WO2020208403A1 - Système ophtalmique pour corriger des défauts de la vue - Google Patents

Système ophtalmique pour corriger des défauts de la vue Download PDF

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Publication number
WO2020208403A1
WO2020208403A1 PCT/IB2019/052994 IB2019052994W WO2020208403A1 WO 2020208403 A1 WO2020208403 A1 WO 2020208403A1 IB 2019052994 W IB2019052994 W IB 2019052994W WO 2020208403 A1 WO2020208403 A1 WO 2020208403A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens
ophthalmic system
eye
light
polarized
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.)
Ceased
Application number
PCT/IB2019/052994
Other languages
English (en)
Inventor
Sandro GROPPI
Emilio PAVANELLI
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.)
Medesa Srl
Original Assignee
Medesa Srl
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 Medesa Srl filed Critical Medesa Srl
Priority to PCT/IB2019/052994 priority Critical patent/WO2020208403A1/fr
Publication of WO2020208403A1 publication Critical patent/WO2020208403A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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 or corneal implants; 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
    • 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
    • G02C7/12—Polarisers
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/16—Shades; shields; Obturators, e.g. with pinhole, with slot

Definitions

  • the present invention relates to an ophthalmic system intended for correcting sight defects of the human eye.
  • the light rays incident on the cornea are projected onto the retina in an orderly manner through the dioptric system of the eye.
  • the retina transforms the light rays into electric pulses that are transmitted to the brain through the optic nerve. If there are defects in the cornea, these light rays are irregularly deflected and cause an incorrect formation of the image by the retina with a resulting reduction in the quality of the subject’s vision.
  • an intraocular lens measuring a few millimetres in diameter which incorporates a donut-shaped light-proof mask with a small central hole of just over a millimeter through which the light passes.
  • the small central hole constitutes a pinhole and its effect is to limit the angles from which the rays that contribute to form the image arrive, allowing only the direct rays to concentrate in the most sensitive part of the retina, called fovea, consequently improving eyesight, for example in the case of myopia, presbyopia, astigmatism, and comeal defects.
  • the implantable devices have some drawbacks.
  • the light-proof mask prevents the surgeon from seeing the bottom of the eye and forces him to resort to special equipment to have intraocular vision and thus to intervene on the eye.
  • the object of the present invention is to overcome the aforementioned drawbacks.
  • fig.1 is a schematic view of an ophthalmic system according to the invention in an operating position
  • fig.2 is a schematic view of the ophthalmic system of fig. 1 in another operating position;
  • figs 3,4,5 show the operating principle of the ophthalmic system of fig.1 ;
  • fig.6 is a schematic view of another ophthalmic system according to the invention. DETAILED DESCRIPTION OF THE INVENTION
  • the ophthalmic system of figs 1,2 provides an intraocular implantable lens Li and an external lens L2 aligned with the lens Li.
  • the lens Li is circular and suitable for being implanted in a human eye EB.
  • This lens Li is a polarized lens with a small non-polarized central circular part H, i.e. transparent to light. To achieve this, this central part H is not polarized in the polarization treatment of the lens Li; alternatively, to make the central part H, a through hole can be made in the lens Li.
  • the non-polarized central part H is suitable to perform the function of a pinhole, as will be explained below.
  • the central circular part H preferably has a diameter between 1mm and 2mm.
  • the lens Li is further equipped with appendices A which keep the lens Li in position inside the eye EB .
  • the lens L2 is also polarized.
  • This lens L2 can be circular and mounted in a rotary manner on a support S, indicated in the figures in dashed line, so as to have its optical axis lying substantially on the same optical axis as the lens Li; this common optical axis is indicated in the figures with X.
  • the support S can be part of the frame of a pair of glasses.
  • the lens L2 can for example be rotated on the support S through a ring not shown.
  • the mode of operation of the lenses Li and L2 seen above is described below with reference to figs 3-5.
  • the lenses Li and L2 are schematically depicted as two polarized rectangular plates and the non-polarized part H of the lens Li is not illustrated.
  • the polarization axis of the lens Li is indicated with Yi and the polarization axis of the lens L2 is indicated with Y2.
  • Fig.3 illustrates the geometric condition in which the angle a between the two polarization axes Yi and Y2 is equal to 0°.
  • the light passes through the two lenses Li and L2 with a slight attenuation due to the intrinsic light absorption of the two lenses Li and L2.
  • Fig.4 illustrates the geometric condition in which the angle a between the two polarization axes Yi and Y2 is between 0° and 90°.
  • the light that passes through the two lenses Li and L2 undergoes a greater attenuation which increases as the angle a increases.
  • Fig.5 illustrates the geometric condition in which the angle a between the two polarization axes Yi and Y2 is equal to 90°. In this case the light attenuation is maximum because the light is completely absorbed by the two lenses Li and L2.
  • Fig.l refers to the geometric condition of fig.5 with total light attenuation.
  • the non-polarized central portion H performs the function of pinhole.
  • Fig.2 refers instead to the geometric condition of fig. 4 with partial attenuation of the light.
  • an external contact lens L IE is used in the ophthalmic system, with polarization absent in a small central part H as provided for the lens Li.
  • the operating principle of this solution is exactly the one seen above with progressive light attenuation.
  • the lenses Li and L IE can be provided with dioptric power or not.
  • the lens L2 can also be provided with dioptric power or not.
  • the ophthalmic system disclosed and illustrated in the two embodiments has several advantages.
  • the lens Li is permeable to light and allows the surgeon to see the bottom of the eye without resorting to special equipment.
  • the surgery is so simple and of a shorter duration.
  • the patient’s visual field is not absolutely limited by the lens with pinhole.
  • the patient can adjust the light passing through the polarized part of the intraocular lens Li or of the contact lens L IE so as to widen the visual field and not limit it to the pinhole.
  • the patient can also remove the lens L2 always with the aim of widening the visual field.
  • the materials with which to make the lenses must obviously be suitable for the function and the location of the lenses, and be suitable for polarization treatment.
  • the ophthalmic system seen can be applied to one or both the eyes of a patient.
  • the lens with the central hole transparent to the light is integrated to the human eye, i.e. is inserted into the eye or applied to the eye, and the other lens is mounted externally to the eye in an optical coupling with the first lens.
  • the shape of the lenses can be different from the shape illustrated.
  • the support of the rotatable external lens can be of any type, also monocular, and not necessarily a frame of glasses.
  • the polarized lens mounted externally to the eye can also be a non-rotatable lens, i.e. a fixed lens can be used.

Landscapes

  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Vascular Medicine (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Biomedical Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Engineering & Computer Science (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Transplantation (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Cardiology (AREA)
  • Prostheses (AREA)

Abstract

L'invention concerne un système ophtalmique pour corriger des défauts de la vue qui comprend une première lentille polarisée (Li), appropriée pour être intégrée à un œil (EB), pourvue d'une partie centrale (H) transparente à la lumière apte à remplir la fonction d'un sténopé, et comprend en outre une seconde lentille polarisée (L2) appropriée pour être montée à l'extérieur de l'oeil (EB) en couplage optique avec la première lentille (Li). Ce système ophtalmique permet de corriger des défauts de la vue sans restreindre la vision du patient sur lequel il est appliqué.
PCT/IB2019/052994 2019-04-11 2019-04-11 Système ophtalmique pour corriger des défauts de la vue Ceased WO2020208403A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IB2019/052994 WO2020208403A1 (fr) 2019-04-11 2019-04-11 Système ophtalmique pour corriger des défauts de la vue

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2019/052994 WO2020208403A1 (fr) 2019-04-11 2019-04-11 Système ophtalmique pour corriger des défauts de la vue

Publications (1)

Publication Number Publication Date
WO2020208403A1 true WO2020208403A1 (fr) 2020-10-15

Family

ID=66826994

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2019/052994 Ceased WO2020208403A1 (fr) 2019-04-11 2019-04-11 Système ophtalmique pour corriger des défauts de la vue

Country Status (1)

Country Link
WO (1) WO2020208403A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0375359A2 (fr) * 1988-12-20 1990-06-27 Allergan, Inc Système de lentilles correctives
US5245367A (en) * 1991-11-12 1993-09-14 David Miller Annular mask contact lenses
US20060259138A1 (en) * 2003-04-09 2006-11-16 Minu Telesystems Llc Intraocular lens for correcting presbyopia

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0375359A2 (fr) * 1988-12-20 1990-06-27 Allergan, Inc Système de lentilles correctives
US5245367A (en) * 1991-11-12 1993-09-14 David Miller Annular mask contact lenses
US20060259138A1 (en) * 2003-04-09 2006-11-16 Minu Telesystems Llc Intraocular lens for correcting presbyopia

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