USRE37071E1 - Marked contact lens bearing optical marking element - Google Patents
Marked contact lens bearing optical marking element Download PDFInfo
- Publication number
- USRE37071E1 USRE37071E1 US09/495,503 US49550300A USRE37071E US RE37071 E1 USRE37071 E1 US RE37071E1 US 49550300 A US49550300 A US 49550300A US RE37071 E USRE37071 E US RE37071E
- Authority
- US
- United States
- Prior art keywords
- contact lens
- optical marking
- microlens optical
- microlens
- marking element
- 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.)
- Expired - Lifetime
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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
- G02C7/049—Contact lenses having special fitting or structural features achieved by special materials or material structures
-
- 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
- G02C7/021—Lenses; Lens systems ; Methods of designing lenses with pattern for identification or with cosmetic or therapeutic effects
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C2202/00—Generic optical aspects applicable to one or more of the subgroups of G02C7/00
- G02C2202/16—Laminated or compound lenses
Definitions
- the present invention relates to a marked lens, and more particularly to a marked contact lens and a method of making same.
- Another method is to engrave or impart a mark on a lens producing an opaque surface.
- this surface is necessarily rough and may be felt by the wearer, thus producing discomfort.
- the engraved mark may also attract and retain proteinaceous and other types of deposits creating propitious conditions for an infection.
- Another method of marking contact lenses is to mark them using a laser.
- this method cannot be employed for wet molded soft contact lenses. It is also time-consuming and expensive.
- the identification method using optical elements is not restricted to lenses. Even if the invention is applicable to all kinds of lenses, including dry or wet lenses as well as soft or rigid lenses, the present method may also be used for marking any other kind of transparent or semi-transparent material that needs to be marked.
- the main object of the present invention is to provide an easy information to the lens user concerning the right surface orientation of the lens, before the lens is applied on the eye's surface.
- Inversion identification is applicable to soft lenses, where the concave side is frequently inverted outwardly into a convex shape in which state the lens is not suitable to be worn.
- a state of the lens is not clearly visible to the observer and oftentimes people may incorrectly wear their lenses.
- the present invention uses microstructure surface variations, such as dot or cylindrical microlenses, having the form of concave or convex semi-spheres or semi-cylinders (the cross-section may also be elliptical or aspheric), which are applied on the surface of the contact lens in order to provide identification and orientation marks for allowing the user to wear the lenses in the adequate position.
- the surface variations are small and their surface is smooth and highly polished therefore these microlenses do not attract and do not retain proteinaceous and other deposits.
- these microlenses are not felt by the wearer's eyelid.
- the dimensions of the microlenses are chosen so as to avoid any irritation when worn by the user. However, when removed and held up toward a light source, they permit to the user to clearly see them, thus providing information on the right position they have to be worn in.
- such optical elements are used to form letters or other distinctive signs at specific locations on the contact lens surface and these letters or signs provide position information to the user.
- the optical elements may be located on a single side of the lenses or on both sides of the lenses. In the latter case, the optical elements may be even smaller in depth or height if they are applied in conjunction to one another, one on each face of the lens, thus superposing the optical effect seen by the human eye when looking to the lens toward a light source.
- a marked contact lens comprising at least one microlens optical marking element integrally formed on a surface of the contact lens in a peripheral area thereof.
- the invention also provides a method of manufacturing a marked contact lens comprising the steps of: forming at least one microformation in a contact lens manufacturing mold for integrally forming a microlens optical marking element; and molding a lens in the mold to obtain the marked contact lens.
- the invention further provides a marked lens comprising at least one microlens optical marking element integrally formed on a surface of the lens in a non-image forming area thereof.
- FIGS. 1a to 1 f illustrate prior art techniques of marking contact lenses
- FIG. 1a is a front view of a sphero-cylindrical contact lens having orientation marks indicating the prism ballast on the lens for holding the lens in a particular position
- FIG. 1b is a front view of a contact lens having printed or engraved marks
- FIGS. 1c, 1 d, 1 e and 1 f are a plan and a side view of a non-inverted and an inverted contact lens respectively having AL/JA inversion marks;
- FIG. 2 respectively illustrates the prior art principal of a semi-cylindrical lens which forms a straight line image when a person looks through it at a light source;
- FIGS. 3a and 3b illustrate microlens optical elements which are used in the preferred embodiment to mark the contact lens, specifically, FIG. 3a shows a number of semi-spherical optical elements used for creating the two letters AL on the lens surface, while FIG. 3b shows semi-cylindrical elements used to form the same two letters on the lens surface; and
- FIG. 4 is a FIGS. 4a and 4b are partial sectional view views of the contact lens according to the preferred embodiment of the present invention wherein dual optical elements are used to create an optical mark on both lens surfaces. surfaces, specifically, FIG. 4a shows a concave depression, while FIG. 4b shows a convex protrusion.
- optical elements are used to mark lenses. These marks are used to provide lens position information to the lens user, so lenses may be worn in the right position.
- FIG. 1 shows printed and engraved marks used in the prior art in order to provide position information to the lens wearer.
- semi-spherical or semi-cylindrical optical elements are provided on the surface of the contact lens for providing lens position information to the lens user.
- An important characteristic of such marks is that they are not felt or seen by the wearer while the lenses are worn. They are, however, clearly visible when the lens is examined visually, especially when held toward a light source.
- a semi-cylindrical optical element 20 is shown in FIG. 2; the cylindrical element 20 is seen as a straight line 22 when a user 24 looks through it at a light source 26 .
- the optical marks on the contact lenses are composed by a plurality of microlens optical elements which are imparted on the surface of the contact lens.
- Each of these optical elements 20 acts as either a spherical lens 21 or a cylindrical lens 20 (or a combination of them) applied on the contact lens 10 .
- FIG. 3 illustrates some optical marks 28 having the form of two letters AL and which are composed of spherical elements 21 (FIG. 3a) and cylindrical elements 20 ′ (FIG. 3 b).
- the mark would appear to the viewer as a bright or dark point (depending on the focal length of the optical element and the distance at which the lens is held by the viewer) on the contact lens when the lens is held in front of a light source.
- the mark appears as a bright or dark line, as shown in FIG. 2 .
- the mark “AL” composed of cylindrical elements is provided on a contact lens.
- a contact lens 10 in the right way, i.e. the concave surface 30 of the lens toward the eye, the user sees the letters “AL” and he knows this is the right orientation the lens is supposed to have. If the lens has its inside part 30 facing outwardly (i.e. it is inverted and its outer surface 32 is now toward the eye) then the user sees the letters “JA”, as better shown in FIGS. 1d and 1f, and knows that this is the wrong orientation of the lens, so he may invert it before applying it onto the eye.
- the size of the optical marks are of the order of 2 mm in length and are located at the periphery of the contact lens. Other sizes of marks as well as other locations may be suitable as well, as long as they do not interfere with the wearer's vision and are not visible to others when worn by the wearer.
- the saggittal depth or the height of the optical elements 20 and 21 is preferably not more than 1.5 microns so the lens wearer cannot feel them.
- the following table shows approximate dimensions of the optical elements in the preferred embodiments. These dimensions are provided as an example only and are not limited to the values provided.
- the depth or height of optical elements 20 and 21 are substantially reduced even further if the elements are applied in conjunction with one another, one on each side of the contact lens, as shown in FIG. 4 .
- Concave or convex elements of smaller depth or height may be used for generating an optical mark having the same visibility as a mark of greater height or depth applied on a single side of a lens.
- All optical elements disclosed in the present application have a smooth surface and have no abrupt sides so the surface transition from the optical element to the contact lens is smooth and does not comprise any edges irritating to the user's eyelid. This feature is an improvement over the prior art because it does not retain impurities, it is not felt by the wearer, and it is not visible for an observer when worn on the eye, while remaining clearly visible when removed and examined visually by the user.
- the method of imparting the optical elements 20 and 21 onto the contact lens 10 for creating optical marks 28 is to incorporate the mark 28 into the optical molds used to mold the contact lenses so that no other step is added to the lens manufacturing process.
- the molds may be micro-machined or precision etched to achieve the precise desired shape of the microlens optical marking elements.
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- 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
Description
TABLE |
Saggital Height/Depth of Sphero-Cylindrical Elements |
Dioptric Pow- | Width of Sphero-Cylindrical Elements |
er of Element | W = 0.20 mm | W = 0.30 mm | W = 0.40 mm |
+/− 5.00 D | H/D = 0.00061 | H/D = 0.00138 | H/D = 0.00245 |
mm | mm | mm | |
+/− 10.00 D | H/D = 0.00067 | H/D = 0.00151 | H/D = 0.00268 |
mm | mm | mm | |
+/− 15.00 D | H/D = 0.00073 | H/D = 0.00164 | H/D = 0.00292 |
mm | mm | mm | |
Claims (68)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/495,503 USRE37071E1 (en) | 1997-12-22 | 2000-01-31 | Marked contact lens bearing optical marking element |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/995,366 US5936704A (en) | 1997-12-22 | 1997-12-22 | Marked contact lens bearing optical marking element |
US09/495,503 USRE37071E1 (en) | 1997-12-22 | 2000-01-31 | Marked contact lens bearing optical marking element |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/995,366 Reissue US5936704A (en) | 1997-12-22 | 1997-12-22 | Marked contact lens bearing optical marking element |
Publications (1)
Publication Number | Publication Date |
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USRE37071E1 true USRE37071E1 (en) | 2001-02-27 |
Family
ID=25541699
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/995,366 Ceased US5936704A (en) | 1997-12-22 | 1997-12-22 | Marked contact lens bearing optical marking element |
US09/495,503 Expired - Lifetime USRE37071E1 (en) | 1997-12-22 | 2000-01-31 | Marked contact lens bearing optical marking element |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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US08/995,366 Ceased US5936704A (en) | 1997-12-22 | 1997-12-22 | Marked contact lens bearing optical marking element |
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US (2) | US5936704A (en) |
Cited By (24)
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US20030214139A1 (en) * | 2000-09-12 | 2003-11-20 | Alok Nigam | System for packaging and handling an implant and method of use |
US20050113844A1 (en) * | 2000-09-12 | 2005-05-26 | Alok Nigam | System for packaging and handling an implant and method of use |
US20050246015A1 (en) * | 2004-04-30 | 2005-11-03 | Troy Miller | Aspherical corneal implant |
US20070255401A1 (en) * | 2006-05-01 | 2007-11-01 | Revision Optics, Inc. | Design of Inlays With Intrinsic Diopter Power |
US20080243138A1 (en) * | 2007-03-28 | 2008-10-02 | Jon Dishler | Insertion system for corneal implants |
US20080262610A1 (en) * | 2007-04-20 | 2008-10-23 | Alan Lang | Biomechanical design of intracorneal inlays |
US20090059166A1 (en) * | 2007-08-31 | 2009-03-05 | Menicon Co., Ltd. | Contact lens and method of manufacturing the same |
US20090198325A1 (en) * | 2007-04-20 | 2009-08-06 | Keith Holliday | Corneal Inlay Design and Methods of Correcting Vision |
US20110025979A1 (en) * | 2009-07-31 | 2011-02-03 | Khaled Chehab | Custom contact lenses with fiducial markings |
US20110118836A1 (en) * | 2009-11-18 | 2011-05-19 | Abbott Medical Optics Inc. | Mark for intraocular lenses |
US20110170055A1 (en) * | 2010-01-08 | 2011-07-14 | Benjamin David Enerson | Contact lens with visual indicator |
US20110218623A1 (en) * | 2004-04-30 | 2011-09-08 | Jon Dishler | Small Diameter Inlays |
US8057541B2 (en) | 2006-02-24 | 2011-11-15 | Revision Optics, Inc. | Method of using small diameter intracorneal inlays to treat visual impairment |
US8469948B2 (en) | 2010-08-23 | 2013-06-25 | Revision Optics, Inc. | Methods and devices for forming corneal channels |
US8668735B2 (en) | 2000-09-12 | 2014-03-11 | Revision Optics, Inc. | Corneal implant storage and delivery devices |
US20140119617A1 (en) * | 2012-10-26 | 2014-05-01 | Oberthur Technologies | Biometric identification |
US9140907B2 (en) | 2012-02-16 | 2015-09-22 | Vision Discoveries, Llc | Contact lens |
US9271828B2 (en) | 2007-03-28 | 2016-03-01 | Revision Optics, Inc. | Corneal implant retaining devices and methods of use |
US9345569B2 (en) | 2011-10-21 | 2016-05-24 | Revision Optics, Inc. | Corneal implant storage and delivery devices |
US9539143B2 (en) | 2008-04-04 | 2017-01-10 | Revision Optics, Inc. | Methods of correcting vision |
US9549848B2 (en) | 2007-03-28 | 2017-01-24 | Revision Optics, Inc. | Corneal implant inserters and methods of use |
US10555805B2 (en) | 2006-02-24 | 2020-02-11 | Rvo 2.0, Inc. | Anterior corneal shapes and methods of providing the shapes |
US10583041B2 (en) | 2015-03-12 | 2020-03-10 | RVO 2.0 Inc. | Methods of correcting vision |
US10835371B2 (en) | 2004-04-30 | 2020-11-17 | Rvo 2.0, Inc. | Small diameter corneal inlay methods |
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US6203156B1 (en) | 1998-03-31 | 2001-03-20 | Johnson & Johnson Vision Care, Inc. | Contact lenses bearing marks |
US6488375B2 (en) | 1999-10-28 | 2002-12-03 | Ocular Sciences, Inc. | Tinted contact lens and method for making same |
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US20010006718A1 (en) * | 1999-12-22 | 2001-07-05 | Darr Gerhard Jorgen | Markings on transparent plastic |
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1997
- 1997-12-22 US US08/995,366 patent/US5936704A/en not_active Ceased
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2000
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