82 results about "Artificial intraocular lens" patented technology

An artificial lens (1) (contact lens or intraocular lens) for correcting presbyopia, possibly associated with other refractive defects, has at least one region (5) having a fourth-order spherical aberration in OSA notation greater than −1.5 μm and less than zero μm, and possibly associated with a basic vertex power for correcting refractive defects, and with higher-order aberrations for improving vision acuity. The lens is produced by ablating a surface of a base body of the lens by means of an appropriately controlled laser device, and according to a given photoablative pattern to induce the desired aberration.

The invention relates to a surface comblike polymer hydrophilic modified artificial lens and a preparation method thereof. The preparation method of the surface comblike polymer hydrophilic modified artificial lens comprises the following process steps of carrying out surface treatment on a clean artificial lens by using an amino functional group contained silane coupling agent to enable the surface of the clean artificial lens to have an amino group; grafting a carboxyl functional group contained RAFT (Reversible Addition-Fragmentation Transfer) chain transfer agent on the artificial lens by using a chemical method; and carrying out in-situ polymerization on a hydrophilic monomer molecule on the surface of the artificial lens by using an RAFT polymerization reaction method initiated on the surface of the artificial lens to form a hydrophilic comblike polymer to obtain the surface comblike polymer hydrophilic modified artificial lens. The surface comblike polymer hydrophilic modified artificial lens has the advantages that the condition that the artificial lens has toxic and side effects to non-targeting cells when being applied to a traditional drug coating is avoided, and the artificial lens with high biocompatibility is obtained.

A silicone oil having a mean molecular weight average greater than about 20,000 Daltons, with no more than about 3% to about 4% of the total silicone oil by weight being comprised of components having a molecular weight less than about 15,000 Daltons. In some embodiments, the silicone oil is used in intraocular lens devices.

The invention relates to a modification process of a surface bionic self-assembly multilayer film of an artificial lens and the artificial lens provided with the surface bionic self-assembly multilayer film. The modification process of the surface bionic self-assembly multilayer film of the artificial lens comprises the following steps: the well cleaned artificial lens is provided with positive charge through surface pre-treatment, soaked into biomacromolecule polyelectrolyte solution provided with negative charge, placed still for electrostatic adsorption for a period of time, taken out and cleaned; then the artificial lens is soaked into biomacromolecule polyelectrolyte solution provided with positive charge, placed still for electrostatic adsorption for a period of time, taken out and cleaned; the alternative electrostatic assembly process is repeated for several times, at last the artificial lens is dried at room temperature, and the artificial lens modified by the surface bionic self-assembly multilayer film is obtained. The modification process of the surface bionic self-assembly multilayer film of the artificial lens and the artificial lens provided with the surface bionic self-assembly multilayer film have the advantages that a bionic modification layer formed by an artificial lens surface bionic lens envelope is obtained through a simple, convenient and rapid bionic method, adhesion and breeding of impedance lens epithelial cells are achieved, toxic and side effects on non-target cells existing in the application of a drug coating artificial lens are avoided, and the obtained artificial lens is high in biological compatibility.

The invention discloses an artificial capsular bag, which comprises a front capsule and a back capsule, the peripheral edges of the front capsule and the back capsule are fixedly connected, and the outer periphery of the joint is provided with a The fixed part of the front layer capsule and the back layer capsule are all soft hyaluronic capsules, and the middle part of the front layer capsule is provided with a relief hole for facilitating the implantation of the intraocular lens. The artificial capsular bag is fixedly connected by the circumferential edges of the anterior capsule and the posterior capsule to form a complete sealed bag. It can be implanted into the eye through a small incision, and can be fixed on the patient's eye through the fixing part. After the intraocular lens is implanted into the artificial capsule bag from the relief hole, the position of the intraocular lens can be guaranteed through the artificial capsule bag, so that the intraocular lens is in the center of the eye. The axis is central and perpendicular to the visual axis so that light rays entering the eye are focused and directed onto the retina.

The invention relates to an artificial lens with a polyhedral oligomeric silsesquioxane-modified surface and a preparation method thereof. The preparation method of the artificial lens with the polyhedral oligomeric silsesquioxane-modified surface includes the following process steps: a clean artificial lens is chosen, and by surface pretreatment, a chemically active surface is obtained; the chemically active surface chemically reacts with POSS (polyhedral oligomeric silsesquioxane) containing reactable functional groups, so that the artificial lens, on the surface of which is the POSS is grafted, is obtained. The invention has the advantage that a surface composite micronanostructure is obtained by nano POS modification, so that the super-hydrophobic surface is obtained to inhibit the adhesion of epithelial cells on the lens, and thereby the highly biocompatible artificial lens is obtained.

The invention discloses a variable multi-focus artificial lens. The artificial lens comprises an optical body (1), loops (2) and silica gel connecting pieces (3), wherein the silica gel connecting pieces (3) are located between the optical body (1) and the loops (2), and the optical body (1) and the loops (2) are combined together through concave and convex grooves in a spliced manner. Grooves (4) are formed in two ends of the optical body (1), and grooves (5) are formed in the ends, combining with the optical body (1), of the loops (2). The convex grooves are formed in two ends of each of the silica gel connecting piece (3) respectively in the width direction, including the convex groove (6) and the convex groove (7). The optical body is a multi-focus optical zone, and focal power change of the multi-focus artificial lens can be effectively increased through back-and-forth movement in the multi-focus optical zone.

A multifocal IOL (M-IOL) has a phase-altering characteristic that can control the diffraction and interference of light propagating there through to effect multifocality and extended depth of focus (EDOF). The embodied IOLs include engineered, discrete phase profiles on one or both of the anterior and posterior surfaces of the lens to intentionally manipulate the light in a designated manner. A design method for defining the discrete phase profile on the lens surface. The engineered phase profile is constructed by concentric annular zones having an abrupt step jump at the trailing circumferential edge of each zone. An optical modeling method to simulate the optical performance of the embodied IOLs in an optical ray tracing environment.

Multifocal intraocular lens with extended depth of field that comprises, in at least one of the surfaces (2), a small zone with a multifocal profile with a defined optical axis (3) and, in the peripheral region and coaxial to the multifocal zone, a ring-shaped opaque mask (1) that partially or totally block light to produce a small aperture effect and, therefore, the multifocal profile has a radius equal or larger than the internal radius of the mask (1), and there is at least one transition between focal zones or one diffractive step inside the internal radius of the mask (1).

The invention belongs to the technical field of ophthalmic lenses, and particularly relates to an intraocular lens resistant to eccentricity and inclination clinically. The intraocular lens resistantto eccentricity and inclination clinically is a high-order aspheric intraocular lens with weak negative spherical aberration, and the intraocular lens is placed in a posterior chamber of the human eyeto replace a turbid natural lens. The intraocular lens has the weak negative spherical aberration of-0.1 micron - 0, and plays a role in compensating the positive spherical aberration of the human cornea. The intraocular lens comprises an anterior optical surface and a posterior optical surface, wherein at least one of the anterior optical surface and the posterior optical surface is an asphericoptical surface. The intraocular lens provided by the invention has better contrast sensitivity under a dark light condition (namely under a large-aperture diaphragm), and can improve the overall imaging quality of an intraocular lens eye under a real postoperative clinical condition.

A fiducial is generated on an internal anatomical structure of the eye of a patient with a surgical laser. A tonic artificial intraocular lens (IOL) is positioned so that a marker of the tonic IOL is in a predetermined positional relationship relative to the fiducial. This positioning aligns the tonic IOL with the astigmatic or other axis of the eye. The toric IOL is then implanted in the eye of the patient with high accuracy.

An intraocular lens includes an optical portion of a transparent, deformable material, at least one haptic radially projecting from the optical portion for supporting the optical portion in a position parallel to and against an anterior iris surface plane, and at least one aperture bounded by the haptic. At least a stiff portion of the haptic has a higher stiffness against bending about an axis in the radial direction than the optical portion. Furthermore, the stiff portion has a width (a) measured parallel to the plane and perpendicular to the radial direction, which is smaller than the size (b) of the optical portion in the direction of the width. An instrument and methods for preparing and carrying out insertion of such a lens are also described. <IMAGE>

The invention relates to an artificial intelligence-assisted optimized highly myopia intraocular lens degree calculator using method, which comprises the following steps: S1, inputting basic information of a patient, and substituting the basic information into a Barrett calculation formula to obtain an IOL degree and a corresponding predicted diopter; s2, inputting the obtained IOL degree and diopter into XGBoost model carrying software; s3, outputting the optimized predicted diopter based on the long eye axis; and S4, comparing the optimized predicted diopter with the target diopter. The method has the advantages that the degree of the intraocular lens can be accurately calculated and the postoperative reserved diopter can be predicted before the high-myopia intraocular lens implantation operation, myopia drift or hyperopia drift occurring after the operation can be effectively reduced, and the visual effect after the intraocular lens implantation operation is improved; the postoperative refraction state of a patient with high myopia can be accurately predicted, and the satisfaction degree of the patient is increased.

The invention relates to an artificial eye lens comprising an optical part, which has a first optical side as viewed in a direction of an optical principal axis of the artificial eye lens and an opposite second optical side, wherein a structure with at least one depression is formed in a haptic arrangement of the artificial eye lens and/or in a surround that surrounds the optical part at least in certain areas and that differs from the haptic arrangement, wherein the structure is formed as a micro-perforation with a multiplicity of perforation zones and at least some perforation zones are filled at least in certain areas with at least one medicament for the purposes of producing a medicament repository. The invention also relates to a method for producing such an artificial eye lens.

The invention relates to an intraocular lens. The intraocular lens comprises a lens main body, wherein at least one side surface of the lens main body is provided with a focus-determining diffraction region and a focus-shifting diffraction region; the focus-determining diffraction region comprises at least two focus-determining diffraction structures with different heights, and the focus-determining diffraction structures with different heights are alternately arranged, so that focuses corresponding to long-distance vision, middle-distance vision and short-distance vision respectively are provided for the artificial lens; the focus-shifting diffraction region comprises focus-shifting diffraction structures corresponding to the focus-determining diffraction structures; and the height ratio of at least one focus-shifting diffraction structure to the corresponding focus-determining diffraction structure is 1.1-1.3 or 0.80-0.95. The focus-shifting diffraction structures provide offset focuses for the artificial lens, and the offset focuses are located between focuses corresponding to the long-distance vision and the middle-distance vision and/or located between focuses corresponding to the middle-distance vision and the short-distance vision. The artificial lens can provide smooth vision transition for a patient in the switching process between different sight distances.