2437 results about "Eye lens" patented technology

A method of designing a multifocal ophthalmic lens with one base focus and at least one additional focus, capable of reducing aberrations of the eye for at least one of the foci after its implantation, comprising the steps of: (i) characterizing at least one corneal surface as a mathematical model; (ii) calculating the resulting aberrations of said corneal surface(s) by employing said mathematical model; (iii) modelling the multifocal ophthalmic lens such that a wavefront arriving from an optical system comprising said lens and said at least one corneal surface obtains reduced aberrations for at least one of the foci. There is also disclosed a method of selecting a multifocal intraocular lens, a method of designing a multifocal ophthalmic lens based on corneal data from a group of patients, and a multifocal ophthalmic lens.

The present invention provides an ophthalmic lens capable of correcting or minimizing presbyopia, or of functioning used as an anti-myopic lens. The ophthalmic lens can be a contact lens, a phakic intraocular lens or an aphakic intraocular lens. The ophthalmic lens comprises an optical zone, the optical zone having a first surface and an opposite second surface and including a coma-like wavefront aberration oriented vertically from the top to the bottom of the ophthalmic lens. In addition, the present invention provides a method for minimizing / correcting presbyopia or for preventing children's eyes from becoming severely myopic.

Biomedical devices, such as ophthalmic lenses, and methods of making such devices having a surface coating including at least one polyionic layer. A preferred method involves spray coating a polycationic material onto a core lens, rinsing and drying the lens, followed by spray coating a polyanionic material, rinsing and drying. The coating process may be applied a plurality of times to achieve a multi-layer coating on the lens surface. A particularly preferred embodiment is a contact lens comprising a highly oxygen permeable hydrophobic core coated with a 5 to 20 bilayers of hydrophilic polyionic materials.

Wavefront measuring systems and methods are disclosed which may be employed, for example, in detecting phase aberrations in a spectacle lens and in an eye. Various embodiments include disposing a modulation pattern in the path of a return beam from the spectacle lens or the eye, and imaging a diffraction pattern at a self-imaging plane relative to the modulation pattern with a detector. The diffraction pattern is analyzed and the results are used to produce a representation of the wavefront phase characteristics that describe aberrations in the lens or eye being measured. Illumination and processing techniques for improving the measurement results are dislcosed. Various embodiments comprise systems adaptable to both measure aberrations in lenses in spectacles as well as in a patient's eyes.

This invention discloses a device comprising multiple functional layers formed on substrates, wherein at least one functional layer comprises an electrical energy source. In some embodiments, the present invention includes a component for incorporation into ophthalmic lenses that has been formed by the stacking of multiple functionalized layers.

The present invention provides monofocal ophthalmic lenses that exhibit extended depth of field while providing sufficient contrast for resolution of an image over a selected range of defocus distances. In some embodiments, a lens of the invention can include a refractive surface having controlled surface modulations relative to a base profile. The surface modulations are designed to extend a depth of field of the lens such that a single image can be resolved, albeit with somewhat less contrast, over a range of distances greater than the focal region of a conventional lens. The ophthalmic lenses of the invention can be employed in various vision correction applications, including, but not limited to, intraocular lenses, contact lenses, instrastromal implants and other refractive devices.

The present invention relates to making optical articles such as opthalmic lenses by molding and, in particular, to using a continuous extrusion-compression molding method to make plastic lenses whereby a polymer melt is fed from an extruder or melting apparatus to a first die of a plurality of rotating or conveyed sequentially processed compression die sets comprising a first die and a second die. The die sets are positioned on die supports on a rotating turntable or conveying system, the lenses formed by compressing the die sets with pressing means associated with each die support, the lenses separated from the dies and the dies recycled to die loading and the melt feed step of the process and the process repeated until the desired number of lenses or other optical articles such as compact disk substrates are produced.

The present invention provides single vision and multifocal lenses, as well as methods for their production, having a transverse chromatic aberration enabling provision of a lens the performance of which is equivalent to a refractive lens with a higher Abbe number.

An intraocular correction lens has at least one aspheric surface which when its aberrations are expressed as a linear combination of polynomial terms, is capable of, in combination with a lens in the capsular bag of an eye, reducing similar such aberration terms obtained in a wavefront having passed the cornea, thereby obtaining an eye sufficiently free from aberrations.

Disclosed is a photometer that employs high dynamic range (HDR) image processing and manipulation algorithms for capturing and measuring real-time sky conditions for processing into control input signals to a building's automated fenestration (AF) system, daylight harvesting (DH) system and HVAC system. The photometer comprises a color camera and a fitted fish-eye lens to capture 360-degree, hemispherical, low dynamic range (LDR) color images of the sky. Both camera and lens are housed in a sealed enclosure protecting them from environmental elements and conditions. In some embodiments the camera and processes are controlled and implemented by a back-end computer.

The invention concerns surgical lasers and their controllers as well as methods for the treatment of an eye lens, especially for the treatment of presbyopia.

A method of treating an ophthalmic lens in a package involves: placing the lens and an aqueous solution in a recess of package, the solution including an organic surface treatment agent that attaches to anterior and posterior surfaces of the lens; and sealing the recess of the package with lidstock and sterilizing the package contents. The bottom of the recess includes grooves.

The invention provides lenses for correcting presbyopia in which the near vision segments interfere at least about 50% less with distance vision than do the near vision segments in conventional contact lenses.

The present invention provides improved ophthalmic lenses and methods for their design and use. Monofocal and multifocal diffractive ophthalmic lenses having reduced light scatter and / or improved light energy distribution properties are provided. These properties are provided by the diffractive profiles of the invention, often having subtlely shaped echelettes with appropriately curving profiles. Light scatter may be generated by the sharp corners associated with vertical steps between adjacent conventional diffractive echelettes. Smooth diffractive profiles of the invention reduce light scatter. Light energy directed towards non-viewing diffractive orders may have a unwanted effects on vision quality. Diffractive profiles of the invention may limit the light energy in certain, selected orders, thereby improving viewing quality and mitigating unwanted effects such as dysphotopsia. Diffractive profiles of the invention can also vary the light energy distributed between individual echelettes, providing additional advantages in various viewing situations.

An electro-active spectacle lens is disclosed. The spectacle lens comprises a first substrate having a first outer region and first inner region, a first electrode layer disposed adjacent to the first inner region, the first electrode layer including an outer electrode region having a first conductivity and an inner electrode region having a second conductivity, the first conductivity being greater than the second conductivity, a second substrate having a second outer region and second inner region, a second electrode layer disposed adjacent to the second inner region, the second electrode layer having a third conductivity, and an electro-active cell disposed between the first electrode layer and the second electrode layer, the electro-active cell containing an electro-active material. The first outer region and second outer region are configurable for fitting the spectacle lens within a lens frame without altering the electro-active cell.

The present invention provides a method for designing and making a customized ophthalmic lens, such as a contact lens or an intraocular lens, capable of correcting high-order aberrations of an eye. The posterior surface of the customized contact lens is designed to accommodate the corneal topography of an eye. The design of the customized ophthalmic lens is evaluated and optimized in an optimizing routine using a computational model eye that reproduces the aberrations and corneal topography of an eye. The present invention also provides a system and method for characterizing the optical metrology of a customized ophthalmic lens that is designed to correct aberrations of an eye. Furthermore, the present invention provides a business model and method for placing an order for a pair of customized ophthalmic lenses.

A method of treating an ophthalmic lens in a package involves: placing the lens and an aqueous solution in a recess of package, the solution including an organic surface treatment agent that attaches to anterior and posterior surfaces of the lens; and sealing the recess of the package with lidstock and sterilizing the package contents. The bottom of the recess includes raised projections.

Systems and methods for providing enhanced image quality across a wide and extended range of foci encompass vision treatment techniques and ophthalmic lenses such as contact lenses and intraocular lenses (IOLs). Exemplary IOL optics can include a circular surface structure which acts as a diffractive or phase shifting profile. In some cases, a single ring IOL includes an anterior face and a posterior face, where a profile can be imposed on the anterior or posterior surface or face. The profile can have an inner portion such as a microstructure or central echelette, and an outer portion. Between the inner portion and the outer portion, there may be a transition zone that connects the inner and outer portions.

An intraocular lens comprises optical part configured to be implanted in an eye of a subject. The intraocular lens further comprises at least one aspheric surface configured, in combination with a lens in the capsular bag of an eye, to reduce an aberration of a wavefront passing the eye. The aberrations may include astigmatism, coma, and / or spherical aberrations. An aberration of the intraocular lens may be expressed as a linear combination of Zernike polynomial terms that may include a Zernike coefficient a11. The Zernike coefficient a11 may be selected to reduce a spherical aberration of a wavefront passing the eye and / or to compensate for an average value resulting from a predetermined number of estimations of the Zernike coefficient a11 in a population of corneas and capsular bag lenses.

The invention provides ophthalmic lenses useful in preventing myopia progression. The lenses of the invention provide substantially constant distance vision power zone in the center of the optic zone surrounded by a zone that provides positive longitudinal spherical aberration.

A compact solar concentrator photovoltaic module assembly includes a plurality of rear contact solar cells configured in a matrix array on a substrate. The substrate is comprised of conductors laminated to an insulator sheet to form a receiver sheet. A lens sheet on which many lenses have been formed is disposed in a fixed spaced relation to the substrate and operates to focus sunlight onto the active surfaces of the PV cells. The overall thickness of the concentrator module is less than four inches thick. The receiver sheet may be assembled using standard, surface mount printed circuit board assembly techniques. The receiver sheet may have a secondary optical element and may also serve as part of the encapsulant for environmental protection.

A functional wafer of the present invention is disclosed to solve manufacturing difficulties involved in the production of optical elements such as polycarbonate ophthalmic lenses. The functional wafer may include a front layer, a functional layer, and a back layer, whereas the front layer and the back layer are bonded to the functional layer with or without additional adhesive. Said functional layer is smaller than at least the front layer by about 0.5 mm to 5 mm along the perimeter edge. A functional wafer of this construction can be conveniently and effectively incorporated into a lens through an insert injection molding process, in which said back layer will be in contact with the lens material.

Systems and methods of manufacturing ophthalmic lenses, for example, soft, extended wear silicone hydrogel contact lenses, are provided. The systems generally include a housing having an illuminated chamber, a carrier, for example a tray, movable in the illuminated chamber from an inlet portion to an outlet portion of the housing, and the tray configured to carry a plurality of contact lens molds. Polymerizing light energy is provided, for example, by multiple fluorescent lamps, to the molds at an intensity effective to at least initiate polymerization of a monomer composition located in each of the molds. The light may be illuminated onto two opposing sides of each mold. In some cases, the intensity of the light provided to one side of the mold may be different to the light intensity provided to the opposing side of the mold. In addition, the system may include features that are effective to provide for an instantaneous start and an instantaneous end to the light induced cure of the monomer in the molds. The system may include DALI protocol based technology for controlling the fluorescent lamps.

The invention provide a class of linear chain-extended polysiloxane crosslinkers which comprises two terminal ethylenically unsaturated groups, at least two polysiloxane segments, and dangling hydrophilic polymer chains each covalently attached to a divalent organic radical separating each pair of adjacent polysiloxane segments. The present invention is also related to a polymer comprising crosslinking units derived from chain-extended polysiloxane crosslinker of the invention and to ophthalmic lenses comprising such a polymer.

Photochromic diaryl-2H-naphthopyran structures, which dye photochromically well at room temperature, lighten up quickly when incorporated into ophthalmic lenses, possess longevity, and due to their spacial structures, have a reduced tendency of the molecules to migrate in plastics.

The present invention involves the prescribing and / or dispensing ophthalmic lenses, such as progressive addition lenses, for a wearer. In one form of the invention lens usage information is obtained from a wearer and entered into a programmed computer. The programmed computer processes the lens usage information to provide a separate weighted lifestyle score for each of one or more respective lifestyle score categories, such that each weighted lifestyle score is a function of a predetermined relationship between the respective lifestyle score category and at least ophthalmic lens design feature. The programmed computer then selects or designs an ophthalmic lens design using one or more of the weighted lifestyle scores such that the selected or designed ophthalmic lens has at least one lens design feature which has been customised using one or more of the weighted lifestyle scores.

The use of poly(oxyethylene)-poly(oxybutylene) block copolymers in pharmaceutical compositions useful for modifying the surfaces of contact lenses and other medical devices is disclosed. The present invention is based in-part on a discovery that this class of compounds is particularly efficient in wetting hydrophobic surfaces, such as the surfaces of silicone hydrogel contact lenses and other types of ophthalmic lenses. Such compounds are also useful for cleaning purposes. The use of the compounds as surfactants in various types of compositions for treating contact lenses therefore represents a preferred embodiment of the present invention.