Eye parameter evaluation device

Abstract

The ocular parameter evaluation device includes a measurement unit and a man-machine interaction unit, both of which are mounted on a base 22. The measurement unit includes at least one camera module, at least one canthus anchoring point, and a light source module. The camera module collects ocular data. The man-machine interaction unit adjusts the position of the canthus anchoring point 4, 10 so that the canthus anchoring point 4, 10 is aligned with the outer corner of the eye. The canthus anchoring point 4, 10 is connected to an inclined lens 5, 11. The light source module includes a plurality of discretely arranged light bars and a near-infrared light source, and the near-infrared light source selectively cooperates with the light bar to assist the operation of the camera module. When used as a proptosis examination device, the device is easy to operate. After the outer corner of the eye is aligned, measurement can be completed by simply taking a video or image, which greatly improves the measurement efficiency and accuracy of parameters such as exophthalmos.

Description

[Technical Field]

[0001] The present invention relates to the technical field of measuring instruments, and more particularly to an ophthalmic parameter evaluation device. [Background technology]

[0002] Measuring ocular characteristic parameters is of great significance in medical and scientific research. In practice, operators frequently need to obtain characteristic parameters such as the degree of exophthalmos and palpebral fissure width of subjects. Currently, common measuring devices include Hertel exophthalmometers and CT scanners. The former requires manual operation and reading by operators, and measurement results are less stable due to differences in operator habits and usage experience. The latter has high measurement accuracy, but CT scanners have many problems, such as high radiation doses, high measurement costs, and slow results. Other similar measuring devices exist in the related art, but these devices have many problems, such as complex operation and low measurement accuracy. In addition, the devices mentioned in the background art usually cannot measure multiple ocular parameters at low cost using the same device. That is, the devices in the related art usually can only measure a single parameter and lack high-precision data processing means, resulting in low measurement results and failing to meet users' measurement needs. Summary of the Invention [Problem to be solved by the invention]

[0003] In order to solve the problems in the related art that the equipment cost is high, the stability of the measurement results is low, and multiple parameters cannot be measured at low cost using the same equipment, the present invention provides an eye parameter evaluation device that solves at least one of the problems in the related art. [Means for solving the problem]

[0004] In order to achieve the above object, an ocular parameter evaluation device according to one aspect of the present invention comprises: Each includes a measurement unit and a man-machine interaction unit mounted on a base, The measurement unit includes at least one photographing module, at least one eye corner anchoring point, and a light source module; The imaging module collects eye data; The man-machine interaction unit adjusts the position of the canthus anchoring point so that the canthus anchoring point is positioned at the outer corner of the eye, and the canthus anchoring point is connected to an inclined reflecting mirror so that the photographing module collects a virtual image of the side of the eye by the reflecting mirror; the light source module includes a plurality of discretely arranged light bars and a near-infrared light source, and the near-infrared light source selectively cooperates with the light bars to assist the operation of the photography module; After turning on the near-infrared light source, the lighting order of the light bars is controlled sequentially to illuminate the strip-shaped light sources at different positions on the surface of the eyeball, and the photography module is synchronously controlled to collect a virtual image video stream of the eye on the reflector. The man-machine interaction unit extracts an image frame in the virtual image video stream corresponding to the reflected light at which the longest visible light pillar appears on the eyeball, and obtains the exophthalmos power value by analyzing the data of the extracted image frame.

[0005] In a preferred embodiment, the evaluation device further includes a control unit that obtains the command received by the man-machine interaction unit and controls the movement of the canthus anchoring point to position the canthus anchoring point in contact with the outer corner of the eye.

[0006] In a preferred embodiment, the light bar and the near-infrared light source are both electrically connected to a control unit; The near-infrared light source selectively cooperates with the light bar means that the control unit controls the light bar to turn on in a predetermined sequence, or controls the near-infrared light source to turn on, or controls the light bar to turn on in a predetermined sequence and controls the near-infrared light source to turn on, based on differences in measurement modes.

[0007] In a preferred embodiment, the imaging module is electrically connected to the control unit; In response to the on state of the light bar or the near-infrared light source, the control unit controls the imaging module to collect an eye video stream at the reflector, or controls the imaging module to collect a first eye position image, a second eye position image, or a third eye position image of the eye, or controls the imaging module to collect a video stream of the eye rotation state, depending on the difference in the measurement mode.

[0008] In a preferred embodiment, the measurement mode is at least one of an exophthalmos measurement mode, an eye activity measurement mode, a palpebral fissure width measurement mode, or a conjunctival hyperemia measurement mode.

[0009] In a preferred embodiment, the wavelength of the near-infrared light source is 700 nm to 1200 nm.

[0010] In a preferred embodiment, the evaluation device further comprises a forehead rest and a chin support; the forehead rest is connected to a horizontally moving platform, and the control unit is electrically connected to the horizontally moving platform to adjust the front-to-back position of the forehead rest; The chin support is connected to a vertically moving platform, and the control unit is electrically connected to the vertically moving platform to adjust the vertical position of the chin support.

[0011] In a preferred embodiment, there are two of the eye canthus anchoring points and two of the reflecting mirrors, which are arranged on the left and right sides of the measurement unit, respectively, and the reflecting mirrors are arranged at an angle to the eye canthus anchoring points to form a virtual image corresponding to the eyeball.

[0012] In a preferred embodiment, the photographing module includes two area cameras arranged on the left and right sides, and / or there are two near-infrared lights arranged on both sides of the measuring unit.

[0013] In a preferred embodiment, the base is provided with a card slot and / or multiple types of communication interfaces. [Effects of the Invention]

[0014] The technical means of the present invention have the following advantages or beneficial effects.

[0015] (1) The measurement unit integrates at least one camera module, at least one canthus anchoring point, and a light source module. The camera module collects eye data, and the man-machine interaction unit adjusts the position of the canthus anchoring point to align it with the outer corner of the eye. The canthus anchoring point is connected to an inclined reflector, and the near-infrared light source selectively cooperates with a light bar to assist the operation of the camera module. This simplifies the operation of the device in one embodiment, allowing measurement to be completed simply by capturing a video or image after the outer corner of the eye is aligned. This, combined with image recognition, allows for the acquisition of eye parameters, significantly improving measurement efficiency and data measurement accuracy. This solves the problems of related art measurement devices, such as high measurement costs, low measurement efficiency, and the inability to simultaneously measure multiple data, and is free from side effects such as radiation. The evaluation device of the present invention provides a wide range of light field conditions and can satisfy the measurement of multiple parameters, allowing it to be applied to multiple measurement modes at low cost and acquire a wide range of measurement data.

[0016] The cooperation of the near-infrared light source and the light bar generates a clear image of the eye contour reflected light on the reflector, and the photography module collects a clear exophthalmos video stream, improving the quality of the data source for image processing and obtaining accurate exophthalmos measurement values. When used in an eye examination device, the device of the present invention has high measurement data accuracy, good stability of measurement results, and data measurement is not dependent on the user's experience.

[0017] (2) The use of near-infrared light fields can better distinguish between the sclera, iris, and pupil boundaries, thereby improving the accuracy and stability of the algorithm. Therefore, by using a near-infrared light source with a wavelength of 700 nm to 1200 nm, the accuracy of measuring exophthalmos, ocular activity, and palpebral fissure width can be significantly improved.

[0018] (3) The forehead rest is connected to a horizontally moving platform, and the control unit is electrically connected to the horizontally moving platform to adjust the front-to-back position of the forehead rest; the chin support is connected to a vertically moving platform, and the control unit is electrically connected to the vertically moving platform to adjust the up-down position of the chin support; and it cooperates with the eye corner locking point adjustment structure to first roughly adjust the positioning of the eye corner locking point, and then finely adjust its positioning; the above two-stage adjustment process can improve the positioning efficiency and positioning accuracy of the eye corner point.

[0019] (4) Improving the resolution and accuracy of the two-dimensional image captured using the area camera provides an accurate data source for subsequent data processing, thereby improving the parameter measurement accuracy of the device of the present invention. [Brief explanation of the drawings]

[0020] The drawings are intended to provide a better understanding of the invention and are not intended to unduly limit the invention.

[0021] [Figure 1] 1 is a perspective view of an ophthalmic parameter evaluation device according to an embodiment of the present invention. [Figure 2] 10 is a schematic diagram of another viewing angle of the ocular parameter evaluation device according to the embodiment of the present invention. FIG. [Figure 3] 1 is a schematic diagram of a partial structure of an ophthalmic parameter evaluation device according to an embodiment of the present invention. [Figure 4] 1 is a top view of a partial structure of an ophthalmic parameter evaluation device according to an embodiment of the present invention. [Figure 5]1 is a front view of a partial structure of an ophthalmic parameter evaluation device according to an embodiment of the present invention. [Figure 6] 1 is an image collected by an eye parameter evaluation device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0022] For ease of understanding, exemplary embodiments of the present invention will be described below with reference to the drawings, including various details of the embodiments of the present invention, which should be considered as merely examples. Therefore, those skilled in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present invention. Similarly, for clarity and conciseness, the following description will omit descriptions of known functions and structures.

[0023] In order to solve at least one problem in the background art, one aspect of an embodiment of the present invention provides an eye parameter evaluation device or an eye parameter measurement device.

[0024] The evaluation device shown in FIG. 1 includes a measurement unit and a man-machine interaction unit, both mounted on a base. To facilitate use by the operator and the subject, the measurement unit and man-machine interaction unit are located on both the front and rear sides of the base. When the operator performs a measurement operation facing the man-machine interaction unit, the operator can easily observe the subject's head posture and control the operating state of the device. Therefore, the subject's face faces the housing 21 of the measurement unit. For example, the man-machine interaction unit may be a combination of a display and a keyboard, or a touch screen 17. Furthermore, the measurement unit includes at least one camera module, at least one eye canthus anchoring point, and a light source module. The camera module collects eye feature data. The data here refers to images or video streams that can be continuously displayed on an eye screen. The man-machine interaction unit is controllably connected to the eye canthus anchoring point and adjusts the position of the eye canthus anchoring point so that the eye canthus anchoring point is aligned with the outer corner of the eye. As explained in the background art, the accuracy of measurement results from devices in the related art is heavily dependent on the user's experience. Differences in operating habits among individuals can lead to differences in the positioning of the outer corner of the eye, making it difficult for operators to accurately and synchronously position both the left and right outer corners of the eye. To solve this problem, the canthus anchoring point of the present invention is attached to a displacement platform, which adjusts the displacement of the canthus anchoring point after receiving a command from a man-machine interaction unit to accurately position the canthus anchoring point at the outer corner of the eye. To address the problem of simultaneously positioning both the left and right outer corners of the eye, it is sufficient to provide one canthus anchoring point on each side of the evaluation device. As can be seen, the operator needs to observe the position of the canthus anchoring point in real time during the process of adjusting the position of the canthus anchoring point. This observation can be performed in a variety of ways. For example, distance information between the eye and the canthus anchoring point can be obtained by observing continuously collected distance images between the eye and the canthus anchoring point. Alternatively, a distance measuring unit may be provided at the corner of the eye anchoring point, and when the measurement value of the distance measuring unit reaches a predetermined threshold, it indicates that the corner of the eye anchoring point and the outer corner of the eye have been successfully positioned.Furthermore, the eye canthus anchoring point is connected to an inclined reflector, and the light source includes a plurality of discretely arranged light bars 13 and a near-infrared light source. The light bars are discretely arranged, and / or each light emitter in the light bar is discretely arranged. The near-infrared light source selectively cooperates with the light bar to assist the operation of the imaging module. The term "selectively" refers to the fact that the near-infrared light source is used in cooperation with the light bar only in a specific measurement mode so that the imaging module can acquire high-precision data of the eye. Because the near-infrared light source and the light bar selectively cooperate with each other, the evaluation device in one embodiment provides a variety of light field conditions and can further satisfy the measurement of multiple parameters, thereby being applicable to multiple measurement modes at low cost and acquiring abundant measurement data. The reflector projects a virtual image of the eye, which facilitates the imaging module to acquire a clear image of the eye. In some measurement scenarios, the imaging module collects virtual images on the reflector to acquire various characteristic images of the eye. Compared with capturing an image of the eye from the front, the tilted reflector can clearly capture the outer contour of the ocular surface (e.g., the contour curve of the protrusion) and detailed features of the eye from the side, particularly under near-infrared light irradiation. At the same time, by adjusting the lighting sequence of the multiple light bars and the characteristics of the near-infrared light source, the longest reflected light from the eye can be collected to provide accurate measurement data for determining the degree of exophthalmos. Furthermore, the above-mentioned capturing process can obtain data such as a first eye position image (front view), a second eye position image (inner, outer, upper, lower), a third eye position image (inner upper, inner lower, outer upper, outer lower), and a video stream of eye activity. Furthermore, through the above-mentioned single measurement process and subsequent image data processing, multiple measurement parameters such as the degree of exophthalmos, palpebral fissure width, eye activity, and conjunctival hyperemia can be simultaneously obtained. The specific measurement process will be described later. As can be seen from the above description, the device in the above embodiment is easy to operate, and after completing the positioning of the outer corner of the eye, the measurement can be completed by simply taking a video or image, and various eye parameters can be obtained through subsequent image processing means, which greatly improves the measurement efficiency and accuracy of data measurement.This technology solves the problems of related technologies, such as high measurement costs, low measurement efficiency, and the inability to measure multiple data simultaneously, while also eliminating side effects such as radiation from the measurement equipment. Furthermore, when measuring exophthalmos, the near-infrared light source is turned on, and the light bar is sequentially controlled to illuminate different positions of the strip light source on the surface of the eye. The camera module is then synchronously controlled to collect a virtual image video stream of the eye in the reflector. The man-machine interaction unit extracts the image frame corresponding to the reflected light from the virtual image video stream in which the longest visible light pillar appears on the eye, and analyzes the data of the extracted image frame to obtain the exophthalmos value. The combination of the near-infrared light source and the light bar creates the necessary light field conditions for the eye. The provision of this light source is crucial for image data collection. In the normal visible light wavelength range of 400 nm to 700 nm, the colors of different parts of the eye, namely the pupil, iris, and sclera, have little effect on image formation, and the gradient structure of the corneal limbus at the contact point between the iris and sclera makes it difficult to accurately identify the center of the eye. Human melanin has an absorption peak at approximately 335 nm and exhibits almost no absorption in wavelengths above 700 nm. The reflectance of the iris is fairly stable in the near-infrared wavelength range above 700 nm. Therefore, by using a near-infrared light field, the present invention can clearly distinguish between the sclera, iris, and pupil boundaries, accurately identify the center of the pupil during subsequent image processing, and improve the effectiveness of exophthalmos measurement. Furthermore, when measuring exophthalmos, the present invention also sequentially turns on a strip-shaped light bar. Compared to a point light source, the strip-shaped light bar provides strip-shaped light with approximately equal intensity, which can ensure that the intensity of the light reflected by the eye is approximately equal. This advantageously presents a clear external contour of the eye on the reflector, making it easier to capture the center of the pupil during subsequent image processing, improving the accuracy and stability of measurement. Specifically, Figure 6 shows a virtual image collected by the reflector. As shown in Figure 6, the virtual image reflects the device of the present invention's ability to clearly collect light reflected from the eye. It is difficult for a frontal view image of the eye to represent the protruding state of the eyeball.More advantageously, the device of the present invention provides more stable measurement data than conventional measuring devices, with smaller differences in values ​​between multiple measurements and smaller data fluctuations (see the comparison data in Table 1 for details). Table 1 shows the statistical results of 10 measurements on four subjects. As can be seen from the data in the table, the device of the present invention can obtain stable measurement data for different subjects, with little change in the standard deviation of the data and high stability. Therefore, the device of the present invention can stably track changes in the subject's data over a long period of time without relying on the experience of the device user, resulting in very reliable measurement results.

[0025] Table 1 Comparison of measurement results between the device of the present invention and related technology [Table 1]

[0026] Preferably, the evaluation device further includes a control unit, which receives commands from the human-machine interaction unit and controls the movement of the canthus anchoring point to abut and position the canthus anchoring point on the outer corner of the eye. In one embodiment, the control unit is integrated into a base and includes multiple sub-control modules to realize different data processing and control needs. In the embodiment shown in FIG. 3, the sub-control modules of the control unit may be respectively provided on the first main board 14 and the second main board 16. The control unit is electrically connected to the human-machine interaction unit to receive control commands sent by an operator and controls the movement of the canthus anchoring point based on the commands, ultimately accurately positioning the canthus anchoring point on the outer corner of the eye.

[0027] Preferably, the light bar and the near-infrared light source are both electrically connected to a control unit. The near-infrared light source selectively cooperates with the light bar by controlling the control unit to turn on the light bar in a predetermined sequence, or to turn on the near-infrared light source, or to control the light bar to turn on in a predetermined sequence and the near-infrared light source to turn on, depending on the measurement mode. In a preferred embodiment, the evaluation device further includes an illumination light source, which may include, but is not limited to, an incandescent lamp. As described above, by selectively turning on the near-infrared light source and forming different light fields in accordance with the light bar, a light field environment that meets usage needs to complete a specific photographing task is created. In one embodiment, the measurement mode includes four modes: an exophthalmos measurement mode, an eye activity measurement mode, a palpebral fissure width measurement mode, and a conjunctival hyperemia measurement mode. In the exophthalmos measurement mode and the eye activity measurement mode, the near-infrared light source and the light bar need to be turned on, while in the conjunctival hyperemia measurement mode, only the lateral indicator light and the illumination light source need to be turned on. The lateral indicator light is a light having an indicating function formed by controlling the light bar to light up in a predetermined manner by a control unit. In the palpebral fissure width measurement mode, the light source that needs to be turned on varies depending on the data post-processing mode selected by the operator. For example, when processing data using a dynamic segmentation algorithm, only the illumination light source needs to be turned on to meet the needs of measuring the palpebral fissure width. When processing data using a semantic segmentation algorithm, only the near-infrared light source needs to be turned on.

[0028] Preferably, the photographing module is electrically connected to the control unit. In response to the on-state of the light bar or the near-infrared light source, the control unit controls the photographing module to collect an eye video stream at the reflector, or to collect a first eye position image, a second eye position image, or a third eye position image, or to collect a video stream of the eye rotation state, depending on the measurement mode. In practice, to accurately measure various eye characteristic data, the photographing module collects different data for different measurement modes. Specifically, for the exophthalmos measurement mode, the light source corresponding to the light source module is turned on, and then the photographing module is controlled to capture a video stream of the eye motionless from the reflector on the side of the eye. For the eye activity measurement mode, the photographing module is first controlled to capture a first eye position image of the subject without turning on the light bar, and then each light bar is turned on in sequence to capture a photograph of the process of the eye rotating along with the light bar. When selecting the semantic segmentation algorithm, it is only necessary to turn on the near-infrared light source and control the capture module to capture a first position image of the eye in the near-infrared light field.In the conjunctival injection and palpebral fissure width measurement mode, it is necessary to turn on the illumination light source and control the capture module to capture a video stream of the eyeball rotating along with the light bar.

[0029] Preferably, the measurement mode is one or more of an exophthalmos measurement mode, an eye activity measurement mode, a palpebral fissure width measurement mode, or a conjunctival hyperemia measurement mode. As can be seen, the technical solution of one embodiment aims to solve the problem that related art devices cannot simultaneously measure one or more types of eye data at low cost. Accordingly, the measurement device of this embodiment integrates two light sources: a light bar and a near-infrared light source. In another embodiment, the measurement device further includes an illumination light source such as an incandescent lamp. After an operator selects a corresponding measurement mode, the control unit controls the corresponding light sources to cooperate with each other based on the selected measurement mode to create a light field environment that meets the operating needs of the imaging module, and further enables the imaging module to capture the required data. Specifically, in the exophthalmos measurement mode, the near-infrared light is turned on, and then the light bar is controlled to light up sequentially (e.g., from left to right or from right to left), and the imaging module is controlled to take a photo of the left or right eye in front of the eye (with the eye motionless). When the longest reflected light of the visible light pillar appearing on the eyeball in the mirror is obtained from the photograph, the image data is analyzed and processed to determine the corneal apex, and the pupil center is determined using a neural network. The degree of exophthalmos is calculated based on the optical center position of the photographing unit, the position of the corner of the eye's outer corner, the tilt angle of the mirror, the corneal apex, and the pupil center, and the tilt angle of the mirror is the included angle between the mirror and the imaging plane.In the eye activity measurement mode, after turning on the near-infrared light, the light bar is controlled to sequentially light up eight indicator lights in a clockwise (or counterclockwise) direction (e.g., the eight directions indicated by an American compass), and the subject controls their eyes to move in accordance with the indicator lights based on voice commands. The photographing module photographs a first eye position image (frontal gaze), a second eye position image (inward, outward, upward, downward, or the four directions of up, down, left, and right on the American compass), and a third eye position image (inward-upward, inward-downward, outward-upward, outward-downward, or the northeast, southeast, northwest, and southwest directions on the American compass) when the subject's eyes move to their limit positions along the direction to be measured. The first eye position image (frontal gaze) is compared with the second eye position image and the third eye position image, respectively, to calculate the activity angle of the eye activity. In the dynamic segmentation measurement mode for palpebral fissure width, the light bar is controlled to light up sequentially (from left to right or right to left), and the subject rotates their eyeball left and right according to the tracking point as instructed by the indicator light. At the same time, the capture module captures a 20-second video stream. At the later stage, a neural network is used to segment each frame of the video stream into static and dynamic intersection points, and the eyelid contour is obtained by the set of intersection points. The palpebral fissure width is then obtained by calculating the vertical distance of the eyelid contour on the pupil center line. In the semantic segmentation measurement mode for palpebral fissure width, a near-infrared light source is first turned on to form a 700-1200 nm near-infrared light field in the imaging area, and a first eye position image of the subject's eye in the near-infrared light field is captured using a photography module. A neural network training method is then used to segment the background, iris, sclera, and pupil from the first eye position image, obtain the pupil center from the segmented pupil, and obtain the vertical pupil centerline. The distance between the intersection of the pupil centerline with the sclera, iris, or pupil and the background is then calculated to obtain the palpebral fissure width. In the conjunctival hyperemia measurement mode, the subject rotates their eyeball left and right according to the tracking point indicated by the indicator light, capturing a video stream. Finally, the video stream is segmented to obtain an eye image. The red and blue channel values ​​of each pixel are extracted from the eye image, and the percentage of conjunctival hyperemia is determined based on the ratio of the red and blue channel values ​​of each pixel.

[0030] Preferably, the wavelength of the near-infrared light source is 700 nm to 1200 nm. Analysis of data acquired by the imaging module reveals that when the visible light wavelength band is 400 nm to 700 nm, the colors of different parts of the eye, such as the pupil, iris, and sclera, have little effect on imaging. Due to the gradient structure of the limbus at the contact point between the iris and sclera, illuminating the eye with light in this wavelength band makes it difficult to accurately identify the center of the eye from the imaging data. Through multiple experimental verifications, the inventors found that the eye absorbs very little light in wavelength bands above 700 nm, and that the reflectance of the iris is fairly stable in near-infrared wavelength bands above 700 nm. Therefore, in one embodiment, the use of a near-infrared light field can effectively distinguish the boundaries of the sclera, iris, and pupil, thereby improving the accuracy and stability of the algorithm. Therefore, in this embodiment, by setting the wavelength of the near-infrared light source to 700 nm to 1200 nm, the accuracy of measuring the degree of exophthalmos, the degree of eye activity, or the palpebral fissure width can be significantly improved.

[0031] Preferably, the evaluation device further includes a forehead rest 6 and a chin support 2, the forehead rest connected to a horizontally moving platform 7, the control unit electrically connected to the horizontally moving platform to adjust the forehead rest's front-to-back position, and the chin support connected to a vertically moving platform 1, the control unit electrically connected to the vertically moving platform to adjust the chin support's up-down position. In the embodiment shown in FIG. 3, independent moving platforms are provided for the chin support and the forehead rest, respectively, to control the subject's head position, thereby initially aligning the subject's eyes with the canthus anchoring point. Further, the canthus anchoring point's moving platform, such as the left displacement platform 3 or the right displacement platform 12, can be used to more precisely adjust the canthus anchoring point to accurately position the outer corner of the eye. This two-stage adjustment process improves the efficiency and accuracy of locating the outer corner of the eye.

[0032] Preferably, there are two of the canthus anchoring points and two of the reflecting mirrors, each located on the left and right sides of the measurement unit. In the embodiment shown in Figures 1 to 3, the canthus anchoring points include a left canthus anchoring point 4 and a right canthus anchoring point 10, and the reflecting mirrors also include two, a left mirror 5 and a right mirror 11. By providing the above components separately on the left and right sides of the measurement unit, it is possible to measure both of the subject's eyes simultaneously. The reflecting mirrors are tilted at the canthus anchoring points to form virtual images corresponding to the eyeballs. As shown in Figure 3, the two reflecting mirrors are tilted outward from the axis of the human face, so that the reflective surfaces of the reflecting mirrors can be aligned with the imaging module, allowing the imaging module to capture the virtual image on the reflecting mirrors.

[0033] Preferably, the imaging module includes two area cameras 8, one on the left and one on the right, and / or two near-infrared lights 9, located on both sides of the measurement unit. Two sets of cameras and two sets of near-infrared lights are provided, each corresponding to one eye, to provide sufficient illumination to the measurement target eye and improve the image capture effect of the corresponding eye. In one embodiment, the captured data is post-processed to obtain various required measurement results, and the accuracy of the measurement results is related to the accuracy of the captured data. Therefore, in one embodiment, the resolution and accuracy of the 2D image captured using the area cameras are improved.

[0034] Preferably, the base 22 is provided with a card slot 27 and / or multiple types of communication interfaces. As shown in FIGS. 1 and 2, the card slot includes, but is not limited to, a card slot for inserting a social security card. The card slot is electrically connected to the card reader module 15 in the base. Corresponding communication interfaces include, but are not limited to, a network connection port 26, a USB interface 25, etc. Of course, for ease of operation of the device, a corresponding power switch 24 and power interface 23 are provided on the same side as the communication interface. The power interface is connected to a power source 18. As can be appreciated, other types of I / O interfaces may be integrated into the device base, and the I / O interfaces may be connected to input units including a keyboard, a mouse, etc., output units including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and speakers, storage units including a hard disk, etc., and communication units including a network interface card such as a LAN card or a modem. The communication unit processes communication via a network such as the Internet. Drives may also be connected to the I / O interfaces as needed. Removable media such as magnetic disks, optical disks, magneto-optical disks, and semiconductor memories are installed in a driver as needed, and computer programs read from the driver are installed in a storage unit as needed.

[0035] The above specific embodiments do not limit the scope of protection of the present invention. As can be understood by those skilled in the art, various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included within the scope of protection of the present invention.

Claims

1. An eye parameter evaluation device including a measurement unit and a man-machine interaction unit, both of which are provided on a base, The measurement unit includes at least one photographing module, at least one eye corner anchoring point, and a light source module; The imaging module collects eye data; The man-machine interaction unit adjusts the position of the canthus anchoring point so that the canthus anchoring point is positioned at the outer corner of the eye, and the canthus anchoring point is connected to an inclined reflecting mirror so that the photographing module collects a virtual image of the side of the eye by the reflecting mirror; the light source module includes a plurality of discretely arranged light bars and a near-infrared light source for providing a near-infrared light field; After turning on the near-infrared light source, sequentially control the lighting order of the light bars to illuminate the strip-shaped light sources at different positions on the surface of the eyeball, and synchronously control the photography module to collect a virtual image video stream of the eye on the reflecting mirror, and the man-machine interaction unit extracts an image frame corresponding to the reflected light from the virtual image video stream at which the longest visible light pillar appears on the eyeball, and obtains a numerical value of exophthalmos as an eye parameter by analyzing the data of the extracted image frame. An eye parameter evaluation device characterized by:

2. The control unit further includes a control unit that receives a command received by the man-machine interaction unit, controls the movement of the eye corner anchoring point, and positions the eye corner anchoring point by contacting it with the outer corner of the eye.

2. The eye parameter evaluation device according to claim 1.

3. The light bar and the near-infrared light source are both electrically connected to a control unit; The control unit In a dynamic division measurement mode of the palpebral fissure width as the eye parameter, turning on only the light bar in a predetermined order; In a semantic segmentation measurement mode of the palpebral fissure width, only the near-infrared light source is turned on; In an exophthalmos measurement mode or an eye activity measurement mode as the eye parameter, control is performed so that the light bar is turned on in a predetermined order after the near-infrared light source is turned on.

3. The eye parameter evaluation device according to claim 2.

4. the imaging module is electrically connected to the control unit; The control unit In the dynamic segmentation measurement mode of the palpebral fissure width, controlling the photographing module to collect a video stream of an eyeball rotation state; In the semantic segmentation measurement mode of the palpebral fissure width, controlling the image capture module to capture a first eye position image of the subject's eye in the near-infrared light field from a front view of the eyeball; In the exophthalmos measurement mode, controlling the photographing module to photograph the first eye position image; controlling the photographing module so as to photograph eye position images before and after the eye moves from a center position to a limit position along a measurement target direction in the eye activity measurement mode; 4. The eye parameter evaluation device according to claim 3.

5. The wavelength of the near-infrared light source is 700 nm to 1200 nm.

2. The eye parameter evaluation device according to claim 1.

6. further comprising a forehead rest and a chin support; the forehead rest is connected to a horizontally moving platform, and the control unit is electrically connected to the horizontally moving platform to adjust the front-to-back position of the forehead rest; the chin support is connected to a vertically moving platform, and the control unit is electrically connected to the vertically moving platform to adjust the vertical position of the chin support.

3. The eye parameter evaluation device according to claim 2.

7. There are two of the eye corner anchoring points and two of the reflecting mirrors, which are arranged on both the left and right sides of the measuring unit, respectively; The reflecting mirror is provided at an angle to the canthus anchoring point to form a virtual image corresponding to the eyeball.

2. The eye parameter evaluation device according to claim 1.

8. The photographing module includes two area cameras arranged on the left and right, and / or there are two near-infrared lights, and they are arranged on both sides of the measuring unit; 2. The eye parameter evaluation device according to claim 1.

9. The base is provided with a card slot and / or multiple types of communication interfaces; 2. The eye parameter evaluation device according to claim 1.

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