137 results about "Eye corneas" patented technology

The invention relates to a method for providing control data for an ophthalmic laser (12) of a treatment device (10).The procedure comprises the following steps: determining a preoperative corneal thickness profile (24) of a cornea (16) of a human or animal eye from predetermined examination data; determining a target corneal thickness profile (26) of the cornea (16), wherein at least one corneal thickness of the target corneal thickness profile (26) is set to a predetermined corneal thickness value (28) present at at least one predetermined position of the preoperative corneal thickness profile (24); determining tissue removal data to generate the target corneal thickness profile (26), wherein in the tissue removal data only tissue (14) at positions between the preoperative corneal thickness profile (24) and the target corneal thickness profile (26) is defined as tissue (14) to be removed; and providing control data for controlling the ophthalmic laser (12), which includes the tissue removal data.

The invention belongs to the technical field of micro electro mechanical systems, and particularly relates to a non-contact type intraocular pressure visual calibration method, which comprises the following steps of: by virtue of a human eye simplified AI model and an intraocular pressure deformation quantity detection device, combining an MEMS (Micro Electro Mechanical System) technology and a visual analysis theory, carrying out real-time and dynamic simulation on the human eye pressure, and carrying out data acquisition by an optical or image sensor; therefore, accurate monitoring of cornea deformation is realized, a more accurate intraocular pressure evaluation means is provided, and effective verification of the non-contact tonometer is realized. Compared with the prior art, the system has the beneficial effects that data acquisition is carried out by means of an optical sensor or an image sensor and the like, accurate monitoring of cornea deformation can be realized, an integration technology is adopted, cornea deformation quantity calculation and an analysis algorithm are integrated in the MEMS sensor, accurate monitoring of human cornea pressure can be realized, and the system is suitable for popularization and application. And dynamic monitoring can be realized.

A method of lamellar corneal graft implantation is disclosed herein. The method includes the steps of: (i) forming one or more intrastromal incisions in a cornea of an eye of a patient; (ii) removing a cut portion of the cornea defined by the one or more intrastromal incisions from the eye of the patient; (iii) applying laser energy to a lamellar corneal graft using an excimer laser so as to modify the refractive power of the lamellar corneal graft, the lamellar corneal graft being in the form of a autologous corneal graft or a homologous corneal graft; and (iv) implanting the lamellar corneal graft into the eye of the patient in a location previously occupied by the cut portion of the cornea so as to correct the refractive power of the eye of the patient.

A device and method for early detection of eye disease including a corneal topography device including a camera, such as a rotating Scheimpflug camera, configured to measure the elevation of a patient's two anterior corneas sequentially or simultaneously; a computer processor; and non-transitory computer readable media including computer readable instructions, which, when executed by the computer processor, causes the device to measure and store elevation data at a plurality of points on the patient's anterior corneal surfaces; organize the elevation data for each cornea into a two-dimensional matrix where the center of the cornea is in the center of the data frame, rotate the data for a first eye 180 degrees around the Y axis relative to a second eye, subtract data on each corresponding corneal point, and generate an elevation difference matrix showing the degree of symmetry or asymmetry between the patient's left and right eye corneal topography.

A system for a full-field OCT eye measurement, comprising:—a source (1) of a light beam (2),—a detector (3), preferably in form of a camera,—an interferometer, comprising a reference arm (4) and a sample arm (5),—a beam splitter (6), configured to receive the light beam (2) and to split the light beam (2) into a sample beam (7) and a reference beam (8) and further configured to direct the sample beam (2) to the sample arm (5) and the reference beam (8) to the reference arm (4) respectively, wherein the sample arm (5) is configured for guiding the sample beam (7) through a point on the cornea of a subject's eye (9) into the subject's eye (9) and back to the detector through the beam splitter (6), wherein the reference arm (4) is configured for guiding the reference beam (8) to a mirror (10) and back to the detector (3) through the beam splitter (6), wherein said detector (3) is configured and programmed for comparing the sample beam (7) and the reference beam (8) for detecting diseases of the subject's eye (9). The system is characterized in that it comprises an arrangement for decreasing the intensity of the sample beam (7) passing through the point of the cornea of the subject's eye (9).

A ophthalmic laser-assisted corneal lenticule extraction procedure that uses wavefront measurements to guide the formation of the corneal lenticule. The wavefront map measured from a free eye using a wavefront aberrometer is registered to the cornea of a docked eye based on comparisons of iris images and corneal markings. The docked-eye cornea-registered wavefront map is then corrected to be consistent with the Munnerlyn formula for the spherical power, and adjusted for any physician adjustments and / or myopia error due to a flat add in the lenticule, using Zernike polynomials. The corrected and adjusted wavefront map is then used to calculate the profiles of the bottom and top lenticule incisions in the applanated cornea, where higher-order components in the wavefront map are distributed to the bottom lenticule incision alone and lower-order components in the wavefront map are distributed to both the bottom and the top lenticule incision.

A UV-laser-based system (UVL-LVC system) for correcting the impaired vision of a patient's eye has a UV-laser source, which emits laser radiation to treat the patient's eye, and imaging optics for focusing the laser radiation onto the cornea of the patient's eye. The imaging optics allow a detection of a reflection of radiation, which is emitted onto the cornea of the patient's eye with the imaging optics and is at least partly reflected by the cornea of the patient's eye back into the imaging optics at an acceptance angle χMax of at least 2.5°. Additionally a method for centering a UVL-LVC system is disclosed.

The invention discloses a corneal endothelial cell meter light path system and a corneal endothelial cell meter, and relates to the technical field of ophthalmology medical equipment.The corneal endothelial cell meter light path system comprises a first optical branch, a first auxiliary branch, a second optical branch and a second auxiliary branch; the first optical branch is used for corneal endothelial cell imaging; the first auxiliary branch and the first optical branch are symmetrically arranged, and the first auxiliary branch is used for providing a light source when the first optical branch is used for corneal endothelial cell imaging; the second optical branch is used for measuring the cornea thickness; and the second auxiliary branch is used for assisting the second optical branch in measuring the cornea thickness and positioning the Z axis of the human eye. According to the technical scheme, the optical path system of the corneal endothelial cell meter can be used for imaging the cornea and measuring the thickness of the cornea through optical path arrangement of the first optical branch, the first auxiliary branch, the second optical branch and the second auxiliary branch, the cornea and the thickness of the cornea do not interfere with each other and can be measured at the same time, and the optical path system is low in installation and adjustment difficulty and easy to develop.

Glaucoma can be treated by implanting an intraocular shunt in the eye. The implantation can be performed by first determining an entry area below a corneal limbus of an eye. Thereafter, the intraocular shunt can be inserted into eye tissue through the entry area such that an inflow end of the shunt is positioned in the anterior chamber of the eye and an outflow end of the shunt is positioned between layers of Tenon's capsule.

The invention relates to a method for providing control data for an ophthalmic laser (12) of a treatment device (10), wherein the method comprises the following steps performed by a control unit (18): receiving anatomical data relating to the anatomy of a cornea (16) of an eye to be treated; determining the position of the corneal nerve plexus (24) in the cornea (16) based on the anatomical data of the cornea (16) to be treated; determining the depth distribution of the corneal nerve plexus (24) in the cornea (16); receiving cutting instructions for performing a cut (26) in the cornea (16) by the ophthalmic laser (12) of the treatment device (10); Determining a target depth (28) for the laser (12) to perform the cut (26) based on the cut specifications and the depth distribution of the corneal nerve plexus (24) according to a specified cut depth specification;and generating control data for controlling the ophthalmic laser (12) to perform the cut (26) in the cornea (16).;

The invention belongs to the technical field of eye care, and provides vitamin B12-containing contact lens lubricating eye drops and a preparation method thereof, and the vitamin B12-containing contact lens lubricating eye drops comprise 0.5 to 0.7 part of sodium hyaluronate, 0.18 to 0.23 part of a tackifier, 0.3 to 0.35 part of polyvinyl alcohol, 1.1 to 1.2 parts of soybean phospholipid, 0.2 to 0.3 part of sodium cromoglycate, 0.7 to 0.9 part of vitamin B12, 0.005 to 0.01 part of borneol, 0.1 to 0.15 part of a surfactant, 0.1 to 0.18 part of a sodium chloride solution, 0.3 to 0.4 part of tiloxamer and 80 to 90 parts of water. The sodium hyaluronate and the polyvinyl alcohol have moisturizing and thickening effects, the sodium cromoglycate can effectively diminish inflammation and kill viruses, and conjunctivitis and other eye diseases are avoided; vitamin B12 can moisten corneas and relieve eye fatigue. Through cooperative use of the raw materials, the effects of moistening eyes, diminishing inflammation and relieving are achieved.

1. Name of the designed product: corneal topographer. 2. Use of the designed product: the designed product is used for measuring the curvature distribution of the cornea of the eye, for fitting and wearing period analysis of corneal contact lenses. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: front view. 5. Uncommon views, omit bottom view.

An eye tracking device for integrating in a frame for mounting to a user's head includes a laser output unit for fixing to the frame. The laser output unit is configured to provide a laser beam for illuminating a cornea of the user's eye when in use. The eye tracking device also includes a receiver unit for fixing to the frame. The receiver unit is configured to receive a reflection of the laser beam and to provide a tracking signal usable for determining a distance or velocity of the cornea. The eye tracking device further includes a processing unit for determining a rotation of the user's eye from the tracking signal.

A corneal inlay and pinhole lens structure for implantation into a cornea of an eye is disclosed herein. In one embodiment, a corneal inlay for implantation into a cornea of an eye includes an inlay body formed from natural tissue of a donor cornea; and a central pinhole disposed in the inlay body, the central pinhole being surrounded by a darkened bounding wall. In another embodiment, a pinhole lens structure includes an insertable pinhole body defining a through pinhole of approximately 0.9-2.0 mm in diameter with a surrounding darkened wall having an approximately 0.1-1 mm wall thickness, the insertable pinhole body configured to be inserted into a corneal pocket in a cornea of an eye.

Disclosed are various systems and methods of using interferometry to measure the tear film for disease prediction and treatment. A point-by-point scan of a corneal surface of an eye is obtained from an interferometry system, including at least an interference signal. Next, a large field-of-view of the corneal surface is obtained from an objective lens with a curved focal plane matched to a curvature of the corneal surface. Subsequently, motion correction is performed on the point-by-point scan. Then, noise is filtered from the interference signal. A tear film lipid layer signal and a precorneal tear film signal are separated from the filtered interference signal. Later, a best fit frequency for the tear film lipid layer signal and the precorneal tear film signal are determined. Then, a thickness of the tear film lipid layer and the precorneal tear film are determined based at least in part on the best fit frequency.

Micro-droplet delivery devices and methods are described where the device may comprise a piezoelectric actuator having a piezoelectric chip that is operatively coupled to a drug package under a preloading force. The actuator is configured to generate an acoustic pressure within the drug package to dispense droplets of an agent from an aperture, e.g., to the corneal surface of the eye. The piezoelectric actuator can be coupled or decoupled from the drug package.

The application belongs to the technical field of ophthalmic medical instruments, and provides a corneal topography measurement method, an instrument, an electronic device and a program product, the corneal topography measurement method obtains the corneal diameter and the corneal vertex of the eye cornea of a detected object; determines the distance between the corneal vertex and the vertex of a Placido disc, determines the eccentricity of the Placido disc; determines the shape of the Placido disc according to the eccentricity of the Placido disc, and determines the ring number of the Placido disc according to the corneal diameter; collects the corneal topography imaging after the concentric ring on the Placido disc is reflected on the corneal surface of the detected object; based on the shape and the ring number of the Placido disc, analyzes a plurality of concentric rings contained in the corneal topography imaging, and obtains the corneal topography data of the detected object. The accuracy of measuring the corneal topography is improved, so that the micro-landscape features of the corneal surface can be more accurately obtained.

The invention discloses a method for preparing silk fibroin contact lenses based on natural silk. The method comprises the following steps: degumming natural silk with potassium hydroxide solution and then dissolving the silk fibroin solution with lithium bromide; dialyzing the silk fibroin solution and mixing it with acrylamide, then dripping the solution into a contact lens mold, and air-drying the solution to obtain a lens. The method solves the technical problems of poor air permeability of contact lenses in the prior art, and long-term wearing of the contact lenses may lead to corneal hypoxia, redness, swelling, pain, dryness and even decreased vision of the eyes.

The utility model relates to the technical field of eye protection patches, in particular to an eye protection patch for eyes, which is characterized in that a liquid dropping area is arranged in the middle of the front side of the eye protection patch, a plurality of through holes are formed in the surface of the liquid dropping area, sponge is fixedly mounted in the middle of the back side of the eye protection patch, and a bonding layer is arranged on the surface of the back side of the eye protection patch; according to the eye protection patch, the eye protection patch can be pasted around the eyes through the pasting layer, the sponge corresponds to the eyelid part, therefore, the eyes of a patient can be protected, damage can be prevented, meanwhile, normal saline can be dropped into the liquid dropping area, the normal saline can permeate into the sponge through the through holes, and therefore the eye protection patch is convenient to use. According to the eyelid protection device, the sponge is arranged, normal saline adsorbed in the sponge can moisten the eyes of a patient, cornea injury caused by dryness is reduced, meanwhile, through contact between the sponge and the eyelid, eyelashes on the eyelid can be prevented from being injured by viscous substances on the sticking layer, and hair follicles of the patient can be prevented from being injured.

Methods and systems for dry eye analysis using terahertz (THz) radiation. The method includes projecting a THz wave onto a surface of an eye and detecting a reflected wave being a reflection of the THz wave reflected from the surface of the eye. The method further includes analysing properties of the eye in response to the THz wave reflected from the surface of the eye, the properties of the eye including thickness of the eye's cornea and ambient tissues, and analyzing the properties of the eye comprises measuring the thickness of the cornea and / or the ambient tissues and / or measuring an amount of chemical components of one or more of the eye's layers.

The invention relates to the technical field of medical instruments, in particular to a cornea wetting device for cataract surgery, which comprises a shell and an injector arranged on one side of the shell, and also comprises a dropper arranged in the shell, the dropper is communicated with the injector, and the injector is filled with wetting liquid; the shaft I is rotationally arranged in the shell and is fixed with one end of the dropper; the device has two operation modes, one operation mode is that a medical worker continuously pushes the injector, then the dropper is deflected out through the deflection assembly to be aligned with the cornea of a patient, and then a large amount of wetting liquid is flushed out through the dropper to conduct continuous flushing operation on the eyes of the patient, and the other operation mode is that in the operation process of the medical worker, the operation efficiency is greatly improved. When the eye wetting device is used, the injector is pushed once, the injection barrel is filled with the wetting liquid, meanwhile, the dropper is driven to deflect out, the piston in the injection barrel moves automatically subsequently, the wetting liquid is squeezed out of the dropper to wet the eyes of a patient, and the eye wetting device is convenient to use and practical.

An ophthalmic composition or dosage form can include a therapeutically effective amount of a copper-containing agent that is sufficient to increase corneal lysyl oxidase activity in an eye of a subject in an amount sufficient to treat myopic progression and a pharmaceutically acceptable carrier. The composition or dosage form can be used to treat or prevent progression of myopia by administering a therapeutically effective amount of the composition to an eye of a subject during a treatment period.

A corneal topographic map reconstruction system relates to the technical field of corneal measurement and comprises a first scanning unit and a second scanning unit, the first scanning unit is composed of a laser, an MEMS micromirror and a photoelectric sensor, the laser is used for emitting a laser beam to the MEMS micromirror, the MEMS micromirror is used for reflecting the laser beam to a human cornea, and the photoelectric sensor is used for transmitting the laser beam to the second scanning unit. The second scanning unit is composed of a TOF sensor and a receiver, the TOF sensor is used for emitting a laser beam to the cornea of a person and positioning and measuring a scanning light beam emitted by the MEMS micromirror, micromirror scanning, TOF distance measurement and a computer are combined, during use, the micromirror is used for high-resolution scanning of a Lissajous track, and the laser beam emitted by the MEMS micromirror is positioned and measured. According to the corneal topography measuring device, the distance is accurately measured by means of the TOF sensor, corneal data of a patient can be effectively collected and transmitted to the computer in a non-contact collecting mode, and then the computer generates a detailed corneal topography map according to the data.

The invention relates to a method for providing control data for an ophthalmological laser (12) of a treatment apparatus (10) as well as to an surgical procedure, wherein the method comprises the following steps performed by at least one control device (18): Presetting a course of a Bowman's membrane (34) of a cornea of an eye (14) of a patient depending on at least one patient information; determining an incision course at least for an anterior interface (20) of a volume body (16) to be removed in a stroma (36) of the eye (14) depending on the course of the Bowman's membrane (34) such that a preset geometric relation to the Bowman's membrane (34) is formed by the anterior interface (20); and generating the control data for controlling the laser (12) by means of the control device (18) such that it emits pulsed laser pulses in a shot sequence onto the eye. Further, the invention relates to a control device (18), to a treatment apparatus (10), to a computer program as well as to a computer-readable medium.

The utility model relates to a device for implanting corneal endothelium. The device comprises an injector, an implanting box and a spine section, an endothelial implant is placed in the implantation box; the spine section is fixedly connected to one side of the implantation box and enables the implantation box to enter an eye anterior chamber to-be-implanted area through puncture; the injector is located on one side of the exterior of the implantation box, and the injector is communicated with the interior of the implantation box so as to inject gas into the implantation box; and the implantation box is provided with an anti-curl structure which is used for flattening the endothelial implant and implanting the endothelial implant into the to-be-implanted area of the anterior chamber of the eye after the injector injects gas. The endothelial implant flattening device has the beneficial effects that the endothelial implant does not need to be flattened by an instrument after being implanted, so that the harm to a patient caused by the flattening operation of the endothelial implant is avoided.

A model eye for examining the resolution of a fundus examining device includes one or more lenses corresponding to a cornea and / or a crystalline lens of an eye; and a chart unit located at an inner rear surface of the model eye corresponding to a fundus of an eye, and including two or more chart plates each having one or more resolution test chart for examining resolution of a fundus examining device. The chart plates are arranged at different positions so that the resolution test charts are located at the focal distances of the measurement lights of the fundus examining device which incident to a central region and peripheral region of the inner rear surface of the model eye through the lenses.

The utility model belongs to the technical field of ophthalmic surgical instruments, and particularly relates to a multifunctional cornea foreign matter remover which comprises a forceps handle, one end of the forceps handle is fixedly connected with a first forceps arm and a second forceps arm which are oppositely arranged, and the inner side wall of the end, close to the forceps handle, of the first forceps arm is provided with a first weight reduction part. The outer side wall of the end, close to the tweezers handle, of the first tweezers arm is provided with a first anti-skid part, the end, away from the tweezers handle, of the first tweezers arm is fixedly connected with one end of a first tweezers head, the inner side wall of the other end of the first tweezers head is fixedly connected with a clamping part, and the outer side wall of the other end of the first tweezers head is fixedly connected with a cleaning part. A second weight reduction part is arranged on the inner side wall of one end, close to the tweezers handle, of the second tweezers arm, a second anti-skid part is arranged on the outer side wall of one end, close to the tweezers handle, of the second tweezers arm, one end, away from the tweezers handle, of the second tweezers arm is fixedly connected with one end of a second tweezers head, and an auxiliary clamping part is fixedly connected to the inner side wall of the other end of the second tweezers head and matched with the clamping part. The convenience and safety of cornea foreign body removal are improved, and a rust ring is conveniently scraped.

An ophthalmic apparatus includes a tester having a target projecting optical system and a target photographing optical system. with a configuration on an examinee's eye side being non-telecentric, an alignment adjuster that adjusts at least a positional relationship between an examinee's eye and the tester in the direction of a working distance between the examinee's eye and the tester, and a corrector that acquires an actual error from a proper working distance based on association information indicating the association of position information on the positions of first and second target images on an observation image with an error in the working distance with respect to the proper working distance due to the corneal curvature radius of the examinee's eye and the non-telecentricity of the target photographing optical system and the position information on the tester at the current position thereof in the working distance direction, correcting the actual error.

Method for providing control data for a laser (18) of a treatment device (10) for the correction of a cornea (26) of a human or animal eye, the method comprising the following steps carried out by a control device (20): - determining (S10) a corneal geometry of the eye from predetermined examination data, wherein the corneal geometry comprises at least an anterior corneal curvature; - determining (S12) a correction to be achieved, wherein an anterior and a posterior boundary surface (14, 16) of a lenticule (12) of the cornea (26) are determined by the correction to be achieved; - determining (S14) a deformed cornea (26) that is expected due to the removal of the lenticule (12) from the cornea (26) by means of a corneal deformation model that is determined based on the Euler-Bernoulli beam theory, wherein in the corneal deformation model the cornea (26) with the determined corneal geometry is described by a solid body, wherein the solid body is formed from respective central corneal surfaces (34, 36) between an anterior corneal surface (30) and a posterior corneal surface (32), and to determine the deformed cornea, a closure of a region between the anterior (16) and the posterior boundary surface (14) of the lenticule (12) is modeled in the solid body, thereby changing the curvatures of the central corneal surfaces (34, 36) and the anterior corneal curvature; - determining (S16) a deformation correction value by means of the deformed cornea (26) of the corneal deformation model, which indicates which correction is achieved according to the deformed cornea; - Adjusting (S18) the correction to be achieved depending on the determined deformation correction value, - Providing (S20) the control data for controlling the laser (18) which have the adjusted correction to be achieved.

A ophthalmic laser-assisted corneal lenticule extraction procedure that uses wavefront measurements to guide the formation of the corneal lenticule. The wavefront map measured from a free eye using a wavefront aberrometer is registered to the cornea of a docked eye based on comparisons of iris images and corneal markings. The docked-eye cornea-registered wavefront map is then corrected to be consistent with the Munnerlyn formula for the spherical power, and adjusted for any physician adjustments and / or myopia error due to a flat add in the lenticule, using Zernike polynomials. The corrected and adjusted wavefront map is then used to calculate the profiles of the bottom and top lenticule incisions in the applanated cornea, where higher-order components in the wavefront map are distributed to the bottom lenticule incision alone and lower-order components in the wavefront map are distributed to both the bottom and the top lenticule incision.