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
  • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
  • A61F2/02—Prostheses implantable into the body
  • A61F2/14—Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
  • A61F2/16—Intraocular lenses
  • A61F2/1613—Intraocular lenses having special lens configurations, e.g. multipart lenses; having particular optical properties, e.g. pseudo-accommodative lenses, lenses having aberration corrections, diffractive lenses, lenses for variably absorbing electromagnetic radiation, lenses having variable focus
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
  • A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
  • A61B3/16—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for measuring intraocular pressure, e.g. tonometers
• • 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
  • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
  • A61F2/02—Prostheses implantable into the body
  • A61F2/14—Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
  • A61F2/16—Intraocular lenses
• • 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
  • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
  • A61F2/02—Prostheses implantable into the body
  • A61F2/14—Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
  • A61F2/16—Intraocular lenses
  • A61F2/1613—Intraocular lenses having special lens configurations, e.g. multipart lenses; having particular optical properties, e.g. pseudo-accommodative lenses, lenses having aberration corrections, diffractive lenses, lenses for variably absorbing electromagnetic radiation, lenses having variable focus
  • A61F2/1659—Intraocular lenses having special lens configurations, e.g. multipart lenses; having particular optical properties, e.g. pseudo-accommodative lenses, lenses having aberration corrections, diffractive lenses, lenses for variably absorbing electromagnetic radiation, lenses having variable focus having variable absorption coefficient for electromagnetic radiation, e.g. photochromic lenses
• • 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
  • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
  • A61F2/02—Prostheses implantable into the body
  • A61F2/14—Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
  • A61F2/16—Intraocular lenses
  • A61F2002/16965—Lens includes ultraviolet absorber
• • 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
  • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
  • A61F2/02—Prostheses implantable into the body
  • A61F2/14—Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
  • A61F2/16—Intraocular lenses
  • A61F2002/16965—Lens includes ultraviolet absorber
  • A61F2002/1699—Additional features not otherwise provided for

Definitions

• the invention relates to a device according to the preamble of the main claim for optical representation of the intraocular pressure.
• Increased intraocular pressure is one of the major causes of glaucoma in pathogenesis, which can cause vision or visual field loss. Glaucoma blindness is estimated to be around 50,000 a year. Timely measurement of intraocular pressure and appropriate drug treatment and timely surgical therapy could, however, prevent disease.
• the patient with the help of a small, advantageously automated readout device can determine his intraocular pressure independently and without contact. It is therefore an object of the invention to provide an externally readable intraocular pressure sensor for reading by either the patient himself or with higher accuracy by pharmacies or medical staff.
• a purely visual measurement is performed using a special magnifying glass, in which the patient determines the color wheel size of the sensor.
• the method according to the invention for the optical representation of the intraocular pressure will work with a device which is preferably implanted on an intraocular lens in the eye and which has a membrane which bulges out when the intraocular pressure changes and a pressure surface.
• a device which is preferably implanted on an intraocular lens in the eye and which has a membrane which bulges out when the intraocular pressure changes and a pressure surface.
• the intraocular pressure is increased, in the region of contact of the membrane with the surface, e.g. change the polarization for a spectral range of incident and reflected light by a reversible chemical reaction or by other optical effects.
• a readout device for optically reproducing a two-dimensional image of the polarization-modified light reflected by the photonic crystal which has a polarization filter for the light reflected and that reflected by the photonic crystal, can be used for purely visual measurement with daylight and, for example, from a mirror exist, with which the patient directs light into the eye.
• a circular polarizing filter would then be provided which polarizes the incident and also the backscattered light. The observation of the eye would be done by the patient in the mirror, whereby he would recognize no or a small discolored area with normal intraocular pressure.
• this surface may also be formed curved. It is also conceivable to impress a plurality of contact points or rings on this surface in order to give the representation a gradual course.
• a reference scale provided with defined known geometrical dimensions will also be possible on the pressure surface, or an already existing bar code or ID number can be moved so close to the area of the contact between membrane and surface that, in particular, in the case of a camera and software Evaluation is the area of the reference scale in the image.
• an automated readout device it is proposed to work with defined illumination and to provide a camera as part of the readout device, whereby a storable image is generated.
• two longitudinally polarizing filters can be provided, wherein that in the Einstrahlstrahlengang and that for the reflected light are crossed by 90 °, for representing the area of the surface contact as a difference image.
• the captured camera image can then be processed with computer means based on a previously known reference variable contained in the image for the determination of a numerical value of the intraocular pressure from the size of the detected contact surface.
• the invention proposes that the nanostructured surface is located inside a reference pressure chamber, which is closed by a membrane, in the intraocular lens, whose internal pressure is dimensioned so that no or only minimal contact between membrane and surface arises at normal intraocular pressure.
• Fig. 1 is a schematic representation of an artificial lens with an integrated intraocular pressure sensor at the edge and
• FIG. 2 shows a measuring setup for reading the pressure value in the form of a larger or smaller visible area depending on the pressure.
• the intraocular pressure sensor consists of a movable membrane, a periodic nanostructured surface (photonic crystal) and a reference pressure chamber.
• the reference pressure is preset so that at the lowest intraocular pressure value the membrane just touches the photonic crystal surface. It is conceivable to provide a set of artificial lenses each provided with a different reference pressure for various possible intraocular pressures, so that a lens suitable for the respective patient can be used during the implantation.
• the membrane With an increase in pressure in the eye, the membrane is then pressed in a larger area to the photonic crystal.
• the reflection spectrum differs locally depending on whether the membrane is pressed against the photonic crystal or not, since the pressed membrane leads to a refractive index change on the surface of the photonic crystal.
• Fig. 2 shows a measurement setup for reading the pressure value in the form of a larger or smaller depending on the pressure visible surface.

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

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ID=48874735

Family Applications (1)

Country Status (5)

Cited By (1)

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Citations (6)

• 2012
  • 2012-06-13 DE DE201210105129 patent/DE102012105129A1/de not_active Ceased
• 2013
  • 2013-06-12 EP EP13741662.4A patent/EP2861126B1/de active Active
  • 2013-06-12 IN IN2968KON2014 patent/IN2014KN02968A/en unknown
  • 2013-06-12 WO PCT/DE2013/100214 patent/WO2013185757A1/de active Application Filing
  • 2013-06-12 US US14/406,827 patent/US9730788B2/en not_active Expired - Fee Related

Patent Citations (6)

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