583 results about "Cornea" patented technology

This invention discloses a 2D gaze point estimation method based on the pupil-corneal reflection vector method. It utilizes the star ray method for pupil center localization and adds a classification pupil detection mechanism for error correction. Corneal feature extraction is performed to obtain the center coordinates of the corneal reflected light spot. Step 4: Establish a gaze mapping model, and assign the detected pupil-corneal reflection vector V(V) to each frame of the image. x V y The gaze coordinates G(G) mapped onto the screen x G y This invention enables 2D gaze point estimation based on the pupil-corneal reflection vector method. Compared with existing technologies, this invention can improve the accuracy of 2D gaze point estimation.

The invention relates to the field of surgical robots, and particularly discloses an intraoperative risk assessment system for a cataract surgical robot, comprising: a patient biomechanical monitoring unit for collecting a contact force between an instrument and an eye tissue, and calculating an anterior chamber equivalent pressure value according to an axial force component of the contact force and a contact area between the instrument and a cornea; the patient optical imaging monitoring unit is used for collecting microstructure images of the cornea and the lens capsule and quantifying the energy release density of ultrasonic emulsification; the robot motion parameter monitoring unit is used for collecting joint motion resistance, instrument tail end three-dimensional coordinates, motion speed and attitude angle of the robot; the multi-mode joint reasoning unit is used for identifying a high-risk operation state when the contact force is higher than a first preset value and the energy release density is higher than a second preset value; by adopting the technical scheme of the invention, multi-dimensional real-time monitoring can be realized, and a dynamic risk prediction model can be established by fusing heterogeneous data through an intelligent algorithm.

The present application relates to the field of smart wearable devices. Provided are a light source position calibration method, a device and a storage medium. The method comprises: using an image collection apparatus to collect user eye images; extracting from the eye images corresponding light spot two-dimensional coordinates and light spot three-dimensional coordinates of light spots formed by a light source, and, on the basis of the light spot two-dimensional coordinates, determining corresponding light source two-dimensional coordinates of the light source; and, on the basis of the light source two-dimensional coordinates, the light spot three-dimensional coordinates and preset coordinate parameters, determining corresponding light source three-dimensional coordinates of the light source, so as to calibrate the light source position of the light source in a smart wearable device on the basis of the light source three-dimensional coordinates. The present application calculates a position of a light source device on the basis of light spots formed by the light source in cornea areas of eye images, thus reducing the complexity of light source position calibration.

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 the technical field of multi-point defocusing, in particular to an optical stable photochromic multi-point defocusing myopia control lens prescription generation method, which comprises the following steps of: based on eyes of a wearer, scanning cornea by using a non-contact optical device, extracting iris and pupil characteristics, monitoring an adjustment reaction, and performing three-dimensional reconstruction and multi-direction light path tracking analysis to obtain a myopia control lens prescription. And the distribution configuration of the annular belt is optimized, and the overlapping area is adjusted by combining the photochromic requirement, so that the fusion function partition structure is formed. Through collection of multi-source visual parameters and combination of spatial modeling and focusing path analysis, cut-through association of individual visual behaviors and structural attributes in lens customization is realized, functional requirements of different areas and photochromic response are dynamically fused through hierarchical adjustment of the spatial structure of an intervention area, and the visual performance of the lens is improved. And the material and microstructure data are synchronously output to a manufacturing link, so that the collaborative matching capability of the visual area partition is enhanced, and the requirements of a wearer on visual comfort and optical reaction are met.

The invention belongs to the field of visual training, and particularly relates to a multispectral dynamic visual function training system and method. The multispectral dynamic visual function training system comprises an image acquisition module, an intelligent analysis module, a control module, a training execution module and a multispectral light source module, the image acquisition module is arranged at a position corresponding to an eye and is used for acquiring image information near eyeballs of a user, personal information of the user and a vision diagnosis result in real time, and the image information comprises eyeball movement tracks, pupil sizes and forms, cornea edge contours and eye white elastic states; and the intelligent analysis module combines the image information and the acquisition time of the image information. According to the scheme, through collection, analysis, regulation and control of a closed loop, the problems that in the prior art, a real-time analysis mechanism based on eyeball images is lacked, the adaptability of a training scheme and eye dynamic characteristics is weak, and precise regulation and control of functions such as light nutrition supplement and choroid stimulation cannot be achieved are solved; and precise training is also realized, and the effects of prevention and protection, cooperative improvement, compliance improvement and the like are achieved.

The invention provides an eye movement tracking method, a control unit and eye movement tracking equipment, and relates to the technical field of eye movement tracking. The method comprises the steps of obtaining a surface image of a target eyeball; extracting composite phase distribution from the surface image, wherein the composite phase distribution represents phase coupling information after the incident light is jointly modulated by a cornea interface and a crystalline lens interface of the target eyeball; based on eyeball geometric constraint and cornea interface smoothness prior, according to the composite phase distribution, constructing a decoupling objective function with separation of cornea phase distribution and crystalline lens phase distribution as a target; taking a minimum decoupling objective function as an optimization objective, and iteratively determining cornea phase distribution decoupled from crystalline lens phase distribution; and determining the visual axis direction of the target eyeball according to the cornea phase distribution. Through the double-interface phase decoupling technology, the visual axis error in a large view field and eyeball depth motion scene is effectively reduced, and the eye movement tracking precision is remarkably improved.

Transcorneal and fiberoptic laser delivery systems and methods for the treatment of eye diseases wherein energy is delivered by wavelengths transparent to the cornea to effect target tissues in the eye for the control of intraocular pressure in diseases such as glaucoma by delivery systems both external to and within ocular tissues. External delivery may be affected under gonioscopic control. Internal delivery may be controlled endoscopically or fiberoptically, both systems utilizing femtosecond laser energy to excise ocular tissue. The femtosecond light energy is delivered to the target tissues to be treated to effect precisely controlled photodisruption to enable portals for the outflow of aqueous fluid in the case of glaucoma in a manner which minimizes target tissue healing responses, inflammation and scarring.

The invention discloses a novel corneal contact lens for controlling myopia development and a processing method, the novel corneal contact lens comprises a lens body, and the lens body is divided into a central optical area and an annular light adding area; the central optical area is located in the middle area of the mirror body and is concentric with the mirror body, and the central optical area has accurate diopter and is used for correcting far vision of a wearer and ensuring that the wearer obtains clear central vision; the annular light adding area is located on the outer ring of the central optical area, the annular light adding area is provided with positive spherical lens additional degrees compared with the central optical area, and the positive spherical lens additional degrees are achieved by adding fuzzy patterns to the annular light adding area. And the annular light adding area is used for reducing the definition and contrast of an image formed around the retina by the light passing through the area. According to the corneal contact lens, myopic defocus is generated on the periphery of the retina at the same time, and the imaging contrast ratio and definition are reduced, so that the excessive growth of the ocular axis can be more effectively inhibited.

The invention relates to the technical field of medical instruments, in particular to a cornea protection eyeshade for a patient with hyperthyroidism eye disease, which comprises an eyeshade main body, the eyeshade main body comprises a support frame, a protection cover and a fitting layer are mounted on two sides of the support frame, and a self-adaptive fitting adjusting assembly, a multifunctional linkage module and a magnetic suction buffer assembly are further mounted on the support frame. The self-adaptive fitting adjusting assembly is used for driving the fitting layer to adapt to eye contours of different patients, the multifunctional linkage module is used for achieving switching of eye moisturizing and one-way light transmission of the patients, the magnetic attraction buffering assembly is used for relieving compression during wearing and fixing, and the monitoring assembly is installed on the fitting layer and used for monitoring state information of the eye contours of the patients. The monitoring assembly is in signal connection with a controller, and the controller is used for manually adjusting the moisturizing amount and the light transmission mode of the multifunctional linkage module according to the state information. According to the method, full-scene and personalized cornea protection is provided for a patient with hyperthyroidism synophthalmia, and the cornea is prevented from being damaged by exposure, dryness, strong light or compression.

The invention relates to the technical field of multi-point defocusing, in particular to an optical stable photochromic multi-point defocusing myopia control lens prescription generation method, which comprises the following steps of: based on eyes of a wearer, scanning cornea by using a non-contact optical device, extracting iris and pupil characteristics, monitoring an adjustment reaction, and performing three-dimensional reconstruction and multi-direction light path tracking analysis to obtain a myopia control lens prescription. And the distribution configuration of the annular belt is optimized, and the overlapping area is adjusted by combining the photochromic requirement, so that the fusion function partition structure is formed. Through collection of multi-source visual parameters and combination of spatial modeling and focusing path analysis, cut-through association of individual visual behaviors and structural attributes in lens customization is realized, functional requirements of different areas and photochromic response are dynamically fused through hierarchical adjustment of the spatial structure of an intervention area, and the visual performance of the lens is improved. And the material and microstructure data are synchronously output to a manufacturing link, so that the collaborative matching capability of the visual area partition is enhanced, and the requirements of a wearer on visual comfort and optical reaction are met.

The utility model provides a human eye simulation camera, and belongs to the technical field of camera shooting. The human eye simulation camera comprises a corneal lens, a simulation iris and a photosensitive element which are sequentially arranged along a photosensitive path, a simulation pupil is arranged in the center of the simulation iris, and a filtering medium for infrared cut-off is arranged between the simulation pupil and the photosensitive element. Therefore, according to the human eye simulation camera provided by the invention, unnecessary infrared light reflection can be eliminated by arranging the filtering medium, so that the recognition precision of an eye movement algorithm is improved.

The embodiment of the invention relates to the technical field of image processing, and discloses a blink detection method and device, electronic equipment and a computer readable storage medium, and the method comprises the steps: obtaining a plurality of frames of eye images; identifying the multiple frames of eye images to obtain eye parameters respectively corresponding to the multiple frames of eye images, the eye parameters including one or more of an eye angle parameter, a first distance ratio and a second distance ratio, the eye angle parameter is determined according to an inner angle of a quadrangle formed by the upper eyelid feature point, the lower eyelid feature point, the inner canthus feature point and the outer canthus feature point, the first distance ratio is determined according to a first distance between the upper eyelid feature point and the lower eyelid feature point and the cornea width, and the second distance ratio is determined according to the first distance and the second distance between the upper eyelid feature point and the lower eyelid feature point. And a second distance between the inner canthus feature point and the outer canthus feature point; and determining blinking information according to the eye parameters respectively corresponding to the plurality of frames of eye images. By implementing the embodiment of the invention, the accuracy of the determined blink information can be improved.

The invention provides a sclera lens. The sclera lens comprises an optical area, a transition area and a sclera contact area which are sequentially connected from inside to outside in the radial direction of the sclera lens. The transition area is arranged around the optical area, and the sclera contact area is arranged around the transition area; the sclera contact area is used for being attached to the sclera of the eyeball; tear storage spaces can be formed between the optical area and the cornea of the eyeball and between the transition area and the cornea of the eyeball; a wireless communication unit and a plurality of sensors are embedded in the sclera contact area, each sensor is provided with a sensing surface, and the sensing surfaces extend from the sclera contact area to the tear storage space and are attached to the transition area; the wireless communication unit is connected with the plurality of sensors and receives and sends data signals of the sensors; the data signals comprise a first electric signal for identifying ROS concentration, a second electric signal for identifying impedance or osmotic pressure and a third electric signal for identifying PH value. According to the technical scheme, tear detection is achieved, the wireless communication technology and the sensor technology are fused, and a user can conveniently obtain various key parameters of the tear.

The invention relates to the technical field of medical instruments, in particular to a device for assisting upper and lower eyelids of a patient in closing, which comprises a glasses frame, glasses legs arranged on two sides of the glasses frame and a nose pad in the middle, and further comprises an eyelid fixing component mounted on the inner side of the glasses frame through a mounting frame, and a traction mechanism arranged in the mounting frame and used for fixing the eyelids. The traction mechanism is connected with the eyelid fixing assembly and is used for driving the eyelid fixing assembly to assist the closing and opening of the upper and lower eyelids of the patient, so that the problems that the existing device mostly adopts rigid fixation or continuous external force to assist the closing and opening of the upper and lower eyelids of the patient and cannot be dynamically adjusted along with the blinking action of the patient are solved; the closing and opening switching process of the eyelids of the patient is stiff, the cornea can be pressed due to too large instant tension during closing, the eyelids cannot be completely opened due to insufficient reset force during eye opening, the switching process is lack of natural buffering, and meanwhile, due to uncontrollable fixing force, the cornea cannot be completely opened. And falling-off is easily caused by sweat and expression activities.

The invention discloses a sight tracking method and system based on cascade deep learning and distance correction, and a storage medium. The method comprises the following steps: processing an eye image through a cascade deep learning model, and obtaining pupil center coordinates and cornea reflection light spot coordinates of two eyes; calculating a binocular pixel distance as a distance correction factor based on the pupil center coordinates, and calculating a relative position difference vector based on the pupil and light spot coordinates; establishing a three-dimensional nonlinear polynomial regression model taking the relative position difference vector and the distance correction factor as input; obtaining calibration data through a multi-distance sampling strategy and solving a model coefficient; and in the real-time tracking stage, calculating the coordinates of the fixation point of the screen by using the solved model. According to the method, the distance correction factor and the three-dimensional mapping model are introduced, so that geometric errors caused by forward and backward movement of the head of the user are effectively eliminated, meanwhile, the feature point positioning precision is ensured through cascaded deep learning detection, and the precision and robustness of a sight line tracking system are remarkably improved.

The invention provides a cornea image death time prediction method based on a multi-modal Transform-diffusion model, and belongs to the technical field of forensic science, and the method comprises the steps: firstly obtaining cornea image data and environmental parameter data; preprocessing the cornea image data; image quality enhancement is carried out by using a diffusion model, and the noise problem in a low-quality image is effectively solved; carrying out feature extraction on the enhanced cornea image through a VisionTransform, and capturing a complex nonlinear relationship; multi-modal fusion is carried out on cornea image features and environmental parameter data, and various influence factors are comprehensively considered; finally, a death time prediction result is generated based on the fusion features, the method further comprises the steps that the model is compressed and deployed to lightweight equipment, field application is achieved, and the method achieves high-accuracy prediction within the range of 0-72 hours and particularly has obvious advantages in long-time prediction over 24 hours.

Approaches are described for facilitating remote ophthalmic examinations using three-dimensional (3D) imaging and mixed reality technology. A system obtains real-time or stored 3D data of a patient's eye, capturing detailed anatomical structures. The system analyzes the 3D data to identify specific regions of the eye, such as the cornea or retina, and retrieves corresponding diagnostic data and patient-specific clinical information. The 3D data, diagnostic metrics, and clinical records are integrated to generate an interactive visualization, which is presented through a mixed reality interface. The system allows healthcare professionals to manipulate diagnostic overlays, investigate flagged abnormalities, and adjust the visualization using gesture-based inputs. Machine learning models may be applied to detect potential abnormalities in the eye, while the system also determines stages of the examination based on changes in the anatomical structure of the eye.

Methods to trigger eye enrollment without requiring good gaze interaction are described that allow a guest user of a device to initiate partial or full eye enrollment even though their eye model is not known and thus conventional gaze-based interactions do not work well. A gaze tracking system collects gaze data in the background. At any time (or within an interval after a user puts on the device), an eye enrollment can be triggered by detecting some gaze gesture, for example rolling the eyes in a large circle, or moving the eyes randomly for a time that exceeds a threshold. Depending on the coverage of the gaze / cornea data collected in the background, a full eye enrollment or only a visual axis enrollment may be performed in response to the gesture.

The application provides an illumination device for fundus observation, comprising a contact lens, a light guide plate and an illumination light source; the contact lens is provided with an arc-shaped side and a light-in side, the arc-shaped side is used for adhering to the cornea; the light-in side is provided with the light guide plate; the light guide plate is provided with a light inlet and a light outlet; the incident light of the illumination light source is incident into the light guide plate through the light inlet, the light guide plate reflects the incident light and the reflected light is incident into the contact lens through the light outlet; the incident light passes through the arc-shaped side of the contact lens and the cornea and is incident into the eyeball to illuminate the fundus. The illumination device for fundus observation of the application sets the illumination light source on the side of the contact lens and limits and adjusts the angle of the light incident into the eyeball through the light guide plate, so that the number of the light incident into the fundus is increased, and the contact fundus imaging device can form clear and accurate fundus imaging while reducing the traditional light spot interference.

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).

The invention discloses a corneal glucose real-time non-invasive detection system and method, and belongs to the technical field of glucose real-time non-invasive detection.The method comprises the following steps that corneal reflection spectrum, tear film thickness change and environment temperature and humidity data are obtained in real time, and spectrum compensation parameters are generated through a temperature and humidity compensation model; outputting a tear film refractive index correction value in combination with a refractive index correction model, and correcting the reflection spectrum through a combined correction formula; then, calculating a reference reflection spectrum and a deviation value based on historical data, extracting statistical characteristics, and fusing confidence to obtain a confidence factor for adjusting the deviation value; if the deviation exceeds the threshold value, replacing the corrected data with the reference data; and finally, calculating the glucose concentration according to the processed spectrum, and determining the health grade according to a preset comparison table. The high-reliability non-invasive blood glucose health monitoring closed-loop method and system are constructed through multi-source data fusion correction, intelligent deviation optimization and a confidence coefficient decision mechanism.

The utility model discloses a capsulorhexis marker for cataract surgery, relates to the technical field of surgical instruments, solves the problems that an existing device is low in operation stability and low in operation accuracy, and adopts the following scheme that an electric telescopic rod A is fixedly installed on the top face of a base. Through the arrangement of an electric telescopic rod A, an air cylinder and an electric telescopic rod B, the electric telescopic rod A and the air cylinder can drive an outer ring sleeve to move up and down, so that the outer ring sleeve is aligned with the edge of the cornea, then the electric telescopic rod B drives an inner ring to move downwards, a little pressure is applied to the cornea, and through mechanical operation, the stability and safety are improved; meanwhile, through the arrangement of a display screen, a super-definition camera and an illuminating lamp, when the outer ring sleeve and the inner ring are in contact with the cornea, the illuminating lamp illuminates the eyes, the super-definition camera transmits images of the eyes to the display screen to be displayed, observation of medical staff is facilitated, and the operation precision is improved.

The invention discloses an eye movement tracking system and method based on a position sensitive detector. The eye movement tracking system comprises an infrared lighting module, an optical element, the position sensitive detector and an MCU. The infrared lighting module emits infrared light which can be borne by human eyes to a cornea area of a user, the optical element performs angle compression and beam shrinkage on reflected light obtained after the infrared light is reflected in the cornea area of the user, and then the reflected light enters the position sensitive detector; four paths of voltage signals output by the position sensitive detector are input into the MCU; a reflected light spot position calculation module and a nonlinear mapping relation model between a reflected light spot position and an eyeball rotation angle are integrated in the MCU; the reflection light spot position calculation module is used for carrying out normalization processing on the four paths of voltage signals and calculating a ratio to obtain a reflection light spot position; the nonlinear mapping relation model between the reflected light spot position and the eyeball rotation angle takes the reflected light spot position as input and the eyeball rotation angle as output to realize eye movement tracking.

This application relates to a femtosecond laser multi-degree-of-freedom personalized reshaping method and system for intracorneal implants, belonging to the field of femtosecond laser processing technology. Utilizing the cold processing characteristics of femtosecond lasers, the intracorneal implant is individually cut and ablated to obtain the desired three-dimensional corneal shape, precisely shaping the curvature, thickness, and contour of the lens to perfectly match the patient's corneal capsule or lesion area. By leveraging the nonlinear optical effect induced at the focal point of the femtosecond laser, the stromal collagen network in the weak areas corresponding to corneal expansion can be densified through laser processing, significantly improving the local elastic modulus and resistance to deformation. In areas requiring a smooth transition with the recipient cornea or adjustment of refractive power, controllable micropores or low-density areas can be induced, appropriately reducing local stiffness, thereby achieving a spatial gradient distribution of internal mechanical properties and customizing the overall mechanical behavior and morphological stability after implantation.

The invention discloses corneal contact lens aging test equipment and a corneal contact lens aging test method, and belongs to the technical field of corneal contact lens experiments.The corneal contact lens aging test equipment comprises an experimental box body, and a placement table is arranged at the bottom in the experimental box body; an environment simulation unit for simulating the internal environment of the experiment box body and an adjusting unit for adjusting the position and angle of the environment simulation unit are arranged on the placement table. The environment simulation unit and the heating column are adopted to simulate the illumination intensity, the temperature, the humidity and the like in the experiment box body, the aging degree caused by single or multiple factors of the corneal contact lens can be experimented, the accuracy of the experiment result is improved, the bearing ball is arranged, artificial tears are conveyed through the pump body, and the experiment efficiency is improved. The bearing ball rotates under the action of the potential energy of the artificial tears, so that the corneal contact lens can be intermittently contacted with the artificial tears, and the aging experiment that the corneal contact lens is directly contacted with the environment under the wearing condition is simulated.

The present application provides a human eye simulation camera, comprising a corneal lens, a simulated iris, and a photosensitive element which are sequentially arranged along a photosensitive path, and a filter medium for infrared cut-off is provided on the photosensitive path between the surface of the corneal lens facing away from the simulated iris and the photosensitive element. In this way, the human eye simulation camera provided by the present application, by providing the filter medium, can eliminate unnecessary infrared light reflection, thereby improving the recognition accuracy of an eye movement algorithm.

To treat corneal ectatic disorders, systems and methods can precisely apply photoactivating light to specified areas of a cornea treated with a cross-linking agent. An example system includes a light source that provides a photoactivating light to photoactivate a cross-linking agent applied to an eye. The system includes optical element(s) that transmit the photoactivating light to the eye according to a pattern defined by a plurality of treatment zones. The treatment zones are delivered to different respective areas on the eye. The plurality of treatment zones includes at least a first treatment zone and a second treatment zone. The first treatment zone provides a first dose of the photoactivating light. The second treatment zone provides a second dose of the photoactivating light. The first dose is greater than the second dose. The first treatment zone is disposed within an inner boundary of the second treatment zone.

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 utility model relates to a rotary type ultrasonic emulsification instrument injection and suction handle which comprises an outer shell, a negative pressure pipe is fixed in the outer shell, one end of the negative pressure pipe extends out of the outer shell to be communicated with a negative pressure device, the negative pressure pipe is hinged to a suction pipe, the suction pipe is communicated with an inner cavity of the negative pressure pipe, and the suction pipe is driven by a driving device of the outer shell to rotate. The driving device is used for driving the suction pipe to rotate, the back side area of an incision can be adsorbed by sight lines in the process of sucking and breaking crystalline lenses, meanwhile, the infusion pipe arranged on the outer side of the suction pipe in a sleeving mode is not affected, and the suction pipe is arranged in the outer shell in a sleeving mode. And the expansion degree in the cornea is ensured.