• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Eyelid laxity meter. The present invention refers to a device that allows the measurement of the tension carried out on the lower eyelids of a human eye in order to know its elasticity characteristics. Its usefulness is to know the impact of this laxity on the eyelid biomechanics, which translates into the appearance of symptoms characterized by nonspecific discomfort, a sensation of dryness and excessive tearing. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2824298A1
    申请号:ES202031122
    申请日:2020-11-06
    公开日:2021-05-11
    发明作者:Vilaboa Ricardo Bernárdez；Verdejo José Luis Hernández；Montero María García；Benavides Javier González-Cavada；Garrido Francisco Luis Prieto；Lumeras Miguel Angel Estrella；Florentín Gema Martínez；Costa David Madrid
    申请人:Universidad Complutense de Madrid；
    IPC主号:
    专利说明:

    [0002] Eyelid laxity meter
    [0004] TECHNICAL SECTOR
    [0006] The invention falls within the field of eyelid dynamics optometry, specifically in the provision of reproducible metrics of laxity and / or flexibility of the eyelids. Its application is aimed at the control and improvement of the quality of vision and quality of life in the field of primary eye care, optometric and ophthalmology.
    [0008] BACKGROUND OF THE INVENTION
    [0010] The dynamics of the eyelids play a crucial role in maintaining the health of the eye. Its repeated movement (blinking) has various physical and physiological protective functions. The uniform distribution of the tear film, the activation of the lipid secretion of the sebaceous glands located along the upper and lower eyelids and the generation of the fluid dynamics necessary to provoke the continuous exchange through the elimination of part of its volume through the tear ducts make up a dynamic system that must be in perfect balance with the biomechanical properties of the eyelids.
    [0012] Over time, the tonicity or elasticity of the eyelids together with the accumulation of fat around them can negatively impact the eyelid biomechanics, which translates into the appearance of symptoms characterized by nonspecific discomfort, a sensation of dryness and excessive tearing . Extreme cases cause the appearance of eyelid pathologies such as entropion (eyelid inward) or ectropion (eyelid outward). In all these conditions, the eyelid dynamics is altered in one way or another.
    [0014] Traditionally, slit lamp biomicroscopy is the technique used to explore the integrity of the eyelids. The magnified presentation of the ocular structures together with other quality and quantity tests of tear production (Schirmer's test, phenol red test, lysamine green test, etc ...) help the clinician to guide his diagnosis.
    [0015] Recently, ocular surface analysis systems such as specialized surveyors offer more precise analysis tools for tear dynamics and, in essence, the health of the ocular surface.
    [0017] There are no instruments specially designed to measure the properties of elasticity and / or palpebral laxity. In clinical practice indirect strategies are used such as manual traction and the assessment of the ability to recover the position, and other occurrences that help the clinician to assess the degree of involvement of the eyelids in the diagnostic context.
    [0019] EXPLANATION OF THE INVENTION
    [0021] Eyelid laxity meter
    [0023] The present invention refers to a device that makes it possible to evaluate the laxity and extensibility of the eyelids, especially the lower portion thereof, providing a reproducible metric.
    [0025] For this, one aspect of the present invention refers to the joint use of a digital probe measurement system and an infrared distance measurement system or infrared ruler. Both systems are interconnected and collimated in the measurement area, which in this case is the lower eyelid.
    [0027] The device of the invention includes a box in which the infrared ruler is collected, which may include anchoring elements to position it in front of the subject's eyelid in order to ensure an accurate measurement. Connected to the infrared ruler by means of an extension cable, there is the digital probe that includes, at least, 3 arms terminated, each one of them, in a clamp. The two elements of each clamp are opened and closed by means of a spring.
    [0029] The device also includes a spring, with a determined elasticity constant and located at the end of each arm of the digital probe, and a sensor to measure the elongation of the spring by directly measuring the displacement due to the traction exerted on the eyelid. The displacement, measured in microns, translates directly to units of force exerted on the lower eyelid tissue.
    [0031] The downward displacement of the eyelid as a consequence of the force exerted by the digital probe exposes a lower area of the eyeball (visible bulbar conjunctiva) which will be proportional to the force exerted. The collimated infrared ruler accurately measures the eyelid displacement distance in the direction of the force exerted by the stylus. The displacement measured by the infrared ruler, together with the force exerted on the eyelid by the eyelid laxity meter compared to the force that, in a healthy person, does not produce significant changes in the position of the eyelid, provides a reproducible data with which to know the elasticity and / or palpebral laxity of the subject under study.
    [0033] The internal wiring that runs inside the arms of the digital probe ends up joining a gear made up of toothed wheels to which a zero regulator is also attached. On the other hand, the measurement data obtained is displayed on an external screen that receives power from a power source included in the device, and that also powers the infrared ruler.
    [0035] Therefore, one aspect of the present invention relates to an eyelid laxity meter that includes:
    [0036] - a digital probe formed by at least 3 arms in which each of the arms is finished in a gripper;
    [0037] - a set of toothed wheels that form a gear;
    [0038] - a zero regulator connected to the gear;
    [0039] - an external digital display;
    [0040] - an infrared ruler;
    [0041] - a source of energy;
    [0042] - an internal wiring that goes through the inside of the arms of the digital probe and joins a spring located in each of the clamps (which we call the clamp spring) with a force spring adjacent to each of the toothed wheels closest to the probe digital and ends up attached to each of the cogwheels closest to the digital papador;
    [0043] - a sensor located along the internal wiring that runs inside the arms.
    [0045] A battery pack, a rechargeable battery or a battery can be used as the power source. voltage cable to the usual electricity network. Furthermore, the elements of the device can be made of wood, metal or plastic.
    [0047] BRIEF DESCRIPTION OF THE DRAWINGS
    [0049] The attached drawings show, for illustrative and non-limiting purposes, the eyelid laxity meter:
    [0051] Figure 1. Schematic view of the exterior of the eyelid laxity meter.
    [0053] Figure 2. Schematic view of the interior of the eyelid laxity meter.
    [0055] Below is a list of the different elements represented in the figures that are integrated into the invention:
    [0057] 1: box
    [0058] 2: external display
    [0059] 3: regulator to zero
    [0060] 4: sensor
    [0061] 5: digital probe (it is the set formed by the following elements)
    [0062] 51: arm
    [0063] 52: clamp
    [0064] 53: caliper spring or second spring
    [0065] 6: sprockets
    [0066] 7: internal wiring
    [0067] 8: spring
    [0068] 9: infrared ruler
    [0069] 10: power source
    [0071] PREFERRED EMBODIMENT OF THE INVENTION
    [0073] The present invention is further illustrated by the following examples, which are not intended to be limiting of its scope.
    [0074] Example 1.
    [0076] A box (1) 100 mm long, 40 mm high and 10 mm wide was manufactured in polyethylene terephthalate (PET), with an external screen (2) of 80x30 mm specially designed for the device, where shows, in digital numbering as schematized in figure 1, the force developed in the pressure exerted on the lower eyelid when the device is used; and a zero regulator (3) to reset the entire device to zero before starting the next measurement. The zero regulator (3) was made with an external part 5 mm long by 3 mm in diameter in a cylindrical shape, with grooves for better grip, and a 60 mm extension inside the box (1) to readjust the set of toothed gears (6) arranged inside the box (1).
    [0078] The toothed wheels (6) were also manufactured in PET and were made of different total diameters (20 mm for the large, 15 mm for the intermediate ones and 10 mm for the smallest) depending on the part of the eyelid laxity meter to be moved. In the smaller toothed wheels (6) the internal wiring (7) was attached to manipulate the digital probe (5). The cables were chosen from stainless steel, with a diameter of 1 mm. As shown in the diagram of figure 2, from each of the smaller toothed wheels (3) a cable was arranged that was attached to a force spring (8) that allows the manipulation of the arms ( 51), which are part of the digital probe (5), when you want to pull the eyelids to be measured. These arms (51) were made with PET with a diameter of 3 mm and a length of 30 mm. and each one was finished in a clamp (52) where each part of the clamp (52) was given an ovoid shape with a length of 7 mm and a width of 4 mm (in the highest part of the curve). Inside each arm (51) a sensor (4) was placed along the arm (51) and around the internal wiring (7), with a surface of 2 mm in diameter and a length of 30 mm. The sensor (4) measures the elongation of the force spring (8) and, therefore, the displacement due to the traction exerted on the eyelid. Between the two ovoid shapes of each clip (52) a second spring (53) was placed with the function of joining and separating the two parts of the clip. This second spring (53) was chosen with a length of 5 mm when gathered and a width of 3 mm and was connected to the force spring (8) by means of the internal wiring (7).
    [0080] The intermediate sprockets meshed with the small ones and connected with the zero regulator (3). On the other hand, the large sprocket is used to move the three intermediate wheels and is toothed with the intermediate wheel controlled by the zero regulator (3), as shown in the diagram of figure 2.
    [0082] The last element that was incorporated on the outside of the box (1), but with part of it inside, was an infrared ruler (9) that was made of the same material (PET) and was connected to a battery as a source. power supply (10), to which the external screen (2) was also connected, to receive operating power.
    [0084] Example 2.
    [0086] The device of Example 1 was used to measure the eyelid laxity of the lower eyelid of 5 healthy young people in order to know the force / weight supported by the healthy lower eyelid before moving away from the eyeball. The results obtained were in the range of 5-6 mN.
    [0088] To perform the measurements, the lower eyelid of each individual was held with the forceps (52), traction force was exerted thanks to the springs (53 and 8) and the displacement of the eyelid was precisely determined by means of the infrared ruler. (9).
    权利要求:
    Claims (4)
    [1]
    1. Eyelid laxity meter that includes:
    - a digital probe (5) formed by at least 3 arms (51) each of said arms (51) finished in a gripper (52);
    - a set of toothed wheels (6) forming a gear;
    - a zero regulator (3) connected with the gear;
    - an external digital display (2);
    - an infrared ruler (9);
    - a power source (10);
    - An internal wiring (7) that goes through the inside of the arms (51) of the digital probe (5) and joins a spring located in each of the clamps (52) or spring of the clamp (53) with a force spring (8) adjacent to each one of the gear wheels (6) closest to the digital probe (5) and ends attached to each one of the gear wheels (6) closest to the digital probe (5);
    - a sensor (4) located along the internal wiring (7) that runs inside the arms (51).
    [2]
    2. Eyelid laxity meter according to claim 1 in which the power source (10) is selected from the group consisting of: a set of batteries, a rechargeable battery or a cable from the voltage to the usual electricity network.
    [3]
    3. Eyelid laxity meter according to any of the preceding claims, the elements of which are made of wood, metal or plastic.
    [4]
    4. Eyelid laxity meter according to claim 3, the elements of which are made of polyethylene terephthalate (PET).
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    同族专利:
    公开号 | 公开日
    ES2824298B2|2021-11-16|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CN103705205A|2012-09-29|2014-04-09|上海中医药大学附属普陀医院|Inferior palpebral margin pressure detector|
    KR20150055905A|2013-11-14|2015-05-22|최승우|Device for measuring the muscular strength of eyelid|
    法律状态:
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    ES202031122A|ES2824298B2|2020-11-06|2020-11-06|Eyelid laxity meter|ES202031122A| ES2824298B2|2020-11-06|2020-11-06|Eyelid laxity meter|
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