Strabismus measuring instrument

Abstract

The utility model relates to the technical field of ophthalmology examination instruments, and provides a strabismus measuring instrument which comprises a shell, a measuring window and a camera, the measuring window is embedded in the outer surface of the shell and comprises an electrochromic unit and a control unit, and the electrochromic unit is connected with the camera. The electrochromic unit comprises a shielding area which selectively shields one or two eyes of an observer in a power-on state, and the control unit is used for controlling the shielding area to shield the eyes of the observer; the camera is disposed inside the housing for recording a plurality of images of at least one eye of the observer observing the visual stimulation. According to the scheme, the electrochromic unit is used for shielding light to shield the eye area, the influence of the moving process of the baffle on the watching angle of a patient in the matching process of the servo motor and the baffle is avoided, therefore, the visual traction influence is effectively solved, and due to the fact that the servo motor does not need to be used, the visual effect is improved. And the eye shielding process is quiet and rapid.

Description

Technical Field

[0001] This disclosure relates to the field of ophthalmic examination instruments, and in particular to a strabismus measuring instrument. Background Technology

[0002] Strabismus is a common clinical eye condition affecting 2% to 5% of the population. Patients with strabismus cannot properly coordinate their eyes when using them for vision. Eye misalignment is a common feature in strabismus patients. When making eye contact with a patient, the misalignment of their eyes may cause confusion for others.

[0003] Strabismus is not only a cosmetic defect, but it also triggers a wide range of visual impairments, such as diplopia, amblyopia, and impaired stereopsis, leading to impaired motor skills, especially during visual-motor tasks such as grasping or postural stability. In addition, strabismus can have a range of negative psychological and mental effects on patients.

[0004] In related technologies, in order to achieve strabismus measurement, a servo motor and a baffle are usually used to block the patient's eyes. However, as the baffle moves with the servo motor, it may affect the patient's fixation angle, thus affecting the strabismus detection results. In addition, there is often some noise during the movement of the baffle and the servo motor.

[0005] Therefore, how to address the influence of visual traction during strabismus measurement of patients / observers using a strabismus measuring instrument is a technical problem that urgently needs to be solved. Utility Model Content

[0006] One of the technical problems this disclosure aims to solve is: how to address the visual traction effect during strabismus measurement of an observer.

[0007] To address the aforementioned technical problems, in a first aspect, this utility model provides a strabismus measuring instrument, comprising: a housing, a measuring window, and a camera. The measuring window is embedded in the outer surface of the housing, and includes an electrochromic unit and a control unit. The electrochromic unit includes an occlusion area that selectively blocks one or both eyes of the observer when powered on, and the control unit is used to control the occlusion area to complete the occlusion of the observer's eyes. The camera is disposed inside the housing and is used to record multiple images of at least one eye of the observer observing visual stimuli.

[0008] In conjunction with the first aspect, in one possible implementation of the first aspect, the electrochromic unit includes at least one interlayer.

[0009] In conjunction with the first aspect, in one possible implementation of the first aspect, each interlayer is filled with a corresponding electrolyte, and the electrolyte is configured to cause the corresponding blocking area of ​​the electrochromic unit to complete the color change blocking after energization.

[0010] In conjunction with the first aspect, in one possible implementation of the first aspect, the electrolyte is at least configured to shield visible light and high-projection near-infrared light of a preset wavelength band.

[0011] In conjunction with the first aspect, in one possible implementation of the first aspect, each occlusion region includes at least two occlusion region ranges.

[0012] In conjunction with the first aspect, in one possible implementation of the first aspect, the strabismus measuring instrument further includes: a forehead support and a chin support, wherein the forehead support is positioned above the test window and the chin support is positioned below the test window, with the forehead support and chin support positioned opposite each other.

[0013] In conjunction with the first aspect, in one possible implementation of the first aspect, the measurement window is divided into at least two occlusion regions by a line connecting the first center point of the forehead rest and the second center point of the jaw rest.

[0014] In conjunction with the first aspect, in one possible implementation of the first aspect, the jaw support includes an adjustment switch configured to adjust the height of the jaw support.

[0015] In conjunction with the first aspect, in one possible implementation of the first aspect, the test window is set such that the size of each occluded area is adjusted proportionally to the position of the chin rest.

[0016] In conjunction with the first aspect, in one possible implementation of the first aspect, the strabismus measuring instrument further includes: an infrared illuminator configured to illuminate the observer's eyes.

[0017] Through the above technical solution, this disclosure provides a strabismus measuring instrument, which includes: a housing, a measuring window, and a camera. The measuring window is embedded in the outer surface of the housing and includes an electrochromic unit and a control unit. The electrochromic unit selectively blocks the occlusion area of ​​one or both eyes of the observer when powered on. The control unit controls the occlusion area to complete the occlusion of the observer's eyes. The camera is located inside the housing and is used to record multiple images of at least one eye of the observer observing visual stimuli. In this process, the electrochromic unit shields light to achieve occlusion of the eye area, avoiding the influence of the movement of the baffle on the patient's gaze angle during the cooperation between the servo motor and the baffle, thus improving the accuracy of the test results and effectively solving the problem of visual traction. Furthermore, since no servo motor is needed, and the occlusion of the eye area is completed solely by the electrochromic unit, the eye occlusion process is quiet and rapid, achieving noiseless instantaneous occlusion and creating the same and better acquisition conditions. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a strabismus measuring instrument disclosed in an embodiment of this disclosure.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1-Housing shell; 11-Measuring window; 12-Forehead support; 13-Chin support; 131-Adjustment switch. Detailed Implementation

[0022] The embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of this disclosure by way of example, but should not be used to limit the scope of this disclosure. This disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0023] These embodiments are provided to make the disclosure thorough and complete, and to fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0024] It should be noted that, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationship, are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] Furthermore, the terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after the word, and do not exclude the possibility of encompassing other elements as well.

[0026] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure depending on the specific circumstances. When a particular device is described as being located between a first device and a second device, an intermediary device may or may not be present between the particular device and the first or second device.

[0027] All terms used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0028] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0029] like Figure 1 As shown, this utility model discloses a strabismus measuring instrument, including: a housing 1, a measuring window 11, and a camera, wherein,

[0030] The measurement window 11 is embedded in the outer surface of the housing 1. The measurement window 11 includes an electrochromic unit and a control unit. The electrochromic unit includes an occlusion area that can selectively cover one or both eyes of the observer when powered on. The control unit is used to control the occlusion area to complete the occlusion of the observer's eyes. The camera is set inside the housing 1 and is used to record multiple images of at least one eye of the observer observing visual stimuli.

[0031] Specifically, the electrochromic unit serves as a near-infrared filter for the measurement window 11. When powered on, the electrochromic unit blocks light, thus obscuring the observer's eyes. The selection of the obscuring area for one or both eyes is controlled by the control unit. Upon receiving a corresponding control command, the control unit controls the electrochromic unit to change color and block the observer's eyes. The electrochromic unit includes dimming glass or other devices that can change color and block light when powered on, possessing the characteristics of shielding visible light and targeting a preset wavelength of near-infrared light, such as near-infrared light in the 800-1100nm band.

[0032] Specifically, the number of cameras is usually 2n+1, where n is a positive integer. For example, when n is 1, there are three cameras. One camera is used to record images of the eye occlusion areas corresponding to the left and right eyes, and another camera is set in the middle of the housing 1. The distance between each camera is the same, for example, 89mm.

[0033] Specifically, based on the property of near-infrared filters to block visible light, the observer's field of view can be obstructed, and visual inspection can confirm that the observer cannot obtain a residual view of the target through the near-infrared blocker. The use of near-infrared filters allows the covered eye to be "visualized" using a camera. The camera can capture light in the near-infrared band through the near-infrared blocker, allowing the image of the covered eye to be captured.

[0034] Through the above technical solution, this disclosure provides a strabismus measuring instrument, which includes: a housing, a measuring window, and a camera. The measuring window is embedded in the outer surface of the housing and includes an electrochromic unit and a control unit. The electrochromic unit selectively blocks the occlusion area of ​​one or both eyes of the observer when powered on. The control unit controls the occlusion area to complete the occlusion of the observer's eyes. The camera is located inside the housing and is used to record multiple images of at least one eye of the observer observing visual stimuli. In this process, the electrochromic unit shields light to achieve occlusion of the eye area, avoiding the influence of the movement of the baffle on the patient's gaze angle during the cooperation between the servo motor and the baffle, thus improving the accuracy of the test results and effectively solving the problem of visual traction. Furthermore, since no servo motor is needed, and the occlusion of the eye area is completed solely by the electrochromic unit, the eye occlusion process is quiet and rapid, achieving noiseless instantaneous occlusion and creating the same and better acquisition conditions.

[0035] In some alternative embodiments, the electrochromic unit includes at least one interlayer.

[0036] Specifically, an electrochromic unit including at least one interlayer means that the electrochromic unit has at least one intermediate layer, and each intermediate layer contains the same or different substances so that the electrochromic unit can achieve an eye area blocking effect after being powered on.

[0037] In some alternative embodiments, each interlayer is filled with a corresponding electrolyte, which is configured to cause the corresponding blocking area of ​​the electrochromic unit to complete the color change blocking after energization.

[0038] Specifically, each interlayer has a corresponding electrolyte, meaning that each intermediate layer contains the same or different electrolytes. The different electrolytes refer to near-infrared light medium electrolytes with different boundary ranges in each intermediate layer. This allows for shielding of different light sources based on the near-infrared light medium electrolyte after the electrochromic unit is energized. Furthermore, depending on the testing requirements, different interlayers can be energized to meet the shielding needs of single or multiple light sources.

[0039] In some alternative embodiments, the electrolyte is configured to at least shield visible light and high-projection near-infrared light of a preset wavelength band.

[0040] Specifically, the electrolyte is configured to at least shield visible light and high-transmission near-infrared light of a preset wavelength band. This means that the electrolyte, as a near-infrared light medium, shields high-transmission near-infrared light of a corresponding preset wavelength band, as well as visible light, based on the boundary range of the near-infrared light medium electrolyte. For example, it shields visible light and near-infrared light in the 800-1100nm wavelength band.

[0041] In some alternative embodiments, each occlusion region includes at least two occlusion region ranges.

[0042] Specifically, each occlusion area includes at least two occlusion area ranges, meaning that each occlusion area includes at least a fully occluded area range and a partially occluded area range. The partially occluded area range also includes: adjusting the partially occluded area range using input control parameters.

[0043] Specifically, adjusting the range of partially obscured areas using input control parameters means partially obscuring each obscured area based on its location relative to the patient's eye region, taking into account the area and location of the obscured area.

[0044] In some optional embodiments, the strabismus measuring instrument further includes: a forehead support 12 and a jaw support 13, wherein the forehead support 12 is positioned above the test window 11 and the jaw support 13 is positioned below the test window 11, with the forehead support 12 and the jaw support 13 positioned opposite each other.

[0045] Specifically, the forehead support 12 is used to place the patient's forehead against the corresponding area of ​​the forehead support 12, and the jaw support 13 is used to support the patient's chin against the corresponding area of ​​the jaw support 13. Thus, the position of the patient's head is fixed by the forehead support 12 and the jaw support 13, which is beneficial for the measurement of the instrument.

[0046] In some alternative embodiments, the measurement window 11 is divided into at least two occlusion areas by a line connecting the first center point of the forehead support 12 and the second center point of the jaw support 13.

[0047] Specifically, dividing the measurement window 11 into at least two occlusion regions by connecting the first center point of the forehead support 12 and the second center point of the chin support 13 means using the line connecting the first and second center points as the midline of the electrochromic unit to form two eye occlusion regions. Further, based on this, for example, the two eye occlusion regions can be further divided at equal intervals, either horizontally or vertically, to form four eye occlusion regions.

[0048] In some alternative embodiments, the jaw support 13 includes an adjustment switch 131 configured to adjust the height of the jaw support 13.

[0049] Specifically, the adjustment switch 131 fixes the jaw support 13 by means of, for example, a snap, pin, or magnetic attraction, and gives the jaw support 13 a vertical movement range, thereby achieving adjustment of the height of the jaw support 13.

[0050] In some alternative embodiments, the test window 11 is configured such that the size of each occluded area is proportionally adjusted according to the position of the chin rest 13.

[0051] Specifically, the change in the position of the chin rest 13 signifies a change in the patient's eye position. The original bottom area of ​​each eye-obstructing region will be adjusted according to the patient's eye position. Therefore, based on a preset correspondence, the original bottom area is reduced, meaning the electrochromic unit in the corresponding area is de-energized, thus canceling light shielding at that location. For example, if a certain eye-obstructing region has a length of c and a width of d, after the chin rest 13 rises a height a, according to the preset correspondence, the length of that eye-obstructing region decreases by e. That is, after the chin rest 13 rises a height a, the length of that eye-obstructing region becomes ce, and the width becomes d.

[0052] In some alternative embodiments, the strabismus measuring instrument further includes an infrared illuminator configured to illuminate the observer's eyes.

[0053] Specifically, the eye can be illuminated by an infrared LED, such as an 850nm wavelength infrared LED, which is invisible to the observer, thus enabling recording without distracting the subject. The radiation intensity of the LED can be measured using an optical power meter (PM400, Thorlabs, USA) to keep it well below the level of exposure risk. Therefore, the camera can record multiple images of at least one eye of the observer viewing the visual stimulus.

[0054] The embodiments of this disclosure have now been described in detail. To avoid obscuring the concept of this disclosure, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0055] While specific embodiments of this disclosure have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner.

Claims

1. A strabismus measuring instrument, characterized in that, include: The housing (1), the measuring window (11), and the camera, wherein, The measurement window (11) is embedded in the outer surface of the housing (1). The measurement window (11) includes an electrochromic unit and a control unit. The electrochromic unit includes an occlusion area that can selectively cover one or both eyes of the observer when powered on. The control unit is used to control the occlusion area to complete the occlusion of the observer's eyes. The camera is disposed inside the housing (1) and is used to record multiple images of at least one eye of the observer observing visual stimuli.

2. The strabismus measuring instrument according to claim 1, characterized in that, The electrochromic unit includes at least one interlayer.

3. The strabismus measuring instrument according to claim 2, characterized in that, Each of the interlayers is filled with a corresponding electrolyte, which is configured to cause the blocking area corresponding to the electrochromic unit to change color and block after being energized.

4. The strabismus measuring instrument according to claim 3, characterized in that, The electrolyte is configured to at least shield visible light and high-projection near-infrared light in a preset band.

5. The strabismus measuring instrument according to claim 1, characterized in that, Each of the occlusion regions includes at least two occlusion region ranges.

6. The strabismus measuring instrument according to claim 1, characterized in that, The strabismus measuring instrument also includes: a forehead support (12) and a jaw support (13), wherein... The forehead support (12) is positioned above the measuring window (11), and the jaw support (13) is positioned below the measuring window (11). The forehead support (12) and the jaw support (13) are positioned opposite each other.

7. The strabismus measuring instrument according to claim 6, characterized in that, The measuring window (11) is divided into at least two occlusion areas by connecting the first center point of the forehead support (12) and the second center point of the jaw support (13).

8. The strabismus measuring instrument according to claim 6, characterized in that, The jaw support (13) includes an adjustment switch (131) configured to adjust the height of the jaw support (13).

9. The strabismus measuring instrument according to claim 8, characterized in that, The measurement window (11) is set to adjust the size of each occluded area proportionally to the position of the jaw support (13).

10. The strabismus measuring instrument according to claim 1, characterized in that, The strabismus measuring instrument also includes an infrared illuminator configured to illuminate the observer's eyes.

Images