NL2009770C2 - An ophthalmic marking unit, a method and a computer program product. - Google Patents

An ophthalmic marking unit, a method and a computer program product. Download PDF

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Publication number
NL2009770C2
NL2009770C2 NL2009770A NL2009770A NL2009770C2 NL 2009770 C2 NL2009770 C2 NL 2009770C2 NL 2009770 A NL2009770 A NL 2009770A NL 2009770 A NL2009770 A NL 2009770A NL 2009770 C2 NL2009770 C2 NL 2009770C2
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NL
Netherlands
Prior art keywords
electronic device
marking unit
portable electronic
cornea
angular orientation
Prior art date
Application number
NL2009770A
Other languages
Dutch (nl)
Inventor
Andreas Christoph Kühnel
Martin Charles
Original Assignee
Eye Technology Ltd
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 Eye Technology Ltd filed Critical Eye Technology Ltd
Priority to NL2009770A priority Critical patent/NL2009770C2/en
Priority to PCT/EP2013/073168 priority patent/WO2014072342A1/en
Application granted granted Critical
Publication of NL2009770C2 publication Critical patent/NL2009770C2/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/013—Instruments for compensation of ocular refraction ; Instruments for use in cornea removal, for reshaping or performing incisions in the cornea
    • A61F9/0136—Mechanical markers

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  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)

Abstract

The invention relates to an ophthalmic marking unit (1) for mapping an axis on the cornea for aligning an intraocular lens. The marking unit comprises an elongate element (2) having a distal end (3) for touching the cornea. The elongate element also has a proximal end (4) provided with a coupling module for rigidly coupling the elongate element to a portable electronic device (20). The portable electronic device is capable of determining an angular orientation by using an included accelerometer (7).

Description

P99478NL00
Title: An ophthalmic marking unit, a method and a computer program product
The invention relates to an ophthalmic marking unit for mapping an axis on the cornea for aligning an intraocular lens.
Such marking units are known, e.g. as a pendulum marker or a level instrument designed to mark a zero degrees orientation, to be used in 5 combination with a further angular orientation device such as a Méndez ring to actually determine a specific aligning axis.
Other marking units determine the specific aligning axis directly, e.g. by integrating a Méndez ring on a level instrument.
The ahgnment axis on the cornea is marked so that a toric 10 intraocular lens (IOL) can be placed correctly to compensate for a corneal astigmatism of a patient.
However, it appears that the accuracy of the known marking units is low. As an indication, the accuracy of a pendulum marker is typically in a range of 5° - 10°.
15 It is an object of the invention to provide an ophthalmic marking unit, wherein the above-mentioned disadvantage is reduced. In particular, the invention aims at obtaining an ophthalmic marking unit that has, during use, an improved accuracy. Thereto, according to an aspect of the invention, the marking unit comprises an elongate element having a distal 20 end for touching the cornea and a proximal end attached to a coupling module for rigidly coupling the elongate element to a portable electronic device capable of determining an angular orientation.
By applying the functionality of a portable electronic device of determining an angular orientation, a very convenient marking unit is 25 obtained that is potentially very accurate since the desired angle can be preselected and the determination of the angle can be performed automatically. Then, the user of the marking unit may concentrate on the other operations 2 such as turning the marker around the pupil, and performing the actual marking process on the cornea, thereby improving accuracy, reliability and risk of errors.
The invention also relates to a method for mapping an axis on the 5 cornea for aligning an intraocular lens.
Further, the invention relates to a computer program product. A computer program product may comprise a set of computer executable instructions stored on a data carrier, such as a flash memory, a CD or a DVD. The set of computer executable instructions, which allow a 10 programmable computer to carry out the method as defined above, may also be available for downloading from a remote server, for example via the Internet, e.g. as an app.
Other advantageous embodiments according to the invention are described in the following claims.
15 By way of example only, embodiments of the present invention will now be described with reference to the accompanying figures in which
Fig. 1 shows a schematic perspective view of an ophthalmic marking unit according to the invention;
Fig. 2 shows a schematic view of a distal end of the marking unit 20 shown in Fig. 1, and
Fig. 3 shows a flow chart of an embodiment of a method according to the invention.
The figures are merely schematic views of a preferred embodiment according to the invention. In the figures, the same reference 25 numbers refer to equal or corresponding parts.
Figure 1 shows a schematic perspective view of an ophthalmic marking unit 1 according to the invention. The marking unit 1 comprises a curved elongate element 2 with a distal end 3 and a proximal end 4. The distal end 3 is intended for touching the cornea of the eye for mapping a 30 placement axis A of a toric intraocular lens (IOL) for aligning the IOL in the 3 eye. The marking unit 1 also comprises a coupling element to which the distal end 4 of the elongate element 2 is attached. The coupling element includes a sleeve 5 clamping a portable electronic device 20 such as a mobile phone, a smart phone or a tablet. Optionally, the proximal end 4 of the 5 elongate element 2 is detachably attached to the coupling module 5. Then, the elongate element 2 can be sterilized for repeated use.
The portable electronic device 20 includes a display 6, an accelerometer 7 and a processor 8. By using the accelerometer 7, the processor 8 of the device 6 is able to determine an angular orientation, e.g.
10 in a vertical plane.
In the shown embodiment, the distal end 3 of the elongate element 2 includes two tips 9, 10 to contact the cornea at mutual opposite positions PI, P2 with respect to the pupil.
Figure 2 shows a schematic view of the distal end 3 of the 15 marking unit 1, including the two tips 9, 10 placed at opposite positions PI, P2 with respect to the pupil 11, on the cornea 12. During use of the marking unit 1, the tips 9, 10 are provided with marking ink to mark the cornea 12.
In applying the marking unit 1, the distal end 3 of the marking unit 1 is located near the cornea 12. Then, the angle of the elongate element 20 2 is modified with respect to the pupil 11. In this process, the tips 9, 10 turn around the pupil 11 until the portable electronic device 20 determines that a pre-determined angular orientation of the elongate element 2 with respect to the pupil 11 orientation has been reached.
The portable electronic device 20 may provide a signal indicating 25 an actual angular orientation of the elongate element 2, e.g. by displaying the angle in a digital format and/or by controlling a synthesized speaker.
In a preferred embodiment, the pre-determined angular orientation is input in a digital manner in the portable electronic device 20 as a pre-selected angle, before locating the distal end 3 of the marking unit 1 30 adjacent to the cornea 12. Then, upon reaching a range of the pre-selected 4 angular orientation, the portable electronic device 6 activates a detection signal, e.g. an audible and/or visible signals such as beeps and/or colours on the display 6 of the device 20.
Optionally, a parameter of the detection signal depends on the 5 offset between the actual determined angular orientation and the preselected angular orientation, so that the user of the marking unit 1 is guided to the pre-selected angular orientation.
When, the correct pre-determined angular orientation has been determined by the device 20, the cornea 12 is marked by touching the cornea 10 12 with the tips 9, 10.
Figure 6 shows a flow chart of an embodiment of the method according to the invention. The method is used for mapping an axis on the cornea for aligning an intraocular lens. The method comprises a step of providing 110 a portable electronic device capable of determining an angular 15 orientation, a step of providing 120 a marking unit including an elongate element having a distal end and a proximal end, the proximal end being rigidly coupled to the portable electronic device, a step of locating 130 the distal end of the marking unit adjacent to the cornea, and a step of modifying 140 the angle of the elongate element until a pre-determined 20 angular orientation is determined by the portable electronic device.
The method for mapping an axis on the cornea for aligning an intraocular lens can be performed using, in the portable electronic device, dedicated hardware structures, such as FPGA and/or ASIC components. Otherwise, the method can also at least partially be performed using a 25 computer program product comprising instructions for causing a processor in the portable electronic device to perform the process of determining the pre-determined angular orientation. Said process, and optionally any substeps, can in principle be performed on a single processor. However, it is noted that at least one (sub)step can be performed on a separate processor.
5 A processor can be loaded with a specific software module. Dedicated software modules can be provided, e.g. from the Internet.
The invention is not restricted to the embodiments described herein. It will be understood that many variants are possible.
5 As an example, the coupling module for rigidly coupling the elongate element to the portable electronic device can be implemented as a sleeve as described above. However, other implementations of the coupling module are also possible, e.g. using a screwing connection.
Further, the portable electronic device can also be used for 10 making a picture during subsequent steps in the above-mentioned processes, e.g. for documentation.
Other such variants will be apparent for the person skilled in the art and are considered to fall within the scope of the invention as defined in the following claims.
15

Claims (16)

1. Oogheelkundige markeringseenheid voor het afbeelden van een as op de cornea ter uitlijning van een intraoculaire lens, waarbij de markeringseenheid een langwerpig element omvat met een distaai uiteinde om de cornea aan te raken, en een proximaal uiteinde dat is bevestigd aan 5 een koppelingsmodule om het langwerpige element stijf te koppelen aan een draagbaar elektronisch apparaat ter bepaling van een hoekoriëntatie.An ophthalmic marking unit for imaging an axis on the cornea for aligning an intraocular lens, the marking unit comprising an elongate element with a distal end to touch the cornea, and a proximal end attached to a coupling module around rigidly coupling the elongate element to a portable electronic device for determining an angular orientation. 2. Oogheelkundige markeringseenheid volgens conclusie 1, waarbij het draagbare elektronische apparaat een mobiele telefoon, een smartphone of een tablet is.Ophthalmic marking unit according to claim 1, wherein the portable electronic device is a mobile phone, a smartphone or a tablet. 3. Oogheelkundige markeringseenheid volgens conclusie 1 of 2, waarbij de koppelmodule een hoes omvat die het mobiele elektronische apparaat omklemt.Ophthalmic marking unit according to claim 1 or 2, wherein the coupling module comprises a cover that encloses the mobile electronic device. 4. Oogheelkundige markeringseenheid volgens één van de voorgaande conclusies, waarbij het distale uiteinde twee uitsteeksels omvat 15 om in aanraking te komen met de cornea op onderling tegengestelde posities ten opzichte van de pupil.4. Ophthalmic marking unit according to any one of the preceding claims, wherein the distal end comprises two protrusions for coming into contact with the cornea at mutually opposite positions with respect to the pupil. 5. Oogheelkundige markeringseenheid volgens conclusie 4, waarbij de uitsteeksels zijn voorzien van een markeringsinkt.Ophthalmic marking unit according to claim 4, wherein the protrusions are provided with a marking ink. 6. Oogheelkundige markeringseenheid volgens één van de 20 voorgaande conclusies, waarbij het langwerpige element gebogen is.An ophthalmic marking unit according to any one of the preceding claims, wherein the elongate element is bent. 7. Oogheelkundige markeringseenheid volgens één van de voorgaande conclusies, waarbij het proximale uiteinde van het langwerpige element losneembaar is bevestigd aan de koppelmodule.An ophthalmic marking unit according to any one of the preceding claims, wherein the proximal end of the elongate element is releasably attached to the coupling module. 8. Draagbaar elektronisch apparaat, omvattende een oogheelkundige 25 markeringseenheid volgens één van de conclusies 1-7, waarbij het apparaat in staat is een hoekoriëntatie te bepalen.8. A portable electronic device comprising an ophthalmic marking unit according to any of claims 1-7, wherein the device is capable of determining an angular orientation. 9. Draagbaar elektronisch apparaat volgens conclusie 8, omvattende een versnellingsmeter.A portable electronic device according to claim 8, comprising an accelerometer. 10. Draagbaar elektronisch apparaat volgens conclusie 8 of 9, dat in staat is een hoekoriëntatie in een vertikaal vlak te bepalen.A portable electronic device according to claim 8 or 9, which is capable of determining an angular orientation in a vertical plane. 11. Werkwijze voor het afbeelden van een as op een cornea ter uithjning van een intraoculaire lens, waarbij de werkwijze de stappen omvat van: - het voorzien van een draagbaar elektronisch apparaat dat in staat is een hoekoriëntatie te bepalen, 10. het voorzien van een markingseenheid dat een langwerpig element omvat met een distaai uiteinden en een proximaal uiteinde, waarbij het proximale uiteinde stijf gekoppeld is aan het draagbare elektronische apparaat, - het lokaliseren van het distale uiteinde van de markeringseenheid nabij de cornea, en 15. het wijzigen van de hoek van het langwerpige element totdat een vooraf bepaalde hoekoriëntatie is bepaald door het draagbare elektronische apparaat.11. A method of imaging an axis on a cornea for projecting an intraocular lens, the method comprising the steps of: - providing a portable electronic device capable of determining an angular orientation; marking unit comprising an elongate element with a distal ends and a proximal end, the proximal end being rigidly coupled to the portable electronic device, - locating the distal end of the marking unit near the cornea, and 15. changing the angle of the elongate element until a predetermined angular orientation is determined by the portable electronic device. 12. Werkwijze volgens conclusie 11, voorts omvattende de stappen van: - het vooraf selecteren van de vooraf bepaalde hoekoriëntatie in het 20 draagbare elektronische apparaat vóór het lokaliseren van het distale uiteinde van de markeringseenheid nabij de cornea, en - het activeren van een detectiesignaal, via het draagbare elektronische apparaat, wanneer een actuele bepaalde hoekoriëntatie zich binnen een bereik van de vooraf geselecteerde hoekoriëntatie bevindt.12. Method as claimed in claim 11, further comprising the steps of: - preselecting the predetermined angular orientation in the portable electronic device before locating the distal end of the marking unit near the cornea, and - activating a detection signal, via the portable electronic device, when an actual determined angular orientation is within a range of the preselected angular orientation. 13. Werkwijze volgens conclusie 12, waarbij het detectiesignaal hoorbaar en/of zichtbaar is.The method of claim 12, wherein the detection signal is audible and / or visible. 14. Werkwijze volgens conclusie 12 of 13, waarbij een parameter van het detectiesignaal afhankelijk is van het verschil tussen de actueel bepaalde hoekoriëntatie en de vooraf geselecteerde hoekoriëntatie.A method according to claim 12 or 13, wherein a parameter of the detection signal is dependent on the difference between the currently determined angle orientation and the preselected angle orientation. 15. Werkwijze volgens één van de conclusies 11-14, voorts omvattende de stap van het markeren van de cornea met het distale uiteinde van het langwerpige element wanneer de vooraf bepaalde hoekoriëntatie wordt bepaald door het draagbare elektronische apparaat.The method of any one of claims 11-14, further comprising the step of marking the cornea with the distal end of the elongate member when the predetermined angular orientation is determined by the portable electronic device. 16. Computerprogrammaproduct voor het afbeelden van een as op de cornea ter uitlijning van een intraoculaire lens, waarbij het computerprogrammaproduct voor een computer leesbare code omvat dat een processor in een draagbaar elektronisch apparaat de stap doet uitvoeren van het bepalen of een vooraf bepaalde hoekoriëntatie van een langwerpig 10 element is bereikt, waarbij het langwerpige element deel uitmaakt van een markeringseenheid en een distaai uiteinden en een proximaal uiteinde heeft, waarbij het proximale uiteinde stijf is gekoppeld met het draagbare elektronische apparaat, waarbij het distale uiteinde van de markeringseenheid nabij de cornea is gelokaliseerd, end e hoek van het 15 langwerpige element wordt gewijzigd totdat de vooraf bepaalde hoekoriëntatie wordt bepaald door de processor van het draagbare elektronische apparaat.A computer program product for imaging an axis on the cornea for aligning an intraocular lens, the computer program product comprising computer readable code causing a processor in a portable electronic device to perform the step of determining whether a predetermined angular orientation of a elongated element is reached, the elongated element being part of a marking unit and having a distal end and a proximal end, the proximal end being rigidly coupled to the portable electronic device, the distal end of the marking unit being located near the cornea The angle of the elongated element is changed until the predetermined angle orientation is determined by the processor of the portable electronic device.
NL2009770A 2012-11-07 2012-11-07 An ophthalmic marking unit, a method and a computer program product. NL2009770C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL2009770A NL2009770C2 (en) 2012-11-07 2012-11-07 An ophthalmic marking unit, a method and a computer program product.
PCT/EP2013/073168 WO2014072342A1 (en) 2012-11-07 2013-11-06 An ophthalmic marking unit, a method and a computer program product

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2009770A NL2009770C2 (en) 2012-11-07 2012-11-07 An ophthalmic marking unit, a method and a computer program product.
NL2009770 2012-11-07

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150366714A1 (en) * 2014-06-24 2015-12-24 Oasis Medical, Inc. Electronic eye marking device
US9962077B2 (en) 2014-07-01 2018-05-08 Amo Wavefront Sciences, Llc System and method for corneal topography with flat panel display
EP3164056B1 (en) * 2014-07-01 2021-12-01 AMO Development, LLC System and method for corneal topography with flat panel display
ES2678271B2 (en) * 2018-05-31 2018-12-04 Salvador NEBRO COBO Eye Goniometer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002094144A1 (en) * 2001-05-18 2002-11-28 Georg Gerten Marking instrument
DE202010012367U1 (en) * 2010-01-27 2010-11-18 Geuder Ag Device for applying a marking to the human eye
US20110251630A1 (en) * 2010-04-08 2011-10-13 Richardson Gary A Corneal marking apparatus
WO2012050622A2 (en) * 2010-10-15 2012-04-19 Tracey Technologies, Corp Tools and methods for the surgical placement of intraocular implants

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002094144A1 (en) * 2001-05-18 2002-11-28 Georg Gerten Marking instrument
DE202010012367U1 (en) * 2010-01-27 2010-11-18 Geuder Ag Device for applying a marking to the human eye
US20110251630A1 (en) * 2010-04-08 2011-10-13 Richardson Gary A Corneal marking apparatus
WO2012050622A2 (en) * 2010-10-15 2012-04-19 Tracey Technologies, Corp Tools and methods for the surgical placement of intraocular implants

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