96 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.

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 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 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.

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.

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.

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.

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.

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.

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.

An anterior chamber maintainer (ACM), which is to be utilized in connection with maintaining physiological intraocular pressure during intraocular surgery, is disclosed and comprises an axially elongated tubular member which is adapted to be fluidically connected at a first end to a supply of balanced salt solution (BSS) for introduction into the anterior chamber of an eye so as to maintain adequate intraocular pressure while performing any intraocular surgery. A second opposite end of the anterior chamber maintainer (ACM) is provided with a sharply pointed end for insertion through a paracentesis incision formed within the limbus region of the eye, and a non-deformable, incompressible, tapered, annular bulbous portion is interposed between the first and second ends such that as the second end passes through the paracentesis incision, the non-deformable, incompressible, tapered, annular bulbous portion will cause the paracentesis incision to deform or expand radially outwardly, and after passing through the paracentesis incision, the non-deformable, incompressible, annular bulbous portion will trap the anterior chamber maintainer (ACM) within the anterior chamber of the eye.

In certain embodiments, a surgical contact lens system for ophthalmic treatment with a laser beam includes a patient contact lens and a surgical contact lens. The patient contact lens reduces one or more refractive errors of the eye and has a concave surface and a convex surface. The concave surface is to be disposed outwardly from a cornea of an eye. The surgical contact lens has an eye end to be disposed outwardly from the convex surface of the patient contact lens. The surgical contact lens includes a frame and an optical component coupled to the frame. The patient contact lens reduces pressure from the surgical contact lens to reduce corneal folding of a posterior surface of the cornea. The optical component of the surgical contact lens and the patient contact lens transmit the laser beam to treat the eye.

Disclosed herein is a method of alleviating symptoms of ocular surface discomfort, the method comprising: topically applying a cold slurry adjacent to a corneal limbus of an eye of a patient, wherein the cold slurry comprises water and a freezing point depressant, wherein the topical application of the cold slurry is configured to cause a degree of numbing of a cornea of the eye for a period of time, and wherein an ocular sensation of the eye is restored following the period of time.

The utility model discloses a negative pressure adsorption system, which is respectively connected with a negative pressure adsorption interface and a cornea through a first gas circuit and a second gas circuit, realizes the adjustment of the negative pressure degree through an electromagnetic valve, thereby reducing the discomfort of a patient, and in addition, can realize the accurate control of the adsorption force of the cornea through a proportional valve. And the operation effect and precision are improved.

The utility model relates to a high-frequency ultrasonic coining device for in-vivo cornea biomechanical measurement. The high-frequency ultrasonic coining device comprises a base, a lifting platform, a cantilever, a driving mechanism, a mechanical sensor, an ultrasonic transducer and a coining testing head, a lifting platform is arranged on the base, the output end of the lifting platform is connected with one end of a cantilever, a driving mechanism is mounted at the other end of the cantilever, a mechanical sensor is mounted on the driving mechanism, an ultrasonic transducer is mounted at the detection end of the mechanical sensor, and a coining test head is mounted at the output end of the ultrasonic transducer. According to the high-frequency ultrasonic coining device for in-vivo cornea biomechanical measurement, the coining testing head is aligned with the center of the cornea of a patient through the lifting table, the driving mechanism drives the coining testing head to coining the eyeball of the patient, and the ultrasonic transducer transmits ultrasonic waves and pressure to the cornea of the patient through the coining testing head and detects echo data; the mechanical sensor detects data of external pressure borne by eyeballs of a patient, and therefore reference data are provided for diagnosis and treatment of ophthalmic diseases.

Method for providing control data for an ophthalmic surgical laser (18) of a treatment device (10), wherein the method comprises the following steps performed by a control device (20): - Determining at least one cross-sectional area (14, 16) in a cornea (26) of a human or animal eye (30), - Defining an incision path (17, 17') which extends from an outer surface of the cornea (26) to at least one of the cut surfaces (14, 16), wherein the incision path (17, 17') has at least two sections (17a, 17b, 17c) with different slope values ​​between the outer surface and the respective cut surface (14, 16), and wherein the incision path (17, 17') terminates at an obtuse angle in the respective cut surface (14, 16), - Providing control data for controlling the ophthalmic surgical laser (18) which includes at least the defined incision path (17, 17'), wherein a path profile with a minimum area is calculated in a cross-section along the optical axis of the eye to define the incision path (17, 17').

The present invention discloses a method, device, terminal and medium for intelligent identification of strabismus based on eye images. Compared with the prior art, the information of the pupil area and the corneal reflection point is extracted through an eyeball segmentation network, so as to obtain the monocular corneal reflectivity; a random forest model makes a voting decision based on the monocular corneal reflectivity, the pupil area and the information of the corneal reflection point to obtain a first prediction result; a deep feature extraction network extracts deep features reflecting the strabismus state and combines with the monocular corneal reflectivity to obtain a second prediction result, and the above prediction results are weighted and averaged to obtain the human eye strabismus recognition result. Therefore, by analyzing the eye images, the state of the human eye can be simply and accurately identified, and it is found that there may be a strabismus problem in the eyes, so as to timely remind the user to go to the hospital for diagnosis and treatment.

The application belongs to the technical field of micro electro mechanical system, and particularly relates to a non-contact intraocular pressure visual calibration method, which is simplified by means of an AI model of human eyes and an intraocular pressure deformation variable detection device, combined with MEMS technology and visual analysis theory, and realizes accurate monitoring of corneal deformation by real-time and dynamic simulation of human eye pressure, data collection by optical or image sensors, provides a more accurate intraocular pressure evaluation method, and realizes effective verification of a non-contact tonometer. Compared with the prior art, the application has the beneficial effects that: the application can realize accurate monitoring of corneal deformation by means of optical or image sensors for data collection, can realize accurate monitoring of human corneal pressure by integrating corneal deformation variable calculation and analysis algorithms in MEMS sensors through integrated technology, and can realize dynamic monitoring.

The present solution can temporarily impart the handling characteristics of corneal stroma to the otherwise very thin, flimsy, coiling, and fragile Descemet membrane endothelial keratoplasty (DMEK) tissue during its insertion into the anterior chamber and positioning in apposition against the cornea of the recipient eye. The device of the present solution can be configured in a number of ways. In a first configuration, a scaffold can be coupled with the endothelial side of the DMEK graft. In a second configuration, the scaffold can be coupled with the stromal side of the DMEK graft. In a third configuration, one or more scaffolds can be coupled with both the endothelial and stromal side of the DMEK graft.

An anterior segment analysis apparatus includes a control device configured to: obtain a tomographic image of an anterior segment including a cornea of a subject eye formed by OCT measurement; detect a plurality of edges included in the tomographic image; perform a first joining including joining between edges for each of the plurality of edges based on a first joining condition; select a first edge and a second edge from among the joined edges based on a length; performs a second joining including joining between edges with reference to each of the first edge and the second edge based on a second joining condition; and determine a boundary of a layer of the cornea of the tomographic image using the edges joined by the second joining.