109 results about "Sclera" patented technology

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.

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.

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 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.

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.

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 invention relates to a method for controlling an ophthalmic surgical microscope (2) with an OCT device (3), the method having the following steps: • carrying out a first OCT scan (30), wherein the first OCT scan is carried out such that only a part of a phakic intraocular lens (26) implanted in the patient's eye (11) and only a part of an anterior capsular bag wall (19) of the patient's eye are captured in the first OCT scan (30), • determining a first absolute value (B1) of a first geometric parameter in the first OCT scan (30) by means of an image processing device (5), • carrying out a second OCT scan (33), wherein the second OCT scan is carried out such that only a part of a cornea (13) or sclera (21) and only a part of the iris (14) adjacent thereto are captured in the second OCT scan (33), • determining a second absolute value (B2) of a second geometric parameter in the second OCT scan (33) by means of the image processing device (5), • forming a first result (E1) by performing a mathematical operation on the first absolute value (B1) and a predetermined first base value (BA1) and forming a second result (E2) by performing a mathematical operation on the second absolute value (B2) and a predetermined second base value (BA2), wherein the first result (E1) and the second result (E2) are calculated by means of a calculation device (6), • outputting an output on the basis of the first result (E1) and the second result (E2) by means of an output device (7).

An apparatus for delivering therapeutic agent to an eye comprises a body, a cannula, a hollow needle, and an actuation assembly. The cannula extends distally from the body and is sized and configured to be insertable between a choroid and a sclera of a patient's eye. The actuation assembly is operable to actuate the needle relative to the cannula to thereby drive a distal portion of the needle along an exit axis that is obliquely oriented relative to the longitudinal axis of the cannula. The cannula may be inserted through a sclerotomy incision to position a distal end of the cannula at a posterior region of the eye, between the choroid and sclera. The needle may be advanced through the choroid to deliver the therapeutic agent adjacent to the potential space between the neurosensory retina and the retinal pigment epithelium layer, adjacent to the area of geographic atrophy.

An apparatus (200) includes a pair of rigid legs (210) extending parallel to each other along a plane. Each leg of the pair of legs has a sharp tip (215). The apparatus also includes a head (210) including a top surface (222), a bottom surface (224), a pair of end surfaces (226), a pair of side surfaces (227), and a guide notch (230) extending upwardly from the bottom surface. The guide recess is configured to mate with a surface of a sclera of a patient's eye to define a guide opening oriented transversely with respect to the plane associated with the leg and sized to receive a cannula having a generally flat profile. The head further includes a pair of receptacles (240) extending laterally inward from respective ones of the pair of side surfaces. Each receptacle of the pair of receptacles is configured to engage a placement instrument.

Embodiments of the present invention disclose a method, system, electronic device, and storage medium for determining ocular tissue information. The method comprises: injecting prepared magnetic nanoparticles into the eye region and adjusting the eye region to the light beam exit position of a data acquisition system; the eye region includes the cornea, sclera, lens, ciliary muscle, and / or retina; applying a controllable voltage to an electromagnetic coil in an excitation system so that the electromagnetic coil generates a controllable magnetic field based on the controllable voltage to drive the magnetic nanoparticles in the eye region; and transmitting a laser beam based on a laser in the data acquisition system so that the laser beam enters the eye region from the light beam exit position, and receiving a reflected light beam fed back from the eye region to obtain target ocular tissue data; and analyzing and processing the target ocular tissue data to obtain mechanical characteristic parameters corresponding to the eye region. The present invention can improve the comfort of the subject being measured during the measurement process.

The invention discloses a carotid plaque auxiliary detection method and system based on sclera segmentation. The method comprises the following steps: firstly, collecting white eye image data to construct a data set, carrying out semantic segmentation labeling on an image in the data set, determining a deep learning model architecture for image segmentation, and carrying out model training based on a white eye image and a mask image corresponding to the white eye image so as to generate weight information for prediction; carrying out background, sclera and iris region segmentation on the image by utilizing the trained model, and carrying out post-processing on a segmentation result; and finally, carotid plaque auxiliary detection is carried out by utilizing sclera region features. The sclera image analysis is applied to auxiliary detection of carotid plaques, the health condition of the carotid artery can be indirectly evaluated through the white eye image, and the problems that a traditional image method is high in equipment dependence and high in detection cost are effectively solved.

This image processing device executes processing that includes: acquiring a tomographic image in the depth direction including choroidal blood vessels and sclera; executing emphasis processing that emphasizes a physical quantity indicating a brightness change in the depth direction in the tomographic image with respect to a partial region of the tomographic image; deriving an image feature amount pertaining to the brightness change in the depth direction in the emphasized region; and determining, on the basis of the image feature amount, a site on the tomographic image in which the image feature amount exceeds a predetermined threshold as a boundary between the choroidal blood vessels and the sclera.

The utility model discloses an ophthalmology health education tool which comprises a cornea puzzle block, an iris puzzle block, a crystalline lens puzzle block, a vitreous body puzzle block and a sclera puzzle block which are used for simulating the shapes of a cornea, an iris, a crystalline lens, a vitreous body and a sclera respectively. The cornea jigsaw blocks, the iris jigsaw blocks, the crystalline lens jigsaw blocks, the vitreous body jigsaw blocks and the sclera jigsaw blocks can be spliced to form an eyeball model; the sclera puzzle blocks comprise a first sclera puzzle block, a second sclera puzzle block and a third sclera puzzle block; the glass jigsaw blocks comprise a first glass jigsaw block, a second glass jigsaw block and a third glass jigsaw block; the crystalline lens puzzle blocks comprise the first crystalline lens puzzle block, the second crystalline lens puzzle block and the third crystalline lens puzzle block. The ophthalmology health education tool can simulate the shapes of cornea, irises, crystalline lenses, vitreous bodies and sclera, can be assembled to form three eyeball models simulating myopia, hyperopia and normality, and has education significance and interestingness.

Methods of treating an eye are provided that entail partially penetrating the sclera and delivering light energy from an optical fiber within the penetration to treat the a target tissue in the eye, for example, to coagulate vasculature underlying the sclera within a planned incision area. Also provided are treatment probes for treating an eye of a patient includes an elongate body that defines a handle and an advanceable penetrating member and optical fiber housed within the elongate body. The probe is configured to advance the penetrating member so as to penetrate the sclera, only partially, and advance the treatment fiber into the penetration to deliver treatment light energy to coagulate the vasculature underlying the sclera. The probe can include one or more penetrating members and corresponding optical fibers to form one or more penetrations concurrently within the planned incision area.

A shunt operable to be implanted on an eye is provided. The shunt includes a vein fluidic channel operable to be in fluid communication with an interior of the eye and operable to receive aqueous fluid from the interior of the eye. A body is fluidly coupled with the vein fluidic channel. A valve is disposed within the body and is operable to regulate intraocular pressure in the eye by opening and closing based on pressure from the aqueous fluid. A plurality of outlets are in fluid communication with the body opposite the vein fluidic channel in relation to the valve. The outlets are operable to release the aqueous fluid to the sclera of the eye.

The utility model provides a magnetofluid simulation eye. The magnetofluid simulation eye comprises a simulation eyeball, a substrate and a magnetic field generating device, the simulated eyeball comprises a transparent container and magnetic fluid in the transparent container. The front face of the transparent container faces a viewer, and the substrate is arranged behind the transparent container. The substrate is provided with color points. And the magnetic field generating device is positioned behind the substrate. When the magnetic field generating device is powered on and generates a magnetic field, the magnetic fluid in the container forms a simulated iris of the simulated eye when viewed from the front of the transparent container, and the substrate on the outer side of the magnetic fluid forms a simulated sclera of the simulated eye. According to the utility model, the magnetofluid is used as a simulated object visualization medium, so that the creative concrete expression of simulated object eyes can be realized, and more pleasure and emotional resonance are brought to the life of people.

An ophthalmic instrument (10) for crosslinking of the sclera (5) of an eye (1) is presented. The ophthalmic instrument (10) comprises a periocular arm (11) which extends from a proximal end (12) to a distal end (13) and which comprises a bend (14) to reach along at least part of an outer contour of the eye (1) with an inside face (15) of the periocular arm (11). An opening (16) is arranged through the inside face (15) at or near the distal end (13) of the periocular arm (11). A light delivery device (17) is arranged in the opening (16) of the periocular arm (11) to deliver light for local crosslinking of the sclera (5) of an eye (1) positioned adjacent to the inside face (15) of the periocular arm (11).

A computer-based information processing system, and a computer-implemented method, and a non-transitory computer-readable storage medium, for automatically tracking eye rotation visible in captured images. The method, with a processing system, memory, a camera system, and a neural network, captures images of a patient's eye in various gazes, including a straight ahead gaze and at least one "as far as possible" gaze. The neural network segments the captured images into areas corresponding to the iris and the sclera, and performs feature extraction to identify the shape and location of visible limbus boundaries in each of the captured images. The shape and location of visible limbus boundaries are mapped to elliptical segments. The direction and magnitude of how far the eye has rotated is estimated based on a comparison of the reference ellipse and the at least one observed elliptical segment.

The invention provides a scleroscope device for noninvasive monitoring of an aqueous humor outflow coefficient, a monitoring method and a system, relates to the technical field of medical monitoring equipment for the ophthalmology department, and solves the problems that an aqueous humor outflow coefficient measuring method in the prior art is high in invasiveness, incapable of achieving continuous monitoring, insufficient in precision and poor in data synchronism. The sclera lens device comprises a sclera lens, the sclera lens comprises a central area, an edge landing area and a transition area connecting the central area and the edge landing area, and the edge landing area is used for making contact with the sclera of a user and providing support for the transition area and the central area; the phased array transducer matrix comprises a plurality of transducers which are annularly distributed in the transition area; the dynamic deflection control module is arranged in the transition area and is electrically connected with each transducer so as to control the excitation time delay of each transducer; the intraocular pressure monitoring module is arranged in the central area; and the signal processing module is arranged in the transition area.

A shunt operable to be implanted on an eye is provided. The shunt includes a vein fluidic channel operable to be in fluid communication with an interior of the eye and operable to receive aqueous fluid from the interior of the eye. A body is fluidly coupled with the vein fluidic channel. A valve is disposed within the body and is operable to regulate intraocular pressure in the eye by opening and closing based on pressure from the aqueous fluid. A plurality of outlets are in fluid communication with the body opposite the vein fluidic channel in relation to the valve. The outlets are operable to release the aqueous fluid to the sclera of the eye.

Device (2) for an ophthalmic illumination system (1) comprising a light instrument (3) for illuminating the intraocular space of a human or animal eye (33), wherein the device (2) comprises a housing (4) with a proximal housing end (5), a distal housing end (6), and an opening (7) in the proximal housing end (5), wherein the housing (4) defines a receiving space (8) which extends from the opening (7) in the proximal housing end (5) along a longitudinal direction (L) towards the distal housing end (6), and wherein the receiving space (8) for receiving the light instrument (3) is formed through the opening (7) in the proximal housing end (5), wherein the housing (4) comprises at least one translucent material at least in the region (10) of the distal housing end (6), wherein the device (2) is designed for indentation of the ocular tissue (34), in particular the sclera (9), wherein the distal housing end (6) with respect to a central longitudinal axis (A) of the housing (4) defines an opening angle (α) for emerging light of the light instrument (3) of approximately 110° according to EN-ISO 15752:2010, and wherein the distal housing end (6) is substantially dome-shaped or has the form of a sphere that is substantially flattened at least on one side, and / or wherein the housing (4) defines a canonical solid angle (β) in the region of the distal housing end (6) which is 2·π steradians, wherein this solid angle (β) forms a lateral surface of a right circular cone with a half, planar opening angle (α) of 90 degrees, such that within this solid angle (β) the radiance of the light (38) emerging from the region of the distal housing end (6) of the light instrument (3) is at least 60% of the radiance of the light (38) of the light instrument (3) within this solid angle (β).