WO2022219214A1 - Vision correction lens - Google Patents

Vision correction lens Download PDF

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Publication number
WO2022219214A1
WO2022219214A1 PCT/ES2022/070197 ES2022070197W WO2022219214A1 WO 2022219214 A1 WO2022219214 A1 WO 2022219214A1 ES 2022070197 W ES2022070197 W ES 2022070197W WO 2022219214 A1 WO2022219214 A1 WO 2022219214A1
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Prior art keywords
lens
vision correction
correction lens
center
lenticular body
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PCT/ES2022/070197
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Spanish (es)
French (fr)
Inventor
Juan Carlos CALVO LEÓN
Julio VILLAVERDE ROSENDE
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Sport Vision S.L.
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Publication of WO2022219214A1 publication Critical patent/WO2022219214A1/en

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    • 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
    • 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
    • G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive

Definitions

  • the present invention relates to a vision correction lens, which can encompass two types: intraocular and ocular surface.
  • All lenses for ophthalmic use have an optical center, which is normally at the geometric center of the lens.
  • the human eye is not a centered optical system since its surfaces are neither of revolution nor centered and perpendicular to each other, which means that it does not have an optical axis that coincides with the geometric centers of its structures.
  • a visual axis which is defined as the one that joins the fixation object with the first nodal point and the second nodal point with the center of the foveola on the retina. This axis is also called achromatic, because the rays that pass through it are neither deflected nor have transverse chromatic aberration, or this is minimal.
  • the pupillary axis which is the one that joins the fixation object with the center of the entrance pupil of the eye.
  • the angle formed by the visual axis and the pupillary axis is called kappa and its projection on the cornea is called the “mu chord”.
  • lenses that go in frames there are two other types of lenses that are used very frequently, and they are contact lenses -or lenses-, and intraocular lenses -which are inserted inside the globe eyepiece in different positions to try to compensate for graduation defects that an eye may have or due to problems of lack of transparency, especially at the level of the lens (cataract)-, and which are classified as anterior chamber intraocular lenses -the so-called ICL-, and pseudophakic intraocular lenses.
  • cataract surgery a cut is made in the lens capsule -capsulorhexis-, then the capsule of the lens nucleus is emptied, and the intraocular lens is placed inside this capsule.
  • Both contact lenses and intraocular lenses comprise a lenticular body with a centered optical center.
  • Intraocular lenses also have filaments called haptics or haptic handles on the sides, which serve to hold the lens and center it within the capsule according to the geometric axes of its structures, that is, as aligned as possible with the axis of the lens.
  • pupillary so that the central point of the lens -the center of the group that includes the lenticular body and the haptic loops, and where the optical center of the lenticular body is located- is located in coincidence with the center of the capsule, and therefore therefore with the pupillary axis.
  • centering is carried out by the concave shape of the lens itself, corresponding to the convexity of the cornea in the pupil area.
  • the haptic loops of intraocular lenses are symmetrical and have the same dimensions, so that the lens -when it is placed in the capsular bag- is centered with respect to this capsule, and depending on the anatomy of each individual it will have a better or worse centering relative to the pupillary axis.
  • the centering of intraocular lenses -both phakic and pseudophakic lenses- and of contact lenses with respect to the situation of the pupillary axis, depending on the patient's anatomy, can result in entoptic phenomena such as halos, distortion, prismatic effect, ghost lights, etc.
  • the centering of multifocal, bifocal, trifocal intraocular lenses, etc. which due to their design require greater precision in centering, preferably with respect to the monocular and/or binocular visual axis, is especially important.
  • the vision correction lens of the invention is of the type that comprises a lenticular body with an optical center where, according to the invention, the optical center is offset from the central point of the lens, that is, the geometric center with respect to the edge of the lens (the edge of the lenticular body in contact lenses or the center of the set that includes the lenticular body and the haptic loops) and that is the one that is positioned on the axis of the pupil when the lens is placed.
  • the surgeon can have one or several intraocular lenses of the invention with different offsets, and can choose the one that best suits each case, for better centering with respect to of the monocular and/or binocular visual axis of each patient.
  • Figures 1a and 1b.- Show, respectively, a lens of the invention in contact lens format, and the same lens placed in an eye.
  • Figure 2. Shows a partial section of a pupil with a lens of the invention in intraocular format, placed.
  • FIGS 3 and 4.- Show respective views of respective variants of the lens of the invention in intraocular format.
  • the vision correction lens (1) of the invention is of the type (see Figs. 1a and 2) that comprise a lenticular body (2) with an optical center (20), where according to the invention, the optical center (20) is off center with respect to the central point (10) of the lens (1) (that is, the point coinciding with the pupillary axis (22)).
  • the optical center (20) is offset from the geometric center (21) of the lenticular body (2) (which will be defined by the edge of the lens in lenses). of contact) so that, although the lenticular body (2) is centered with respect to the pupil (and therefore with respect to the pupillary axis (22)), its optical center (20) is off-center with respect to the central point (10) of the lens (1), which is coincident with the geometric center (21) of the lenticular body (2).
  • both soft and hybrid scleral support and rigid scleral lenses which currently have their optical center (20) in the geometric center (21), so that by means of the invention they can be implement different offsets that can be in steps of 0.1 mm towards the nasal or temporal, also depending on whether they are for a right or left eye, in addition to the offset in superior and inferior.
  • the lens Due to the criticality of their centering to maintain the optical center in coincidence with the visual axis (100) of the eye, once placed, they must have a marking (11) (laser engraving for example) that indicates eye and offset, as well such as the orientation marks on the bottom of it to know the positioning result of the lens once placed on the eye.
  • a marking (11) laser engraving for example
  • the lens In order for the positioning to be as stable as possible and in order to prevent the lens from rotating in the eye, it is convenient for the lens to have internal radii of curvature that adapt to the surface of the cornea, for example 7.80 mm in the horizontal meridian and 8.1 Omm in the vertical, which makes rotation difficult, they can also have aspherical surfaces, which can also help to facilitate adaptation, in addition to the visual advantages that this type of surface provides.
  • the lens In order to make it easier for the lens to self-center and place in position for use, it is convenient for the lens to have a lower base ballast or prism (12), which provides more weight in the lower area of the lens, along with the markings on that area that help both the professional and the user to visually identify which position of use is appropriate.
  • the lenticular body (2) comprises haptic loops (3) for centering the lens capsule (5). It would be the option for intraocular lens. For this reason, these haptic loops (3) can be made asymmetrical (see figs. 3 and 4), achieving an off-center placement of the lenticular body (2) so that the optical center (20) of the lenticular body (2) is positioned in coincidence with the visual axis (100). These intraocular lenses can be combined (see fig 2) with asymmetric haptics (3) and an off-center optical center (20) with respect to the geometric center (21) of the lenticular body (2). For their part, the haptic loops (3) can be simple, branched, simple and branched haptic loops (3) can be combined in the same lens, and/or comprise eyelets (30).

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

Abstract

Disclosed is a vision correction lens (1) comprising a lens body (2) with an optical centre (20), wherein the optical centre (20) is off centre with respect to the centre point (10) of the lens (1).

Description

LENTE DE CORRECCIÓN DE LA VISION
Figure imgf000002_0001
VISION CORRECTION LENS
Figure imgf000002_0001
OBJETO DE LA INVENCIÓN OBJECT OF THE INVENTION
La presente invención se refiere a una lente de corrección de la visión, que puede abarcar dos tipologías: intraocular y de superficie ocular. The present invention relates to a vision correction lens, which can encompass two types: intraocular and ocular surface.
ANTECEDENTES DE LA INVENCIÓN BACKGROUND OF THE INVENTION
Todas las lentes de uso oftálmico tienen un centro óptico, que normalmente está en el centro geométrico de la misma. El ojo humano, sin embargo, no es un sistema óptico centrado ya que sus superficies no son de revolución ni centradas y perpendiculares entre sí, lo que hace que no tenga un eje óptico que coincida con los centros geométricos de sus estructuras. Lo que sí tiene es un eje visual, que se define como aquel que une el objeto de fijación con el primer punto nodal y el segundo punto nodal con el centro de la foveola en la retina. A este eje también se lo denomina acromático, porque los rayos que pasan por él ni se desvían ni presentan aberración cromática transversal, o esta es mínima. All lenses for ophthalmic use have an optical center, which is normally at the geometric center of the lens. The human eye, however, is not a centered optical system since its surfaces are neither of revolution nor centered and perpendicular to each other, which means that it does not have an optical axis that coincides with the geometric centers of its structures. What it does have is a visual axis, which is defined as the one that joins the fixation object with the first nodal point and the second nodal point with the center of the foveola on the retina. This axis is also called achromatic, because the rays that pass through it are neither deflected nor have transverse chromatic aberration, or this is minimal.
También podemos definir el eje pupilar, que es el que une el objeto de fijación con el centro de la pupila de entrada del ojo. El ángulo que forman el eje visual y el pupilar se denomina kappa y su proyección sobre la córnea se denomina “cuerda mu”. We can also define the pupillary axis, which is the one that joins the fixation object with the center of the entrance pupil of the eye. The angle formed by the visual axis and the pupillary axis is called kappa and its projection on the cornea is called the “mu chord”.
Dejando de lado las lentes que van en monturas (lentes de gafas) hay otros dos tipos de lentes que se utilizan con mucha frecuencia, y que son las lentes de contacto -o lentillas-, y las lentes intraoculares -que se introducen dentro del globo ocular en diferentes posiciones para intentar compensar los defectos de graduación que pueda tener un ojo o por problemas de falta de transparencia sobre todo a nivel del cristalino (catarata)-, y que se clasifican en lentes intraoculares de cámara anterior -las denominadas ICL-, y lentes intraoculares pseudofáquicas. En la cirugía de catarata se realiza en la cápsula del cristalino un corte -capsulorrexis-, posteriormente se vacía la cápsula del núcleo del cristalino, y en el interior de esta capsula se coloca la lente intraocular. Leaving aside the lenses that go in frames (glass lenses) there are two other types of lenses that are used very frequently, and they are contact lenses -or lenses-, and intraocular lenses -which are inserted inside the globe eyepiece in different positions to try to compensate for graduation defects that an eye may have or due to problems of lack of transparency, especially at the level of the lens (cataract)-, and which are classified as anterior chamber intraocular lenses -the so-called ICL-, and pseudophakic intraocular lenses. In cataract surgery, a cut is made in the lens capsule -capsulorhexis-, then the capsule of the lens nucleus is emptied, and the intraocular lens is placed inside this capsule.
Tanto las lentes de contacto, como las lentes intraoculares, comprenden un cuerpo lenticular con centro óptico centrado. Las lentes intraoculares, además, tienen a los lados unos filamentos denominados hápticos o asas hápticas, que sirven para que la lente se sujete y centre dentro de la cápsula según los ejes geométricos de sus estructuras, esto es, lo más alineada posible con el eje pupilar, de forma que el punto central de la lente -el centro del conjunto que abarca el cuerpo lenticular y las asas hápticas, y donde está ubicado el centro óptico del cuerpo lenticular- se ubique en coincidencia con el centro de la cápsula, y por lo tanto con el eje pupilar. En las lentes de contacto el centrado lo realiza la propia forma cóncava de la lente, correspondiente con la convexidad de la córnea en la zona de la pupila Both contact lenses and intraocular lenses comprise a lenticular body with a centered optical center. Intraocular lenses also have filaments called haptics or haptic handles on the sides, which serve to hold the lens and center it within the capsule according to the geometric axes of its structures, that is, as aligned as possible with the axis of the lens. pupillary, so that the central point of the lens -the center of the group that includes the lenticular body and the haptic loops, and where the optical center of the lenticular body is located- is located in coincidence with the center of the capsule, and therefore therefore with the pupillary axis. In contact lenses, centering is carried out by the concave shape of the lens itself, corresponding to the convexity of the cornea in the pupil area.
Las asas hápticas de las lentes intraoculares son simétricas y tienen las mismas dimensiones, para que la lente -cuando está puesta en el saco capsular- se centre respecto a esta cápsula, y dependiendo de la propia anatomía de cada individuo tendrá un mejor o peor centrado respecto del eje pupilar. The haptic loops of intraocular lenses are symmetrical and have the same dimensions, so that the lens -when it is placed in the capsular bag- is centered with respect to this capsule, and depending on the anatomy of each individual it will have a better or worse centering relative to the pupillary axis.
Por ello, el centrado de las lentes intraoculares -tanto las lentes fáquicas como las pseudofáquicas- y de las lentes de contacto respecto de la situación del eje pupilar, en función de la anatomía del paciente, puede resultar en fenómenos entópticos como halos, distorsión, efecto prismático, luces fantasmas, etcétera. Es especialmente importante el centrado de las lentes intraoculares multifocales bifocales trifocales etcétera que por su diseño exigen una mayor precisión en el centrado preferentemente respecto del eje visual monocular y/o binocular. For this reason, the centering of intraocular lenses -both phakic and pseudophakic lenses- and of contact lenses with respect to the situation of the pupillary axis, depending on the patient's anatomy, can result in entoptic phenomena such as halos, distortion, prismatic effect, ghost lights, etc. The centering of multifocal, bifocal, trifocal intraocular lenses, etc., which due to their design require greater precision in centering, preferably with respect to the monocular and/or binocular visual axis, is especially important.
DESCRIPCIÓN DE LA INVENCIÓN DESCRIPTION OF THE INVENTION
La lente de corrección de la visión de la invención es del tipo que comprenden un cuerpo lenticular con un centro óptico donde de acuerdo con la invención, el centro óptico se encuentra descentrado respecto del punto central de la lente esto es, el centro geométrico respecto al borde de la lente (el borde del cuerpo lenticular en lentes de contacto o el centro del conjunto que abarca el cuerpo lenticular y las asas hápticas) y que es el se posiciona sobre el eje de la pupila cuando la lente está colocada. The vision correction lens of the invention is of the type that comprises a lenticular body with an optical center where, according to the invention, the optical center is offset from the central point of the lens, that is, the geometric center with respect to the edge of the lens (the edge of the lenticular body in contact lenses or the center of the set that includes the lenticular body and the haptic loops) and that is the one that is positioned on the axis of the pupil when the lens is placed.
De este modo, al tener el centro óptico desplazado, respecto del eje de la pupila se puede, conociendo mediante estudio previo el eje visual del paciente, colocar dicho centro óptico en coincidencia posicional con dicho eje visual (se permite el centrado de la lente -de su centro óptico- en la proyección sobre la córnea del eje visual), y de este modo evitar distorsiones en el resultado de la visión, debidas a variaciones de la propia anatomía del paciente. In this way, by having the optical center displaced, with respect to the axis of the pupil, it is possible, knowing the patient's visual axis through prior study, to place said optical center in positional coincidence with said visual axis (the centering of the lens is allowed - of its optical center - in the projection on the cornea of the visual axis), and thus avoid distortions in the result of vision, due to variations in the patient's own anatomy.
Efectivamente, conocida la posición del eje visual monocular y/o binocular (el que une el objeto de fijación con el punto de máxima resolución del ojo en la retina qué es la foveola y en concreto en la parte más central de la foveola que es el umbo foveolar de aproximadamente unos 0,15 mm de diámetro) sobre la córnea, el cirujano puede disponer de una o varias lentes intraoculares de la invención con distintos descentramientos, y puede elegir aquella que se adapte mejor en cada caso, para un mejor centrado respecto del eje visual monocular y/o binocular de cada paciente. Indeed, once the position of the monocular and/or binocular visual axis is known (the one that joins the fixation object with the point of maximum resolution of the eye on the retina, which is the foveola, and specifically in the most central part of the foveola, which is the foveolar umbo of approximately 0.15 mm in diameter) on the cornea, the surgeon can have one or several intraocular lenses of the invention with different offsets, and can choose the one that best suits each case, for better centering with respect to of the monocular and/or binocular visual axis of each patient.
Pero es que, además, tiene las siguientes ventajas desde el punto de vista óptico: But it is that, in addition, it has the following advantages from the optical point of view:
-Mejor calidad visual. -Better visual quality.
-Menor efecto prismático. -Less prismatic effect.
-Mínima aberración cromática transversal. -Minimum transverse chromatic aberration.
-Mejor equilibrio binocular. -Better binocular balance.
-Disminución de la aberración esférica. -Decrease in spherical aberration.
-Corrección óptica más precisa. -More precise optical correction.
-Mejor centrado foveolar. -Better foveolar centering.
-Sistema óptico más aplanático. -More aplanatic optical system.
Lo que proporciona las siguientes ventajas al paciente: Which provides the following advantages to the patient:
-Mejor confort visual, porque éste está relacionado directamente con el centrado. -Better visual comfort, because it is directly related to centering.
-Se disminuye los fenómenos de luces parasitas. -The phenomena of stray lights are reduced.
-Pueden ser compensadas más fácilmente las desviaciones verticales de los ejes visuales, que ocasionan multitud de problemas esqueleto musculares y absentismo laboral, por dolores posturales, relacionados con estas alteraciones. -Vertical deviations of the visual axes can be compensated more easily, which cause a multitude of musculoskeletal problems and work absenteeism, due to postural pain, related to these alterations.
-Mejora muchísimo la convergencia visual binocular en distancias visuales cortas. -Minimiza intervenciones (operaciones) de corrección o rechazo de las lentes intraoculares por no adaptación a la visión. -Greatly improves binocular visual convergence at short visual distances. -Minimizes interventions (operations) to correct or reject intraocular lenses due to non-adaptation to vision.
DESCRIPCIÓN DE LOS DIBUJOS DESCRIPTION OF THE DRAWINGS
Las figuras 1a y 1b.- Muestran respectivamente una lente de la invención en formato lente de contacto, y la misma lente colocada en un ojo. Figures 1a and 1b.- Show, respectively, a lens of the invention in contact lens format, and the same lens placed in an eye.
La figura 2.- Muestra una sección parcial de una pupila con una lente de la invención en formato intraocular, colocada. Figure 2.- Shows a partial section of a pupil with a lens of the invention in intraocular format, placed.
Las figuras 3 y 4.- Muestran sendas vistas de sendas variantes de la lente de la invención en formato intraocular. Figures 3 and 4.- Show respective views of respective variants of the lens of the invention in intraocular format.
REALIZACIÓN PREFERENTE DE LA INVENCIÓN PREFERRED EMBODIMENT OF THE INVENTION
La lente (1) de corrección de la visión de la invención es del tipo (ver figs. 1a y 2) que comprenden un cuerpo lenticular (2) con un centro óptico (20), donde de acuerdo con la invención, el centro óptico (20) se encuentra descentrado respecto del punto central (10) de la lente (1) (esto es, el punto en coincidencia con el eje pupilar (22)). The vision correction lens (1) of the invention is of the type (see Figs. 1a and 2) that comprise a lenticular body (2) with an optical center (20), where according to the invention, the optical center (20) is off center with respect to the central point (10) of the lens (1) (that is, the point coinciding with the pupillary axis (22)).
En una primera realización de la invención (ver figs. 1a y 1b), el centro óptico (20) se encuentra descentrado respecto del centro geométrico (21) del cuerpo lenticular (2) (que estará definido por el borde de la lente en lentes de contacto) de forma que, aunque el cuerpo lenticular (2) esté centrado respecto a la pupila (y por tanto respecto del eje pupilar (22)), su centro óptico (20) está descentrado respecto del punto central (10) de la lente (1), que es coincidente con el centro geométrico (21) del cuerpo lenticular (2). Esta es la realización en el caso de lentes de contacto, tanto blandas como híbridas de apoyo escleral y esclerales rígidas, que en la actualidad tienen su centro óptico (20) en el centro geométrico (21), por lo que mediante la invención se pueden implementar distintos descentrados que pueden ser de en pasos de 0.1 mm hacia nasal o a temporal, dependiendo también si son para un ojo derecho o izquierdo, además del descentramiento en superior e inferior. Así y a modo de ejemplo podríamos solicitar una lente de ojo derecho con 0.3 mm de descentramiento nasal y 0.5 mm inferior con la potencia y radios de curvatura requeridos. In a first embodiment of the invention (see Figs. 1a and 1b), the optical center (20) is offset from the geometric center (21) of the lenticular body (2) (which will be defined by the edge of the lens in lenses). of contact) so that, although the lenticular body (2) is centered with respect to the pupil (and therefore with respect to the pupillary axis (22)), its optical center (20) is off-center with respect to the central point (10) of the lens (1), which is coincident with the geometric center (21) of the lenticular body (2). This is the embodiment in the case of contact lenses, both soft and hybrid scleral support and rigid scleral lenses, which currently have their optical center (20) in the geometric center (21), so that by means of the invention they can be implement different offsets that can be in steps of 0.1 mm towards the nasal or temporal, also depending on whether they are for a right or left eye, in addition to the offset in superior and inferior. Thus, as an example, we could request a lens for the right eye with 0.3 mm of nasal offset and 0.5 mm lower with the power and radii of required curvature.
Debido a lo crítico del centrado de las mismas para mantener el centro óptico en coincidencia con el eje visual (100) del ojo, una vez colocadas, deben llevar un marcado (11) (grabado láser por ejemplo) que indique ojo y descentramiento, así como las marcas de orientación en la parte inferior de la misma para saber el resultado de posicionamiento de la lente una vez colocada en el ojo. Para que el posicionado sea lo más estable posible y a fin de evitar que la lente rote en el ojo es conveniente que la lente disponga de radios de curvatura internos que se adapten a la superficie de la córnea por ejemplo 7.80 mm en el meridiano horizontal y 8.1 Omm en el vertical, con lo que se dificulta la rotación, además pueden disponer de superficies asféricas, que además pueden contribuir a facilitar la adaptación, además de las ventajas visuales que este tipo de superficies aportan. Due to the criticality of their centering to maintain the optical center in coincidence with the visual axis (100) of the eye, once placed, they must have a marking (11) (laser engraving for example) that indicates eye and offset, as well such as the orientation marks on the bottom of it to know the positioning result of the lens once placed on the eye. In order for the positioning to be as stable as possible and in order to prevent the lens from rotating in the eye, it is convenient for the lens to have internal radii of curvature that adapt to the surface of the cornea, for example 7.80 mm in the horizontal meridian and 8.1 Omm in the vertical, which makes rotation difficult, they can also have aspherical surfaces, which can also help to facilitate adaptation, in addition to the visual advantages that this type of surface provides.
A fin de facilitar que la lente se auto centre y coloque en posición de uso, es conveniente que la lente tenga un balastro o prisma (12) base inferior, que aporta más peso en la zona inferior de la lente, junto con las marcas en esa zona que ayuden tanto al profesional como al usuario, a identificar visualmente que posición de uso es la adecuada. In order to make it easier for the lens to self-center and place in position for use, it is convenient for the lens to have a lower base ballast or prism (12), which provides more weight in the lower area of the lens, along with the markings on that area that help both the professional and the user to visually identify which position of use is appropriate.
Tanto el centrado de las lentes de superficie ocular difractivas o multifocales, como el centrado en las lentes intraoculares difractivas y multifocales, es especialmente importante para tener un resultado visual óptimo. Both the centration of diffractive or multifocal ocular surface lenses, and the centration of diffractive and multifocal intraocular lenses, are especially important for optimal visual results.
En una segunda realización de la invención (ver figs 2 a 4), el cuerpo lenticular (2) comprende unas asas hápticas (3) para centrado en la cápsula (5) del cristalino. Sería la opción para lente intraocular. Por ello, se puede hacer que estas asas hápticas (3) sean asimétricas (ver figs. 3 y 4), consiguiendo una colocación descentrada del cuerpo lenticular (2) para que el centro óptico (20) del cuerpo lenticular (2) se posicione en coincidencia con el eje visual (100). En estas lentes intraoculares pueden combinarse (ver fig 2) hápticas (3) asimétricas y centro óptico (20) descentrado respecto del centro geométrico (21) del cuerpo lenticular (2). Por su parte, las asas hápticas (3) pueden ser simples, ramificadas, pueden combinarse en una misma lente asas hápticas (3) simples y ramificadas, y/o comprender ojales (30). In a second embodiment of the invention (see Figs. 2 to 4), the lenticular body (2) comprises haptic loops (3) for centering the lens capsule (5). It would be the option for intraocular lens. For this reason, these haptic loops (3) can be made asymmetrical (see figs. 3 and 4), achieving an off-center placement of the lenticular body (2) so that the optical center (20) of the lenticular body (2) is positioned in coincidence with the visual axis (100). These intraocular lenses can be combined (see fig 2) with asymmetric haptics (3) and an off-center optical center (20) with respect to the geometric center (21) of the lenticular body (2). For their part, the haptic loops (3) can be simple, branched, simple and branched haptic loops (3) can be combined in the same lens, and/or comprise eyelets (30).
Descrita suficientemente la naturaleza de la invención, se indica que la descripción de la misma y de su forma de realización preferente debe interpretarse de modo no limitativo, y que abarca la totalidad de las posibles variantes de realización que se deduzcan del contenido de la presente memoria y de las reivindicaciones. Having sufficiently described the nature of the invention, it is indicated that the description of the itself and its preferred embodiment should be interpreted in a non-limiting way, and that it covers all the possible variants of embodiment that are deduced from the content of this specification and the claims.

Claims

1.-Lente (1) de corrección de la visión; del tipo que comprenden un cuerpo lenticular (2) con un centro óptico (20) caracterizada por que el centro óptico (20) se encuentra descentrado respecto del punto central (10) de la lente (1). 1.- Vision correction lens (1); of the type comprising a lenticular body (2) with an optical center (20) characterized in that the optical center (20) is offset from the central point (10) of the lens (1).
2. -Lente (1) de corrección de la visión según reivindicación 1 , donde el centro óptico (20) se encuentra descentrado respecto del centro geométrico (21) del cuerpo lenticular (2). 2. -Vision correction lens (1) according to claim 1, wherein the optical center (20) is offset from the geometric center (21) of the lenticular body (2).
3. -Lente (1) de corrección de la visión según reivindicación 2, que incorpora marcados (11) de identificación y posicionamiento. 3. -Vision correction lens (1) according to claim 2, incorporating markings (11) for identification and positioning.
4. -Lente (1) de corrección de la visión según cualquiera de las reivindicaciones 2 o 3, que comprende radios de curvatura internos adaptados a la superficie de la córnea en varios ejes. 4. -Vision correction lens (1) according to any of claims 2 or 3, comprising internal radii of curvature adapted to the surface of the cornea in various axes.
5. -Lente (1) de corrección de la visión según cualquiera de las reivindicaciones 2 a 4, que comprende superficies asféricas. 5. -Lens (1) for vision correction according to any of claims 2 to 4, comprising aspherical surfaces.
6. -Lente (1) de corrección de la visión según cualquiera de las reivindicaciones 2 a 5, que comprende un balastro o prisma (12) base inferior. 6. -Vision correction lens (1) according to any of claims 2 to 5, comprising a lower base ballast or prism (12).
7.-Lente (1) de corrección de la visión según cualquiera de las reivindicaciones 1 o 2, donde el cuerpo lenticular (2) comprende unas asas hápticas (3) para centrado en la cápsula (5) del cristalino. Vision correction lens (1) according to any of claims 1 or 2, wherein the lenticular body (2) comprises haptic handles (3) for centering on the lens capsule (5).
8. -Lente (1) de corrección de la visión según reivindicación 7, donde las asas hápticas (3) son asimétricas. 8. -Vision correction lens (1) according to claim 7, wherein the haptic handles (3) are asymmetric.
9. -Lente (1) de corrección de la visión según cualquiera de las reivindicaciones 7 o 8, donde las asas hápticas (3) son simples. 9. -Vision correction lens (1) according to any of claims 7 or 8, wherein the haptic handles (3) are simple.
10. -Lente (1) de corrección de la visión según cualquiera de las reivindicaciones 7 o 8, donde, donde las asas hápticas (3) son ramificadas. 10. -Vision correction lens (1) according to any of claims 7 or 8, where, where the haptic handles (3) are branched.
11. -Lente (1) de corrección de la visión según cualquiera de las reivindicaciones 7 a 10, donde las asas hápticas (3) comprenden ojales (30). 11. -Vision correction lens (1) according to any of claims 7 to 10, wherein the haptic handles (3) comprise eyelets (30).
PCT/ES2022/070197 2021-04-12 2022-04-01 Vision correction lens WO2022219214A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011151839A2 (en) * 2010-05-31 2011-12-08 Ram Srikanth Mirlay Pupil centered fovea focused optics assembly for intraocular lens
EP3115830A1 (en) * 2014-03-04 2017-01-11 Menicon Co., Ltd. Decentered type contact lens and decentered type contact lens set
WO2021056059A1 (en) * 2019-09-25 2021-04-01 Nthalmic Holding Pty Ltd A freeform contact lens solution for myopia

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011151839A2 (en) * 2010-05-31 2011-12-08 Ram Srikanth Mirlay Pupil centered fovea focused optics assembly for intraocular lens
EP3115830A1 (en) * 2014-03-04 2017-01-11 Menicon Co., Ltd. Decentered type contact lens and decentered type contact lens set
WO2021056059A1 (en) * 2019-09-25 2021-04-01 Nthalmic Holding Pty Ltd A freeform contact lens solution for myopia

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