200 results about "Sclera" patented technology

The devices and methods of the present invention provide a means to depress the sclera in such a fashion as to provide single point, multiple point, semicircular or 360° circumferential scleral tissue depression and light without the need for manual manipulation of the scleral depressor. The device comprises a shaped depressor for insertion between the sclera and the orbit of the eye and a holding means for positioning the depressor. In some embodiments the device can be integrated with a speculum. Use of the device eliminates the need to have a second person manipulate the depressor during the procedure and directly enables bimanual surgery.

A personalized prediction method for the curative effect of a corneal cross-linking operation comprises the steps that a high-resolution OCT image and a corneal topographic map of a patient are obtained, and a personalized three-dimensional eyeball model containing cornea and sclera parts is constructed; based on clinical data, establishing a biomechanical material model of the cornea, a keratoconus progress model and a cornea cross-linking mechanism model; constructing a finite element model of the eyeball through grid division and boundary condition determination; a corneal crosslinking operation is simulated by using a finite element method and an artificial intelligence technology, a real-time prediction system is constructed, and a postoperative curative effect prediction result is generated. According to the method, on the basis of real patient data, numerical simulation and artificial intelligence technologies are combined, personalized real-time prediction of the operation curative effect is achieved, preoperative patient science popularization education, doctor treatment decision selection and remote medical treatment are assisted, and the accuracy and the personalized level of operation planning are remarkably improved.

The utility model relates to the technical field of contact lenses, and particularly discloses a comfortable sclera lens which comprises an outer surface, the inner side of the outer surface is connected with an optical area, the periphery of the optical area is sequentially provided with a first transition area, a second transition area and a landing area, the first transition area and the second transition area are connected with each other, and the optical area is not in contact with the cornea. A plurality of liquid guide grooves are evenly formed in the inner side of the landing area at intervals, the inner ends of the liquid guide grooves penetrate through the first transition area and the second transition area and extend to the edge of the optical area, through holes are formed in the positions, close to the edge of the landing area, of the bottoms of the liquid guide grooves, and the through holes penetrate through the landing area. According to the sclera lens, the plurality of liquid guide grooves are formed, tear exchange between the sclera lens and the periphery of the eyes can be achieved after the sclera lens is worn, the situation that the eyes are dry after the sclera lens is worn for a long time is relieved, meanwhile, the through holes are formed in the inner sides of the liquid guide grooves, the tear exchange efficiency can be further improved through the through holes, the oxygen permeation rate can be improved, and the comfort degree is high when the sclera lens is worn.

The invention discloses an OK lens offset quantitative detection method and system based on a corneal topography map, and the method specifically comprises the following steps: carrying out the preprocessing of the corneal topography map, intercepting a lower half region, converting the lower half region into an HSV color space, and separating the brightness and chrominance information; extracting cornea sclera boundaries and OK lens red and green mark areas through dynamic threshold segmentation, and determining boundary key points and lens mutation point coordinates in combination with a sub-pixel level positioning technology; a standardization coefficient is dynamically calculated through the cornea diameter, and the pixel distance is converted into the actual physical offset. Through multi-modal feature fusion and dynamic parameter adjustment, the positioning error is reduced to + / -0.02 mm, the single time consumption is less than 5 seconds, and the method has the robustness of illumination interference resistance, motion blur resistance and individual cornea size difference, and provides an efficient and objective quantitative basis for evaluation of the wearing effect of the OK lens.

The invention provides a myopia risk prediction method and device based on artificial intelligence, equipment and a medium, and belongs to the technical field of artificial intelligence. The method comprises the following steps: acquiring fundus image data of a to-be-predicted individual; segmenting the fundus image data; extracting biomechanical characteristics of the sclera at the rear part of the eye of the individual to be predicted from the segmented fundus image data; and inputting the biomechanical characteristics into a pre-trained myopia risk prediction model for training to obtain a myopia risk prediction result of the to-be-predicted individual. By adopting the technical scheme of the invention, the biomechanical characteristics of the posterior eye sclera of the individual can be non-invasively evaluated, so that the myopia risk of the individual can be accurately predicted based on the biomechanical characteristics of the posterior eye sclera.

Systems and methods for eye image segmentation and image quality estimation are disclosed. In one aspect, after receiving an eye image, a device such as an augmented reality device can process the eye image using a convolutional neural network with a merged architecture to generate both a segmented eye image and a quality estimation of the eye image. The segmented eye image can include a background region, a sclera region, an iris region, or a pupil region. In another aspect, a convolutional neural network with a merged architecture can be trained for eye image segmentation and image quality estimation. In yet another aspect, the device can use the segmented eye image to determine eye contours such as a pupil contour and an iris contour. The device can use the eye contours to create a polar image of the iris region for computing an iris code or biometric authentication.

The present invention discloses an emotion recognition method based on eye movement analysis, belonging to the technical field of image processing. First, the eye images at consecutive moments are extracted and segmented to obtain the iris, sclera, and periorbital regions, and the region formed by the iris and sclera in contact with each other is marked as the eye region. Then, texture values are extracted from each sub-region of the periorbital region, texture centrifugal values are obtained, and a texture centrifugal vector is constructed. According to the width of the eye region at each moment, the width centrifugal value is obtained, and a width centrifugal vector is constructed. Based on the distance between the eye region and the iris region, the position centrifugal value is calculated, and a position centrifugal vector is constructed. Then, a feature change factor is obtained for each vector. Finally, the texture centrifugal vector, width centrifugal vector, position centrifugal vector, and the feature change factors corresponding to each vector are input into the emotion recognition neural network model to obtain the emotion type. The present invention solves the problem of low emotion recognition accuracy in the prior art.

The invention is related to a system and method for measuring intraocular pressure using the image sequences of human eyes, and analyzing the blood flow characteristics within iris and sclera and relating them with intraocular pressure (IOP) value.

The invention discloses an eye disease analysis method based on an eye image, and the method comprises the steps: carrying out the image segmentation of a sclera region through employing a convolutional neural network architecture u-net network model of image segmentation, carrying out the recognition of a hyperemia part of the sclera region, and calculating the proportion of the hyperemia part through employing FrangiFilter blood vessel recognition in combination with the color recognition of an LAB color space; by combining the image algorithm with a traditional image processing and deep learning model, the segmentation precision of the sclera region, the identification precision of sclera congestion, the robustness, the high accuracy and the rating accuracy are improved under the condition that the operation speed is not reduced.

The disclosure relates to a method for automatically adjusting brightness levels of a plurality of light sources mounted in a vehicle. The method includes detecting a first eye attribute value and a second eye attribute value of the user of the vehicle. The first eye attribute is a color of the user's iris, and the second eye attribute is a color of the user's sclera. The method includes determining that the user is photosensitive based on at least the second eye attribute value and evaluating a first brightness level for the plurality of light sources based on the first eye attribute value and the second eye attribute value. The method further includes setting a current brightness level of the plurality of light sources to the first brightness level.

The utility model discloses a lens for controlling diopter and relieving cervical vertebra strain based on the eye muscle balance theory, the surface of the lens is composed of a far vision area, a middle vision area and a near vision area which are variable in proportion, and a lens base is a prism with a variable base angle. According to the scheme, by means of the well-designed partitioning function and the position angle of the partitioning lens, far, middle and short-distance images can fall on the retina macular fovea center, fatigue, tension and spasm of eye muscles are effectively avoided, eye muscle coordination is improved, excessive adjustment, convergence and excessive sclera pulling through long-time short-distance eye using are avoided, and therefore the effect of improving the eye quality is achieved. The head of a student can be raised to a higher position when the student looks far, the eyeballs are turned upwards and outwards, hurt to the cervical vertebra of the student when the student lowers the head for a long time is further improved, neck soreness and stiffness and tension of muscles of the cervical vertebra and the shoulder are avoided, and the probability of humpback is reduced.

To provide an ocular device for placement under an eyelid.SOLUTION: The ocular device includes a plate with a back surface having at least one protrusion, where the at least one protrusion has a convex contact surface to contact the sclera of the eye and to provide an offset space. The plate can be connected to an elongated support member. The ocular device can deliver, to an eye of a user, a material including, e.g., a pharmaceutically active agent. A case for holding and dispensing an ocular device includes a well configured to retain fluid, a stabilizer, and a lid. The lid is connected to the well and rotatable between a position covering the well and a position with the well uncovered. The lid can have a port for adding fluid to the well, and a receiver, which can hold an ocular device, can project from the lid.SELECTED DRAWING: Figure 7H

The utility model discloses a cornea negative pressure suction trephine device for an eye library, which is a device for obtaining a cornea graft from an eyeball of a donor, and comprises an adsorption ring which is positioned on the eyeball above the cornea and a trephine which is sleeved on the periphery of the adsorption ring and can rotate relative to the adsorption ring, an annular adsorption face capable of being adsorbed to the eyeball in a negative pressure suction mode is formed on the end face of the adsorption ring, the trephine comprises a circular ring component and a circular cutting part formed at the far end of the circular ring component and used for annularly cutting the sclera, and the circular ring component is arranged on the periphery of the end, close to the annular adsorption face, of the adsorption ring in a sleeving mode. Thus, the cornea acquisition negative pressure suction trephine device for the eye library can be provided, the cornea acquisition negative pressure suction trephine device for the eye library is suitable for acquiring a cornea graft with uniform sclera tissue from a donor in a rotary cutting mode, and extrusion damage to cornea endothelial cells can be effectively reduced.

A docking device for intraocular surgery is provided having an upper edge portion having a second diameter, a lower edge portion having a first diameter and a bottom surface with at least one aperture, and a sidewall extending between the upper edge portion and the lower edge portion. An arm is also provided having a first portion coupled to the central portions of the upper and lower edge portions and a second portion configured for connection to a positioning arm. The lower edge portion also has a lower surface having a suitable profile configured to be secured to the sclera and / or conjunctiva of the surgical eye. Optionally, the lower surface of the upper edge portion is adapted and configured to releasably engage with the upper surface of the lower edge portion. Other variations include a split coupling that allows the suction surface to remain coupled to the surgical eye while removing other portions of the docking device.

The application discloses an ophthalmic choroid burst hemorrhage principle teaching mold, a plurality of water injection holes are arranged on the upper portion of the mold on the choroid, a plurality of water injection pipes are arranged correspondingly to the water injection holes, the water outlets of the water injection pipes are communicated to the choroid and the retina through the water injection holes, the water inlets are gathered in the sclera external port for connecting with a syringe, so that the syringe is used to inject or suck out liquid, and choroid burst hemorrhage is simulated. The application also provides a use method of the mold. The ophthalmic choroid burst hemorrhage principle teaching mold and the use method thereof can simulate choroid burst hemorrhage caused by eye injury, intraocular surgery and the like, have strong simulation, can realize on-site operation, have strong intuitiveness, good visual communication effect, are easy to understand, are convenient to carry, are easy to use, and greatly improve the teaching effect.

The utility model discloses a near fatigue relieving sclera lens which comprises a sclera lens body, the periphery of the sclera lens body is attached to the outer side of a sclera, and a tear storage space is formed between the sclera lens body and a cornea. According to the sclera lens, the tear storage space is formed between the sclera lens body and the cornea, the tear can be stored in the tear storage space to form a tear layer, the cornea is continuously wetted, the continuous water bath effect is achieved, the problems of dry eyes, astringent eyes and fatigue of a user are solved, and therefore pain caused by dry eyes is relieved.

The present invention discloses a contactless automatic analysis method for the degree of eye redness, comprising the following steps: photographing a human eye from the front of the face, performing eye region detection and image preprocessing on the photographed image, performing scaling and preprocessing, and then using a U-Net++ model to detect the sclera region to obtain a binary image, performing an AND operation on the binary image and the scaled image to obtain a sclera region color map; performing image smoothing and adaptive histogram equalization to enhance image contrast, filtering the image enhancement image using a B-COSFIRE filter, and converting the image enhancement image into a LAB color model to obtain an image mask; finally, performing an AND operation on the filtered image and the image mask to obtain a bloodshot binary map; and calculating the number of non-zero pixels in the sclera region color map and the bloodshot binary map, respectively, and then performing a ratio calculation to obtain the eye redness ratio. The present invention provides a contactless automatic analysis method for the degree of eye redness, which has high adaptability and accuracy in automatic determination and can achieve intelligent auxiliary diagnosis of the degree of eye redness in patients.

An ophthalmic needle guide for entry into a space below a sclera of an eye includes a housing. The housing has a contact surface and a needle guide surface. The contact surface defines a cavity within the housing. The contact surface extends at least partially along a contact plane. The needle guide surface extends about a needle axis to define a needle guide channel. The needle guide channel extends through the housing to an opening defined by the contact surface such that the needle guide channel leads to the cavity via the opening. The needle axis is substantially parallel to the contact plane. The contact surface is shaped such that when the eye needle guide is positioned on the eye, a portion of the sclera is positioned within the cavity and a surface of the eye contacts the contact surface and assumes the shape of the contact surface.

The invention relates to the field of medical treatment, in particular to a device for retina laser surgery practice. The eyeball model comprises a sclera, a cornea, an iris, a crystalline lens, a vitreous body and a retina; the mutual shapes and position relations of the sclera, the cornea, the iris, the crystalline lens, the vitreous body and the retina are the same as those of a real eyeball; wherein the retina is made of a photosensitive material; in the retina laser operation practice process, laser marks can be left on the photosensitive material through the fundus laser machine, and then a doctor is assisted to conduct practical operation practice.

This invention belongs to the field of contact lens technology, specifically providing a method for designing scleral lenses based on ocular surface and scleral topography. Based on the topography of the anterior surface of the patient's cornea and sclera, the method divides the anterior surface of the cornea and sclera into meridians at equal angles, and designs the surface profile curves of the anterior and posterior surfaces of the scleral lens according to the morphology of the patient's cornea and sclera. Finally, 3D reconstruction is used to obtain the 3D surface profile data of the scleral lens. The optical zone of the scleral lens can be designed in various ways depending on the different shapes of the patient's eyeball; the transition zone can be designed in diverse ways to ensure the thickness of the intraocular fluid at certain locations based on the ocular surface morphology; and the landing zone smoothly conforms to the anterior surface of the sclera. This invention maximizes conformity to the patient's ocular surface morphology, ensures the uniformity of the intraocular fluid, and maintains a high degree of matching with the ocular surface, thereby achieving trial-free scleral lens fitting, improving clinical accuracy and efficiency, and enhancing patient safety and satisfaction.

The embodiment of the invention provides an eyeball operation positioning method and system based on an RCM mechanism and electronic equipment, and belongs to the technical field of ophthalmologic operation instrument control. The method comprises the steps that trocar identification information on an eyeball is collected in real time through an image collecting device, and at least one trocar is fixed to the sclera of the eyeball; determining an initial position coordinate of an RCM point on the eyeball and initial attitude information of the RCM point according to the at least one piece of trocar identification information; adjusting the position of an RCM mechanism according to the initial position coordinate of the RCM point, and adjusting the posture of the RCM mechanism according to the initial posture information of the RCM point, so that the axis direction of an injection needle connected to the tail end of the RCM mechanism covers the center point of the target operation area. The method not only can realize high-precision operation positioning, but also can adapt to the dynamic change of eyeballs in the operation process, ensures that an operation instrument is always aligned with a target area, and greatly improves the safety and success rate of the operation.

The utility model provides a sclera outer pressing device for ophthalmologic operation, which comprises a handle, a pressing part is arranged at the end part of the handle, the pressing part is provided with at least two elastic pressing strips, one ends of the elastic pressing strips are separated from each other at intervals, the other ends of the elastic pressing strips are integrated, and a sliding sleeve is sleeved on the periphery of the handle. The sliding sleeve axially slides along the handle to drive the elastic pressing strip to be opened and closed. During use, the jacking part can form multi-point jacking, contact points of the jacking device and eyeballs are increased, the problem that the jacking part is prone to sliding in the surgical operation process is solved, and surgical operation efficiency and safety are improved.

An ophthalmological topographer is disclosed. The ophthalmological topographer includes a corneal topographer and a scleral measurement device including one or more scleral projection systems. Methods of determining topography are also disclosed.

The invention discloses an emotion recognition method based on eye expression analysis, and belongs to the technical field of image processing. The method comprises the following steps: firstly, extracting eye images at a plurality of consecutive moments and segmenting to obtain iris, sclera and periorbital areas, and marking an area formed by the iris and the sclera which are in position contact as an eye area; secondly, extracting texture values from each sub-region of the periocular region, obtaining texture centrifugal values and constructing texture centrifugal vectors; obtaining a width centrifugal value according to the width of the eye region at each moment, and constructing a width centrifugal vector; calculating a position centrifugal value according to the distance between the eye region and the iris region, and constructing a position centrifugal vector; obtaining a feature change factor for each vector; and finally, inputting the texture centrifugal vector, the width centrifugal vector, the position centrifugal vector and the feature change factors corresponding to the vectors into an emotion recognition neural network model so as to obtain an emotion type. The problem of low emotion recognition precision in the prior art is solved.

The invention relates to the technical field of medical instruments for the ophthalmology department, and particularly discloses a preparation method of a biological membrane strip for sclera reinforcement after the ophthalmology department, the preparation method comprises multilayer stacking and edge folding fixing, and specifically comprises the steps that pretreated extracellular matrixes are stacked in multiple layers and placed in a mold, and then four corners are folded inwards to form a fusiform shape; then applying pressure to fix by using upper and lower plane clamping plates, wherein the pressure is 10-200kpa; drying with a mold to obtain a biofilm strip; the middle section of the biological membrane strip is widest and gradually narrows towards two ends in an arc-shaped transition manner; the total length of the biological membrane strip is 20-70mm, and the thickness of the biological membrane strip is 0.1-0.4 mm; the width of the middle section is 10-40 mm, and the length of the middle section is 10-60 mm; and the width of the two ends is 5-20mm. The edge mechanical strength of the prepared biofilm strip is superior to that of the middle section, and the biofilm strip can better meet the requirements of posterior sclera reinforcement surgery for material reliability and long-term stability.

The invention discloses a zebra fish optic nerve ligation model construction system and device, the system comprises an acquisition module, an anesthesia module, a placement platform and a ligation module, the acquisition module is used for acquiring target basic information; the anesthesia module is used for determining target anesthesia parameters according to the target basic information; performing anesthesia according to the target anesthesia parameters; the placing platform is used for placing target zebra fish; the ligation module is used for clamping sclera by using a sterile tissue clamping tool with a fine tip so as to expose optic nerves; the eyeball is lifted through a sterile tissue clamping tool, and supporting pieces are arranged on the two sides of the eyeball to expand the operation space; separating the optic nerve from the blood vessel of the eyeball through a separation tool; ligating the optic nerve through a ligature; and removing the supporting piece, and resetting the eyeball to obtain the zebra fish optic nerve ligation model. By adopting the embodiment of the invention, the zebrafish optic nerve injury and regeneration model for simulating the chronic inflammation environment can be constructed.

An ocular compression device with light directed through the sclera. The compression device may detachably house a lighting device that can be used to illuminate the eye area during ophthalmic surgery. Integrating the lighting device with the compression device during the procedure may reduce the number of hands required to perform the surgery. This may be particularly beneficial for ophthalmic surgery where the available surgical space is limited.

The invention discloses a sclera jacking puncture locator. The sclera jacking puncture positioner comprises a handle and a tube body, the tube body comprises a first section and a second section, the first section is bent by 25-35 degrees relative to the second section, the end, away from the first section, of the second section is connected to the handle, and the end, away from the second section, of the first section is provided with a jacking head; the puncture needle is movably arranged in the tube body and can stretch out of or retract into the jacking head. The jacking head can jack the sclera, the puncture needle can stretch out of the jacking head to puncture the sclera, after puncture is completed, the puncture needle retracts into the jacking head, and the tube body is provided with the first section and the second section which are oppositely bent, so that the situation that the tube body shields the visual field of a microscope can be reduced, and non-blind area operation is achieved conveniently; according to the sclera jacking and puncturing positioner, jacking and positioning can be achieved, sclera puncturing operation can be conducted, non-blind area operation can be achieved during puncturing, and therefore the puncturing precision can be effectively improved, retina damage is avoided, and the risk of complications such as bleeding is reduced.

The utility model provides a sclera pressing device for ophthalmology department, which relates to the technical field of medical instruments for ophthalmology department, and comprises a fixed block tightly attached to the eye position, an extension block fixedly arranged at one end of the fixed block along the length direction, and a pressing piece fixedly arranged at one end of the extension block far away from the fixed block, the adjusting structure is fixedly arranged at one ends of the fixed block and the extension block. The problems that a surgeon cannot independently complete the operation of the whole operation, the operation of the surgeon is easily affected, and meanwhile a patient is easily injured are solved, the jacking piece can be better fixed to the eye position of the patient through the arranged fixing block, the jacking piece is adjusted downwards through the adjusting structure, and the patient can be prevented from being injured. The sclera of the patient can be better extruded by the jacking and pressing piece, the extrusion size can be freely adjusted during extrusion, the safety of the patient is better protected, and meanwhile the operation space of a surgeon is increased.

The present invention discloses a scleral lens, comprising a lens body, wherein the lens body is continuously formed with an optical zone, a transition zone and a positioning zone from the center to the outside, and the connection between the cornea and the sclera is divided into a corneal part, a transition zone and a scleral part in sequence along the direction from the cornea to the sclera. The positioning zone is attached to the sclera for positioning the scleral lens, and the transition zone spans the upper part of the cornea and the sclera, so that the optical zone is arranged at the front end of the cornea and provides vision correction for the eye. The transition zone is arranged as any one of a one-segment arc structure, a two-segment arc structure or a three-segment arc structure according to different shapes of the corneal part, the transition part and the scleral part, and can be differentiated and designed according to different shapes of the corneal part, the transition part and the scleral part to improve wearing comfort.