eye movement when the eye changes to downward gaze.
  • the lens could be a toric lens, toric multifocal, toric bifocal.
  • Fig. 4 shows a further embodiment of a contact lens 1 on an eye with upper eyelid 2 and lower eyelid 3.
  • Contact lens 1 has an optical zone with a central optical zone 4 and a presbyopia correcting further optical zone 5 radially outside the central optical zone.
  • contact lens 1 has a ramped ridge 6 which has several friction areas 7 on the ridge below the further optical zone 5.
  • This contact lens is further provided with two additional elevated areas 8 that preferably are dome-shaped and smoothly extend from the surface of the contact lens 1. These areas are situated on the upper half of the contact lens 1.
  • Fig. 5 shows another embodiment of a contact lens 1 according to the invention.
  • This contact lens 1 has two ridges 9, 9' at both sides of a mirror line through contact lens 1. These two ridges extend concentrically over a least part of the circumference of the contact lens, outside the optical zone. At the lower part where the ridges start, friction areas 10, 10' are provided. The space between the two ridges 9 allows eye fluid to leave the lens and not build up in the optical areas 4, 5. In cross section, the ridges 9, 9' preferably have a smooth, continuous slope.
  • Figure 6 shows another embodiment of a contact lens 1 with a fully circumferential ridge 11. On this ridge, several friction areas 12 are provided.
  • Figure 7 shown a cross section through the lens of figure 6.
  • the contact lens 1 has a concave inner surface 13 which during wearing floats on an the eye, and an outer surface 14.
  • the ridge 6 is indicated.
  • the contact lens is not prismatic: at the optical area side of the ridge, the ridge slopes downward and the contact lens has its normal thickness. In a prismatic lens, the thickness of the contact lens would from the top of the ridge would decrease slowly until the current thickness would be reached at the other side (where numeral 1 is placed) of the lens.
  • FIG 8 a detail of the ridge-part of figure 7 is shown.
  • This ridge 6 has a smooth, continuous contour and smoothly extends from the general outer surface 14 of the contact lens 1.
  • the friction area 7 in cross section, showing the wavelets which were here made in the surface of the ridge, at a location which is radially away from the optical zone.
  • the ridge With a so called soft contact lens which has a diameter larger then the iris of an eye, the ridge is not situated at the edge of the contact lens, but more radially towards the centre of the contact lens, as is shown in this fig. 8.
  • this figure shows that the amplitude of the micro undulations is very small, in the range of about 1-5 micron, and preferably 2-3 micron. Its wavelength is about 40-200 micron, preferably 60-80 micron.
  • the slope preferably is continuous in order to prevent dirt to build up and to avoid irritation of the eye.
  • Figure 9 shows a cross section of a contact lens 1 generally according to the contact lens of figure 5, which has an interruption 15 in the ridge 6 centrally below the central optical zone 4.
  • Figure 10 shows a contact lens according to the invention which has a ridge 6 and friction areas 16 having a two-dimensional sinusoid profile. A picture of such a profile is shown in figure 12.
  • Figure 11 shows a cross section through a contact lens 1 of figure 1 with a ridge 6.
  • Friction area 20 has a profile of substantially parallel waves which run perpendicular to the radial direction, substantially in circumferential direction.
  • Friction area 21 has a profile which is at an angle with respect to the radial direction and the circumferential direction. This placement allows the eyelid to properly position the lens both in radial position and in height on the eye.
  • FIGs 12-14 show various embodiments of a wave pattern according to the invention and used in figure 10.
  • the waves are substantially parallel waves. These waves are in figure 9 below the general surface and in a fully sinusoid pattern.
  • the waves are below the general surface of the contact lens, and between each wave 23 there is a flat region.
  • the waves 24 extend above the general surface 14 of the contact lens 1.

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 de contact qui comprend au moins une zone à frottement plus prononcé destiné à la paupière, ce qui permet à la paupière d'accrocher la lentille de contact pour la placer sur un oeil. Cette zone de frottement comprend des ondulations à micro-échelle assurant le frottement entre la paupière et la lentille de contact.
EP07768921A 2006-07-11 2007-07-10 Lentille de contact Withdrawn EP2038695A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07768921A EP2038695A1 (fr) 2006-07-11 2007-07-10 Lentille de contact

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US11/484,361 US20080013044A1 (en) 2006-07-11 2006-07-11 Contact lens
EP20060116967 EP1879064A1 (fr) 2006-07-11 2006-07-11 Lentille de contact
PCT/NL2007/050339 WO2008007955A1 (fr) 2006-07-11 2007-07-10 Lentille de contact
EP07768921A EP2038695A1 (fr) 2006-07-11 2007-07-10 Lentille de contact

Publications (1)

Publication Number Publication Date
EP2038695A1 true EP2038695A1 (fr) 2009-03-25

Family

ID=38529692

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07768921A Withdrawn EP2038695A1 (fr) 2006-07-11 2007-07-10 Lentille de contact

Country Status (2)

Country Link
EP (1) EP2038695A1 (fr)
WO (1) WO2008007955A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2002540C2 (en) * 2009-02-17 2010-08-18 Oculentis B V Ophthalmic lens with optical sectors.
US9823493B2 (en) 2012-08-30 2017-11-21 Johnson & Johnson Vision Care, Inc. Compliant dynamic translation zones for contact lenses
US9927633B2 (en) 2015-10-28 2018-03-27 Johnson & Johnson Vision Care, Inc. Friction stabilized contact lenses

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989007281A1 (fr) * 1988-02-01 1989-08-10 Steve Newman Lentille de contact a motif
DE69232796T2 (de) * 1991-06-17 2003-07-24 Dugmont Pty. Ltd., Springwood Torische kontaktlinse
ATE182693T1 (de) * 1995-10-31 1999-08-15 Procornea Holding Bv Multifokallinse und ihr herstellungsverfahren
US6626534B1 (en) * 2000-09-29 2003-09-30 Dimartino Robert B. Contact lens stabilization design system
US6921168B2 (en) * 2002-07-24 2005-07-26 Novartis Ag Translating contact lens having a ramped ridge

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008007955A1 *

Also Published As

Publication number Publication date
WO2008007955A9 (fr) 2009-04-16
WO2008007955A1 (fr) 2008-01-17

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