1072 results about "Ophthalmology department" patented technology

It is possible to estimate optical characteristic according to a pupil diameter in daily life of an examinee, correction data near to the optimal prescription value, eyesight, and sensitivity. A calculation section receives measurement data indicating refractive power distribution of an eye to be examined and pupil data on the eye and calculates lower order and higher order aberrations according to the measurement data and the pupil data (S101 to 105). For example, a pupil edge is detected from the anterior ocular segment image and a pupil diameter is calculated. By using this pupil diameter, lower order and higher order aberrations are calculated. According to the lower order and higher order aberrations obtained, the calculation section performs simulation of a retina image by using high contrast or low contrast target and estimates the eyesight by comparing the result to a template and/or obtains sensitivity (S107). Alternatively, according to the lower order and the higher order aberraations obtained, the calculation section calculates an evaluation parameter indicating the quality of visibility by the eye to be examined such as the Strehl ratio, the phase shift (PTF), and the visibility by comparison of the retina image simulation with the template. According to the evaluation parameter calculated, the calculation section changes the lower order aberration amount so as to calculate appropriate correction data for the eye to be examined (S107). The calculation section outputs data such as the eyesight, sensitivity, correction data, and the simulation result to a memory or a display section (S109).

An electro-active ophthalmic lens includes an electromyography sensor, a processor, and an electro-active optical element. The electromyography sensor is configured to detect an electric field in a ciliary muscle of the eye that is proportional to a force exerted by the ciliary muscle and to generate a sensor signal indicative of the electric field. The processor is operable to receive the signal from the electromyography sensor and to determine, based on the sensor signal, an adjustment to optical power for an electro-active optical element and to generate a control signal for the electro-active optical element. The electro-active optical element is operable to receive the control signal and to change an optical power of the electro-active optical element in response to the control signal.

The invention provides a cost-effective and in-situ method for applying an LbL coating onto a silicone hydrogel contact lens directly in a lens package. The resultant silicone hydrogel contact lens has a coating with good hydrophilicity, intactness and durability and also can be used directly from the lens package by a patient without washing and/or rising. In addition, the invention provides a packaging solution for in-situ coating of a silicone hydrogel contact lens in a lens package and an ophthalmic lens product.

An ophthalmic surgical microscope comprises: an observation optical system for observing a patient's eye during surgery; a corneal shape measuring unit for measuring a corneal shape of the patient's eye placed in a surgical position; and a controller configured to output guide information for guiding a surgery with an intraocular lens based on a measurement result obtained by the corneal shape measuring unit to an output device.

A method for making, storing and using a surgical graft from equine amniotic membrane in veterinary ophthalmology. The amniotic membrane is obtained from equine placenta, from which the chorion has been separated. Sheets of the amniotic membrane are cut to size and mounted on filter paper. The cells of the amniotic membrane are killed, preferably while being frozen and thawed in the storage solution. The equine amniotic membrane can be used in a variety of ocular surgeries in horses but also other species such as food animals, dogs and cats. It represents a strong biomaterial that will give a good physical support to the ocular tissues while inducing a minimal amount of scarring which is primordial in ocular surgeries in order to obtain the best visual outcome.

The present invention relates generally to the restoration or improvement of the quality of human vision and, more particularly to a self-adapting system and method for achieving automatic sharp vision by the human eye of objects for instance at distances between 25 cm and more than 10 meters away. The invention can be situated in at least four technological domains: 1. ophthalmology, in particular the implantation of intraocular lenses. 2. Non-contact biometric signal recording and processing. 3. Electro-optic control of refractive lens power. 4. Wireless energy transfer.

An optical wavefront correction plate incorporates a unique, three-dimensional spatial retardation distribution utilizing the index of refraction change of resin mixture in its cured state. The optical wave plate comprises a pair of transparent plates, containing a layer of a monomers and polymerization initiators, such as resin mixture. This resin mixture exhibits a variable index of refraction as a function of the extent of its curing. Curing of the resin mixture may be made by exposure to light, such as ultraviolet light, and may be varied across and through the surface of the resin mixture to create a particular and unique three-dimensional wavefront retardation profile. The optical wave plate provides improved performance in large area mirrors, lenses, telescopes, microscopes, and ophthalmic diagnostic systems.

An improved ophthalmic imaging instrument including a wavefront sensor-based adaptive optical subsystem that measures phase aberrations in reflections derived from light produced by an imaging light source and compensates for such phase aberrations when capturing images of reflections derived from light produced by the same imaging light source. The high-resolution image data captured by the improved ophthalmic imaging instrument can be used to assist in detection and diagnosis (such as color imaging, fluorescein angiography, indocyanine green angiography) of abnormalities and disease in the human eye and treatment (including pre-surgery preparation and computer-assisted eye surgery such as laser refractive surgery) of abnormalities and disease in the human eye.

A method for designing ophthalmic lenses, including progressive addition lenses, and lenses produced by the method are provided. The method permits the direct correlation of an individual's subjective assessment of the lens' performance and the objective measure of lens performance relative to the individual. The method permits generation of lens designs based on the head and eye movement of the individual and the designing of customized lenses.

Disclosed is a progressive ophthalmic lens including a front surface and a rear surface, each surface having in each point an altitude, a mean sphere value and a cylinder value, the front surface of the lens including: —a far vision zone having a far vision reference point; —a near vision zone having a near vision reference point; —a main meridian, wherein the front surface is regressive and has: —a sphere gradient normalized value of less than 7.50·10⁻¹ mm⁻¹ at any point in a central portion of the lens including a portion of the main meridian (32), the far vision reference point (FV) and the near vision reference point (NV); —a cylinder gradient normalized value of less than 1.45 mm⁻¹ at any point in the central portion of the lens.

The invention discloses a porous calc silicate bioceramic material, a preparation method and application. The porous bioceramic material comprises the following components in an oxide form in percentage by weight: 44 to 52 percent of CaO, 47 to 54 percent of SiO2, 0 to 3.0 percent of B2O3, 0 to 3.4 percent of ZnO and 0.2 to 4.8 percent of MgO, wherein the content of B2O3 and ZnO is not simultaneously 0; the ratio of the content of MgO and the content sum of B2O3 and ZnO is 1:(0.2-5). The preparation method comprises the following steps: preparing boron, zinc and magnesium-containing calc silicate superfine powder by using a wet-chemical method and a sol-gel method, preparing a porous material of which the shape is consistent with that of a skeleton of each part of a human body and the pore passage size is 80 to 800[mu]m by using a three-dimensional printing technology, and performing high-temperature sintering treatment. The material can be applied to the bone defect repair and bone regeneration medicine of the department of orthopedics, department of stomatology, plastic surgery, maxillofacial surgery, thoracic surgery department or ophthalmology department.

The invention discloses a multifunctional measuring apparatus for the ophthalmology department. The multifunctional measuring apparatus for the ophthalmology department comprises an OCT system light source, an optical fiber coupler, a detection system, a control system, a sample arm component, a reference arm assembly and an optical length compensation module. The optical length compensation module is matched with eye anterior and posterior segment scanning member to change the optical length of an OCT system so that OCT images of different portions of the human eyes can be formed and OCT imaging switching between the portions can be achieved. The invention further discloses a method for testing different portions of the human eyes through the apparatus. The method includes the steps that an optical path system for OCT imaging of different portions of the human eyes is arranged, and the system comprises the optical length compensation module; the optical length compensation module is sequentially placed on a principal optic axis of an OCT imaging optical path, and OCT imaging of different portions of the human eyes can be achieved by changing the optical length. Through the multifunctional measuring apparatus for the ophthalmology department and the method for testing different portions of the human eyes, numerous parameter data of the human eyes can be obtained through one measurement, working efficiency is improved, and cost is reduced.

This invention is generally related to vision corrections by means of multifocal ophthalmic lenses or by means of corneal refractive surgery. In particular, the present invention provides a multifocal contact lens, a multifocal intraocular lens, a method for making a multifocal ophthalmic lens (contact lens and intraocular lens), and a method of correcting presbyopia by reshaping the cornea of an eye.

A portable ocular response testing device includes a portable housing, a plurality of lights for generating visible light within two eye spaces of the portable housing, a controller for operating the lights according to a prescribed pattern, and an imaging system to capture images of the eyes under varying lighting conditions to evaluate an ocular response of a user to the lighting conditions. In some instances, the portable device is used in the field of ophthalmology for complete assessment of optic nerve defects producing Marcus-Gunn pupil, detection and quantification of color blindness, and detection and follow up of eye abnormalities. In other instances, the device is adapted for screening of driving under influence (DUI) or Driving While Intoxicated (DWI) by performing multiple eye tests resulting in field screening of DUI or DWI cases.

The invention belongs to the field of medical apparatuses and instruments and particularly discloses a human eye test model for evaluating the three-dimensional imaging performance of OCT equipment of the ophthalmology department and a use method of the human eye test model. A simulated human eye is provided with key parts of imaging of the ophthalmology department, wherein the key parts include the cornea (2), the atria (3), the crystalline lens (5), the vitreous body (7) and the retina (8). An OCT resolution test pattern (9) and a view marking ring (10) are designed and distributed on the surface of the retina. The OCT resolution test pattern (9) includes two parts. One part of patterns are used for evaluating the OCT transverse resolution, all sets of patterns are the same in height, each set of pattern is composed of three short lines in the horizontal direction and three short lines in the vertical direction on the two-dimensional plane, and the lengths of the short lines gradually decrease; the other part of patterns are used for evaluating the OCT axial resolution, each set of pattern is a square on the two-dimensional plane, the length and the width of each square are the same, but the heights of the squares gradually decrease. The human eye test model is designed and manufactured according to the imaging principle of the OCT equipment, and the three-dimensional resolution performance of the OCT equipment can be evaluated by carrying out measurement and imaging on the simulated human eye.

A method of treating of a lens forming surface (2) of at least one mold half (1) of a mold for molding an ophthalmic lens, in particular of the lens forming surface of a glass mold half for molding a contact lens, especially a soft contact lens, includes the steps of:

• • providing a plasma (10) under atmospheric pressure, and
  • exposing the lens forming surface (2) to the plasma (10) under atmospheric pressure thereby hydrophilizing the lens forming surface (2) without depositing any material on the lens forming surface (2).

Silicone containing reactive monomers with hydrophilic end-groups of formula I useful in the manufacture of biocompatible medical devices are disclosed, wherein R₁ is H or CH₃, a is 0 or 1, p is an integer from 1 to 6, q is an integer from 1 to 3 and for each q, the end groups R₅₁, R₅₂, R₅₃ are independently an alkyl, alkyl ether, trimethylsiloxy group, or a substituted or non-substituted aromatic group and at least one of them has a hydrophilic group attached, preferably to the terminal end of R₅₁, R₅₂, R₅₃, X is O or NR₅₄, where R₅₄ is H or a monovalent alkyl group with 1 to 4 carbons, n is an integer from 1 to 100, R₂ and R₃ are independently an alkyl, alkyl ether, or a substituted or non-substituted aromatic group, preferred R₂ and R₃ include methyl, ethyl, and phenyl, L is a divalent linker comprising substituted and unsubstituted alkylene groups having 1-14 carbon atoms, which may be straight or branched, substituted and unsubstituted alkoxy groups having 2-12 carbons, polyethers, oxazolines, and substituted and unsubstituted heterocyclic groups. Suitable substituents include aryl, amine, ether, amide, hydroxyl groups, combinations thereof and the like. In another embodiment, L comprises a straight or branched alkylene group having 2 to 12 carbons. The reactive monomers combine oxygen permeable silicone components with hydrophilic terminal groups capable of reaching to the device-bio-logic interface thus providing bulk and surface characteristics useful in the manufacture of medical devices, particularly ophthalmic devices.

An automated lens inspection system that images the edge and surface of an ophthalmic lens transmits light through the ophthalmic lens to a camera to create a complete digital image of the lens edge or lens surface. The digitized image(s) is(are) analyzed to detect defects or abnormalities of the ophthalmic lens. Methods of inspecting ophthalmic lenses are also disclosed.