86 results about "Lens crystalline" patented technology

A system and apparatus for increasing the amplitude of accommodation and/or changing the refractive power and/or enabling the removal of the clear or cataractous lens material of a natural crystalline lens is provided. Generally, the system comprises a laser, optics for delivering the laser beam and a control system for delivering the laser beam to the lens in a particular pattern. There is further provided apparatus for determining the shape and position of the lens with respect to the laser. There is yet further provided a method and system for delivering a laser beam in the lens of the eye in a predetermined shot pattern.

An improved intraocular lens (42) is provided which more closely mimics the accommodation and focusing of the eye's natural lens. The lens (42) comprises an optic (44) and a flexible, resilient optic positioning element (46) which includes an anterior section (48), a posterior section (50), a bight (56), in cross-section, joining the anterior and posterior sections, and a haptic arm (58) extending between the optic (44) and the optic positioning element (46). The lens (42) may optionally include a posterior optic (44a) coupled to the optic positioning element (46). The optic positioning element (46) is formed of unitary construction. The anterior (48) and posterior (50) sections are configured for yieldable engagement with the anterior (52) and posterior (54) walls of the eye capsule (30), respectively.

A system and method for inserting an intraocular lens in a patient's eye includes a light source for generating a light beam, a scanner for deflecting the light beam to form an enclosed treatment pattern that includes a registration feature, and a delivery system for delivering the enclosed treatment pattern to target tissue in the patient's eye to form an enclosed incision therein having the registration feature. An intraocular lens is placed within the enclosed incision, wherein the intraocular lens has a registration feature that engages with the registration feature of the enclosed incision. Alternately, the scanner can make a separate registration incision for a post that is connected to the intraocular lens via a strut member.

The present invention relates to a fluidic intraocular lens inserted into a capsular bag of an eye to replace a crystalline lens. The fluidic intraocular lens may be shaped by elastic membranes bonded to a support ring. The space inside the device may be filled with optically transparent fluid or gel having an index of refraction greater than the index of vitreous humor. The device may be such designed so that the focusing power of the lens can be changed by the deformation of the capsular bag, which may be subsequently controlled by a ciliary muscle.

The present invention relates to an accommodating intraocular lens, which is suitable for replacement of the natural crystalline lens of the eye within the capsular bag. The intraocular lens can include a retainer plate with an annular region surrounding a central opening, and an optical lens. The retainer plate acts as a foundation for the optical lens, as the retainer plate can be positioned near or at the posterior portion of the lens capsule. The optical lens can sit on the retainer plate, but is otherwise not attached to the retainer plate. The optical lens can overlap or fit within the central opening of the retainer plate. The retainer plate can include a lip portion integrally disposed on a region of the retainer plate, wherein the lip provides a surface for holding at least a portion of an intraocular lens.

Apparatus and method for the removal of lens tissue includes a first handpiece having a laser emitting probe sized for insertion into a lens capsule and radiating a lens therein. The laser emitting probe includes a lumen for introducing irrigation fluid into the lens capsule. A second handpiece includes a pulsed controlled vibrated needle for insertion into the lens capsule and emulsifying laser eradiated lens tissue. The vibrated needle includes a lumen therethrough for aspiration of emulsified lens tissue and irrigation fluid.

A laser instrument for therapy on the human eye, designed for surgery of the cornea, the sclera, the vitreous body or the crystalline lens, especially suitable for use in immediate succession with other instruments for eye diagnosis or eye therapy, in such a way that during the alternating use of the various instruments, the eye or at least the patient preferably remains in a predetermined position and alignment within one and the same treatment area.

An accommodative intraocular lens system for treating presbyopic is disclosed. The system includes a first lens having negative optic power adapted for placement in the posterior chamber of the eye and capable of moving forward and back along the optic axis; and a second lens having a positive optic power which is implanted within the capsular bag. The second lens can be the natural crystalline lens of the eye. The position of the first lens, forward or back relative to the second lens, focuses the eye for seeing distant or close-in objects.

An intraocular lens is provided that includes an optic body having anterior and posterior walls, a chamber, and optically transmissive primary and secondary fluids, and method for making and using the same. The secondary fluid is substantially immiscible with the primary fluid and has a different density and a different refractive index than the primary fluid. The primary fluid is present in a sufficient amount that orienting optical body optical axis horizontally for far vision positions the optical axis through the primary fluid, thereby immersing the anterior and posterior optical centers in the primary fluid. The secondary fluid is contained in the optic body in a sufficient amount that orienting the optical axis over a range of effective downward angles relative to the horizontal for near vision positions the optical axis to extend through the primary fluid and the secondary fluid, thus changing the focus of the intraocular lens.

The present invention relates to an intraocular correction lens for implantation in the posterior chamber of the eye between the iris and the intact natural lens. The lens has a concave posterior surface which is part of a non-spherical surface that is rotation symmetric around the optical axis of said optical part, wherein the intersection between said non-spherical surface and any plane containing the optical axis of the lens represents a flawless curve free from discontinuities and points of inflection. The invention also relates to methods of selecting correction lenses based on estimations of the individual eye in need of vision correction and thereby arriving with a correction lens with a high safety for wearer with respect to surrounding eye tissues.

A two-optic accommodative lens system is disclosed. Two coupled lenses are located within the capsular bag to extend depth of focus and/or restore accommodation following extraction of a natural lens. The first lens comprises a spring-like structure attaching an optic to a ring-like support structure. The optic can be a monofocal or multifocal optical element having a positive or negative power. The first lens further comprises features designed to couple the ring-like structure to a second lens. The first lens can be located anteriorly within the capsular bag. The second lens is located posteriorly to the first lens within the capsular bag and can have an opposite or supplementary power to that of the first lens. The second lens can also be a monofocal or multifocal lens and comprises a plurality of haptics which can be used to size the lens system over a range of capsular bag sizes. The second lens further comprises features for coupling the second lens to the ring-like structure of the first lens. The haptics of the second lens are relatively firm, yet still flexible and can be configured to interlock with features of the ring-like structure.

A spatial focal field type glasses display product can present virtual images at different distances simultaneously. The product is a frame type glasses or corneal contact lens and comprises a projection component and a display control device. The projection component comprises a plurality of projection units, each projection unit projects a plurality of elementary beams. The elementary beams projected by the same projection unit diverge and do not intercept with each other. The elementary beams projected by different projection units intersect near the retina after passing through the crystalline lens. The intersection point is a cluster focus. All cluster focuses form a spatial focal field which envelop the retina. When the diopter of the crystalline lens changes, the spatial focal field displaces and deforms accordingly, so different cluster focuses fall on the retina to be seen clearly, while the other cluster focuses tend to disperse and cannot be seen clearly.

A lens delivery system having a two folding mechanisms. The first mechanism is structured to fold an intraocular lens stabilizing ring, and the second mechanism is designed to fold an intraocular lens.

The current invention relates to the method to achieve artificial vision with using flexible substrate based light emitting arrays, or optical passage arrays, to project image upon the retina of a human eye. Further, it relates to the method to detect the real-time focal length change of the eye-lens and modify the flexible substrate curvature and distance from the eye to vary global angle configurations of light beams that go into the eye to produce images on the retina at various focus depth of the eye to achieve re-focusable artificial vision.

An ophthalmological laser system for photodisruptive irradiation of ocular tissue, including a crystalline lens or a cornea. The system includes an ultra-short pulse laser, the radiation of which is focusable as illumination light via an illumination beam path including a scanner unit and focusing optics. A control unit is programmed to execute determining irradiation control data for photodisruptions at irradiation points in an interior of the ocular tissue distributed three-dimensionally and non-equidistantly to create at least one predetermined target incision. The laser system then irradiates the ocular tissue according to the determined irradiation control data.

These methods, devices, and structures are useful in the field of ophthalmology; the devices and methods relate variously to separating or lifting corneal epithelium from the eye preferably in a substantially continuous layer, placing a lens or other suitable ocular or medical device beneath the epithelial membrane, and to the resulting structures formed by those procedures. The de-epilthelialization devices generally utilize a non-cutting separator or dissector that is configured to separate the epithelium at a naturally occurring cleavage surface in the eye between the epithelium and the corneal stroma (Bowman's membrane), specifically separating in the region of the lamina lucida. The separator or dissector may have a structure that rolls or vibrates (or both) at that cleavage surface or interface during the dissection step. The separated epithelium may be lifted or peeled from the surface of the eye to form an epithelial flap or a pocket. The epithelium may then be replaced on the cornea after a refractive procedure or after placement of an ocular lens (or other subepithelial device) on the eye. The subepithelial device may comprise a wide variety of synthetic, natural, or composite polymeric materials. The step of replacing epithelial tissue upon the subepithelial device or upon the anterior corneal surface promotes epithelial healing.

Small aperture (pinhole) intraocular implant to increase depth of focus comprising a diaphragm juxtaposed to the front surface of a lens implanted previously, having its anterior surface convex and its posterior surface concave. The diaphragm is held in position by inserting engaging means in the ciliary sulcus.

It is proposed that said diaphragm is opaque to a visible light spectrum and transparent to light in the infrared range and is equipped with passage means of visible light in its central region, such as a through hole whose diameter is between 1 mm and 2.5 mm.

The constriction of the incident light rays increases the depth of focus, featuring a pinhole effect. The engagement means may be provided by two handles shaped with curved proximal ends joined to the peripheral edge of said diaphragm and having substantially circular section with a diameter between 80 μm and 800 μm or two handles of the same material as the diaphragm and constituting an extension of this edge, or even one elongated platform whose center is located in the small-diameter circular opening.

The invention is characterised by the provision that in a slit lamp or a slit lamp projector an oblique thin glass flat with a partial reflection of the light is disposed at a defined angle relative to the optical path above the filter assembly between the latter and the "slit projector" lens (4), and in the configuration with an achromatic doublet lens between the lens assemblies in the parallel optical path, in such a way that as a result one part of the incident rays is incident as deflected light cone on a detector assembly which is arranged laterally in the housing at an angle dependent on the angle of the thin glass flat in the housing, which detector assembly measures the respectively existing luminous intensity, transmits the detected values to an evaluation and control means which compares the values so received against a predetermined maximum value, calculates the irradiation dose for the phakic or aphakic eye and, when the value is exceeded, signals this situation on an indicating alarm means and/or reduces the luminous intensity automatically to the predetermined maximum value in a controlled manner.

A method and apparatus for directing relatively gentle pulses of heated surgical fluid against the capsular bag to assist in the removal of lens epithelial cells and cortical material adhered to the capsular bag.

A method of generating three dimensional shapes for a cornea and lens, the method including illuminating an eye with multiple sections of light and obtaining multiple sectional images of the eye based on the multiple sections of light. For each obtained multiple sectional image, the following processes are performed:

• • a) automatically identifying arcs corresponding to anterior and posterior corneal and lens surfaces of the eye by image analysis and curve fitting of the obtained multiple sectional images; and
  • b) determining an intersection of lines ray traced back from the identified arcs with a known position of a section of space containing the section of light that generated the obtained multiple sectional images, wherein the intersection defines a three-dimensional arc curve. The method further including reconstructing three-dimensional shapes of the cornea surfaces and the lens surfaces based on fitting the three-dimensional arc curve to a three-dimensional shape.

Apparatus and methods to increase the depth of field in human vision in order to correct for loss in refocusing ability. Optics variations, such as changes in thickness, shape, or index of refraction of contact lenses, intraocular implants, or the shape of the cornea or eye lens, affect the phase, or wavefront, of the light perceived by the eye. The optics variations are chosen such that the resulting optical transfer function remains relatively constant over a desired range of object distances and pupil diameters.

An intraocular lens to be fixed in an eyeball has an optical pupil to provide a pinhole effect at the front center of the lens. The optical pupil is constituted by a limitative pattern that is partly formed in the front peripheral center of the lens to limit part of an optical path.

The invention discloses an eye ground retina OCT image correction method. The method comprises the steps that scanning beams scan an anterior segment and a posterior segment, and meanwhile a human anterior segment OCT image and an eye ground retina OCT image are obtained, wherein the human anterior segment OCT image contains a corneal OCT image, a crystalline lens anterior surface OCT image and a crystalline lens posterior surface OCT image, and the human anterior segment OCT image and the eye ground retina OCT image are processed by a computer without correction; the OCT images are corrected and restored to images with a true form to obtain the corneal anterior surface curvature radius, the corneal posterior surface curvature radius, the crystalline lens anterior surface curvature radius, the crystalline lens posterior surface curvature radius, the corneal thickness, the anterior chamber depth and the crystalline lens thickness; a rendezvous point (O45) of center lines of the scanning beams which are refracted by the posterior surface of a crystalline lens is determined, and the circle center of the sector scanning region and the scanning angle (uO45) are calculated; the uncorrected eye ground retina OCT image is restored to an image with a true form, and finally a true sectional image of an eye ground retina is obtained through restoration and the curvature of the eye ground retina is measured according to a measured anterior segment OCT image and a measured posterior segment OCT image.