Meibomian gland pressing device

Abstract

The application discloses a meibomian gland pressing device, which comprises a flexible capsule, a shell and an eyelid cup. The flexible capsule comprises first and second flexible capsules for contacting the eyelid; the shell is used for supporting the flexible capsule; the eyelid cup is connected with the shell and is used for supporting the eyelid and isolating and protecting the eyeball. The first and second flexible capsules each comprise a pressing part; the pressing part is formed as an inclined surface structure to abut the eyelid in turn along the direction from the blind end to the opening of the meibomian gland in the operation of the device, so that progressive pressing is realized; or the pressing part comprises a first pressing area corresponding to the blind end of the meibomian gland and a second pressing area corresponding to the opening end of the meibomian gland, and the initial distance between the first pressing area and the eyelid is smaller than that between the second pressing area and the eyelid; based on this, the first pressing area firstly abuts the blind end area of the meibomian gland and limits the eyelid on the eyelid cup in the operation process of the device, so that the eyelid is prevented from retracting and slipping off in the subsequent pressing, and then the second pressing area gradually abuts the opening area.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a meibomian gland pressing device. Background Technology

[0002] Meibomian gland dysfunction (MGD) is a significant cause of evaporative dry eye. Meibomian glands secrete lipids to form the lipid layer of the tear film, reducing tear evaporation and maintaining tear film stability. When the meibomian glands become blocked, their secretory function is abnormal, or the physicochemical properties of the meibomian fat change, tear film stability may decrease, leading to dry eyes, foreign body sensation, and eye irritation. In severe cases, it can further damage the ocular surface. Currently, routine physical therapy for MGD mainly includes warm compresses for softening and mechanical compression. These methods increase the local temperature of the eyelid to reduce the viscosity of the meibomian fat, and combined with external mechanical pressure, promote the drainage of abnormal meibomian fat from the meibomian gland openings, thereby improving the meibomian gland blockage.

[0003] However, existing meibomian gland compression and unblocking techniques still have certain limitations. For example, some treatment methods rely on manual operation by medical staff, such as using instruments like meibomian gland massage forceps, cotton swabs, and glass rods to mechanically squeeze the eyelids. Because the operation is highly dependent on the operator's experience, the magnitude, direction, and duration of applied pressure are difficult to standardize and control. Inappropriate force application may increase patient pain or even cause discomfort or damage to the eyelid tissue. Furthermore, some existing meibomian gland compression devices typically use a planar compression structure, where the pressure is mainly applied to the eyelid tissue in a localized vertical direction. This makes it difficult to fully adapt to the anatomical direction of the meibomian glands, which extend from the blind end to the opening end, resulting in incomplete drainage of meibomian gland fat. Moreover, because the soft tissues around the lower eyelid have a certain degree of mobility, when pressure is applied to the lower eyelid, the tissue may shift, slip, or retract due to the force, preventing some of the pressure from being effectively transmitted to the meibomian gland area of ​​the lower eyelid, thus affecting the treatment outcome.

[0004] Therefore, there is an urgent need for a meibomian gland compression device that can conform to the anatomical structure of the meibomian gland, achieve progressive pressure, and improve the stability and safety of the compression process, so as to solve the technical problems existing in the current technology, such as difficulty in controlling the pressure, insufficient patient comfort, and easy slippage of the lower eyelid. Summary of the Invention

[0005] This application provides a meibomian gland compression device, including a flexible capsule, a housing, and an eyelid cup.

[0006] Preferably, the flexible capsule includes a first flexible capsule and a second flexible capsule for contact with the eyelid.

[0007] Preferably, the shell is used to provide a support structure for the flexible capsule.

[0008] Preferably, the eyelid cup is connected to the housing to support the eyelid and isolate and protect the eyeball.

[0009] Preferably, both the first flexible capsule and the second flexible capsule include a pressing portion.

[0010] Furthermore, the surface of the pressing part is formed as an inclined surface structure, so that during the operation of the meibomian gland pressing device, the pressing part can sequentially abut against the eyelid along the direction from the blind end of the meibomian gland to the opening, so as to achieve progressive pressing of the meibomian gland.

[0011] Furthermore, both the first and second flexible capsules include a pressing portion, which includes a first pressing area and a second pressing area. The first pressing area corresponds to the blind end region of the meibomian gland, and the second pressing area corresponds to the meibomian gland opening region. The initial distance between the first pressing area and the corresponding eyelid surface is smaller than the initial distance between the second pressing area and the corresponding eyelid surface, so that when the meibomian gland pressing device presses the eyelid, the first pressing area first abuts against and presses the area of ​​the eyelid corresponding to the blind end of the meibomian gland, thereby confining the eyelid on the eyelid cup to prevent the eyelid from retracting and slipping due to unstable fixation during subsequent pressing. Then, the second pressing area gradually abuts against and presses the area of ​​the eyelid corresponding to the meibomian gland opening.

[0012] Preferably, the housing includes an upper housing and a lower housing, the upper housing being disposed corresponding to the upper eyelid and the lower housing being disposed corresponding to the lower eyelid.

[0013] Preferably, the housing further includes a first gas delivery pipe and a second gas delivery pipe; wherein the first gas delivery pipe is disposed in the upper housing and the second gas delivery pipe is disposed in the lower housing.

[0014] Preferably, the first flexible bladder is in sealed communication with the first gas delivery pipe and covers the upper shell; the second flexible bladder is in sealed communication with the second gas delivery pipe and covers the lower shell.

[0015] Furthermore, the first flexible capsule and the second flexible capsule also include a fixing part, which is sealed to the shell.

[0016] Furthermore, the first flexible capsule and the second flexible capsule also include an air inlet, which is correspondingly disposed at the end of the gas delivery pipe and is used for the gas delivery pipe to be sealed and inserted, thereby realizing the communication between the gas delivery pipe and the interior of the flexible capsule.

[0017] Preferably, when the pressing part is applied pressure, its opposite ends converge inward to apply opposing squeezing forces to the eyelid.

[0018] Preferably, the meibomian gland pressing device further includes a heating component for heating the eyelid to soften the lipids within the meibomian gland.

[0019] Preferably, the meibomian gland pressing device further includes a pneumatic control unit and a gas connection line, the gas connection line being connected to the gas delivery pipe. When the meibomian gland pressing device is in operation, the pneumatic control unit controls the airflow to the first flexible sac and the second flexible sac respectively via the gas connection line, thereby achieving pressure application of the flexible sacs to the eyelids. Attached Figure Description

[0020] Figure 1 This application provides a schematic diagram of the overall structure of the meibomian gland pressing device.

[0021] Figure 2 This is a schematic diagram showing the meibomian gland pressing device provided in this application when worn around the eye.

[0022] Figure 3 This is a schematic diagram of the lateral anatomy of the human eyelid region.

[0023] Figure 4 This is a schematic diagram showing the initial distance relationship between the flexible capsule and the lower eyelid in an embodiment of this application.

[0024] Explanation of icon numbers

[0025] 1. Shell

[0026] 101 Upper Shell

[0027] 102 Lower Housing

[0028] 103 First Gas Delivery Pipe

[0029] 104 Second Gas Delivery Pipe

[0030] 2 flexible airbags

[0031] 201 First Flexible Capsule

[0032] 202 Second flexible capsule

[0033] 203 Fixing Part

[0034] 204 Pressing Part

[0035] 205 air intake

[0036] 206 First Pressing Zone

[0037] 207 Second Pressing Zone

[0038] 3 eyelid cups

[0039] 4 eyelids

[0040] 401 Upper eyelid

[0041] 402 Lower eyelid

[0042] 5 eyeballs

[0043] 6 meibomian glands

[0044] 601 Meibomian gland opening area

[0045] 602 Meibomian gland blind end region Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. It should be noted that those skilled in the art should understand that the specific embodiments described below are only for explaining this application and are not intended to limit the scope of protection of this application. In the description of this application, unless otherwise expressly specified and limited, the terms "connection," "linked," and "set" 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.

[0047] In the context of patent law and technology disclosure, the terms "first" and "second" used in this application are only used to distinguish different structural components or functional units and do not represent any specific time sequence, spatial order or importance level.

[0048] This application provides a meibomian gland compression device. This device applies controllable and precise mechanical force to the eyelids to effectively compress and unblock the meibomian glands, safely and efficiently draining abnormal secretions (such as accumulated meibomian fat and keratinized plugs). This device can be used to treat ocular surface diseases such as dry eye and meibomian gland dysfunction (MGD), and helps restore ocular surface homeostasis and improve patients' clinical symptoms and signs.

[0049] like Figure 1 As shown, the meibomian gland pressing device includes a flexible sac, a shell, and an eyelid cup.

[0050] The flexible capsule refers to a closed or semi-closed cavity structure with deformability, expandability, extensibility, and / or flexibility, used to transmit pressure to the eyelid tissue under external driving force. The materials of the flexible capsule include, but are not limited to, polymer elastomers, medical-grade silicone, thermoplastic polyurethane (TPU), polyvinyl chloride (PVC), natural latex, synthetic rubber, fluororubber, and multilayer fabric structures or composite membrane structures formed by combining any one or more of the above materials. It should be understood that those skilled in the art can select materials according to actual application needs; any material that meets the requirements of medical biocompatibility, mechanical performance, and durability should fall within the scope of protection of this application. Furthermore, to balance the pressure resistance, structural stability, and adaptability to eyelid tissue deformation of the flexible capsule, the wall thickness of the flexible capsule can be set to 0.05 mm to 5.0 mm, preferably 0.1 mm to 1.5 mm, and more preferably 0.2 mm to 1.0 mm. Within the aforementioned range, the flexible capsule can withstand the internal pressure generated during treatment without rupture or permanent deformation, and can also form a good fit when in contact with the eyelid, thereby improving the uniformity and comfort of the pressure treatment.

[0051] The shell serves to provide a rigid or semi-rigid support structure for the flexible cyst, and to bear, fix, limit, and protect the flexible cyst and other functional components, thereby ensuring the structural stability and force application accuracy of the meibomian gland pressing device during treatment. Those skilled in the art should understand that any skeletal structure capable of achieving the above-mentioned functions of bearing, supporting, limiting, fixing, or protecting should fall within the scope of protection of this application. In some embodiments, the material of the shell includes, but is not limited to, acrylonitrile-butadiene-styrene copolymer (ABS), polycarbonate (PC), polypropylene (PP), polyamide (PA), aluminum alloy, stainless steel, titanium alloy, and medical-grade polyetheretherketone (PEEK), or a composite structure composed of any one or more of the above materials. Those skilled in the art can also select other materials with sufficient mechanical strength and processing performance according to actual application requirements, all of which fall within the scope of protection of this application. Furthermore, the hardness and stiffness of the shell are configured to be greater than that of the flexible cyst, so that it can maintain a predetermined structural shape during the operation of the meibomian gland pressing device. Preferably, the housing does not undergo significant deformation affecting the treatment direction, pressure position, or pressure trajectory under normal operating load, thereby providing stable reaction support for the flexible cyst and ensuring that the pressure is transmitted to the eyelid tissue in the predetermined direction, improving the accuracy, repeatability, and therapeutic effect of meibomian gland compression therapy. In some embodiments, the housing may be designed as a one-piece structure, a modular structure, a frame structure, a ring structure, a plate structure, or other structural forms that can achieve the above functions. Its specific shape and size can be adjusted according to the eyelid anatomy, the layout of the flexible cyst, and the treatment requirements, without constituting a limitation on the scope of protection of this application.

[0052] In this embodiment, the housing constitutes the mechanical support foundation and mounting base of the entire meibomian gland pressing device. Considering the differences in anatomical structure and physiological curvature between the upper and lower eyelids, the housing adopts a split functional design, including an upper housing and a lower housing (combined with...). Figure 2(As shown). The upper shell is positioned corresponding to the upper eyelid, and its overall geometry is configured as an arc-shaped structure adapted to the physiological curvature of the upper eyelid. The radius of curvature of the upper shell can be set to 10 mm to 40 mm, preferably 15 mm to 28 mm. Through this curvature design, the upper shell can form a good fit with the upper eyelid, thereby improving the uniformity and stability of pressure transmission. The lower shell is positioned corresponding to the lower eyelid, and its overall geometry is also configured as an arc-shaped structure adapted to the physiological curvature of the lower eyelid. The radius of curvature of the lower shell can be set to 10 mm to 40 mm, preferably 12 mm to 25 mm. Through this structural design, the lower shell can better fit the lower eyelid tissue, ensuring patient comfort while improving the accuracy and effectiveness of pressure therapy. It should be understood that the above radius of curvature range is only an exemplary embodiment. Those skilled in the art can adjust the curvature parameters according to the eyelid anatomy characteristics, treatment sites, and clinical needs of different populations without departing from the scope of protection of this application.

[0053] The housing also integrates a gas delivery pipeline system, including a first gas delivery pipe and a second gas delivery pipe (combined with...). Figure 2 As shown in the diagram, the gas delivery tube is used to deliver gas into the flexible capsule. The first gas delivery tube is disposed in the upper shell and is used to deliver gas into the first flexible capsule. The first gas delivery tube can be arranged by means of transverse arrangement, embedded arrangement, or attachment to the surface of the upper shell. The inner diameter of the first gas delivery tube can be set to 0.1 mm to 20.0 mm, preferably 0.5 mm to 2.0 mm. In some embodiments, the first gas delivery tube can adopt an integrated flow channel structure integrally formed with the upper shell; in other embodiments, it can also adopt a separately manufactured metal tube, rigid plastic tube, or other fluid delivery component, and be fixed in the upper shell by means of embedding, bonding, snap-fitting, or injection molding.

[0054] The second gas delivery tube is disposed in the lower housing and is used to deliver gas to the second flexible capsule. The inner diameter range, spatial arrangement, connection method, and material selection of the second gas delivery tube may be the same as or different from the first gas delivery tube, and can be adjusted according to actual treatment needs. In some embodiments, the first gas delivery tube and the second gas delivery tube constitute independent gas delivery pathways, which are physically isolated from each other and not interconnected. With this structural design, the external control host can independently control the first and second flexible capsules, thereby realizing synchronous, asynchronous, alternating, or decoupled gas pressure regulation modes to meet the control requirements of different treatment plans for the upper and lower eyelid pressing process.

[0055] The flexible capsule is designed to contact the eyelid and serves as a dynamic unit for directly performing meibomian gland compression. It comprises a first flexible capsule and a second flexible capsule (combined with...). Figure 2 As shown), the first flexible bladder is sealed and connected to the first gas delivery pipe and covers the upper shell; the second flexible bladder is sealed and connected to the second gas delivery pipe and covers the lower shell.

[0056] Both the first flexible capsule and the second flexible capsule include a pressing part for applying pressure to the eyelid (combined with...) Figure 2 (As shown). In some embodiments, the surface of the pressing part is formed as an inclined surface structure, such that during operation of the meibomian gland pressing device, the pressing part can move along the blind end of the meibomian gland (in conjunction with...). Figure 3 (as shown) to the meibomian gland opening (combined) Figure 3 The pressure point (as shown) is sequentially applied to the eyelid in a direction that gradually presses against the meibomian glands. The meibomian gland blind end is the end furthest from the eyelid margin and closer to the deep part of the eye socket; the meibomian gland opening end is the eyelid margin, where secretions are discharged. This structural design improves the efficiency of meibomian gland fat drainage. In some embodiments, the pressure point includes a first pressure area and a second pressure area. The first pressure area corresponds to the meibomian gland blind end region (in conjunction with...). Figure 4 As shown), the second pressing area corresponds to the meibomian gland opening area (in combination with...). Figure 4 (As shown in the diagram). The initial distance between the first pressing area and the corresponding eyelid surface is smaller than the initial distance between the second pressing area and the corresponding eyelid surface. Therefore, when pressure is applied to the eyelid, the first pressing area first contacts and applies pressure to the region of the eyelid corresponding to the blind end of the meibomian gland, preferentially holding and stably confining the eyelid tissue to the eyelid cup, thereby reducing the possibility of eyelid retraction, slippage, or positional displacement during subsequent pressing. Subsequently, as the second pressing area gradually contacts and applies pressure to the region of the eyelid corresponding to the meibomian gland opening, the pressure is gradually transmitted along the extension direction of the meibomian gland, achieving pressure from the blind end of the meibomian gland towards the meibomian gland opening. This structural design helps improve the stability of the pressing process and the therapeutic effect.

[0057] When the pressing part is in operation, its two opposite ends converge inward to apply opposing squeezing forces to the eyelid.

[0058] Both the first and second flexible capsules include a fixing portion (combined) Figure 2As shown in the figure, it is used to achieve a long-term stable sealing connection. In this embodiment, the fixing part can be formed as a circumferential flange structure, a sealing skirt structure, or other structural forms that can achieve a reliable sealing connection surrounding the shell. The fixing part forms a mechanically locked and fluid-sealed connection with the upper and lower shells by mechanical pressure strip fastening, hot melt adhesive bonding, UV adhesive bonding, two-color injection molding, or other connection methods. Preferably, the connection structure between the fixing part and the shell has sufficient sealing strength and connection reliability, so that the flexible bladder can still maintain a stable sealing state when subjected to internal pressure. In some embodiments, when the internal pressure of the flexible bladder reaches 200 kPa or higher, the connection part can still maintain essentially no detectable leakage or meet the preset sealing performance requirements. It should be understood that the above pressure parameters are only exemplary embodiments and do not constitute a limitation on the scope of protection of this application.

[0059] To achieve efficient gas delivery, both the first and second flexible capsules are equipped with air inlets (in conjunction with...). Figure 2 (As shown). The air inlet is correspondingly located at the end of the gas delivery pipe and is used for the sealed insertion of the gas delivery pipe, thereby achieving communication between the gas delivery pipe and the interior of the flexible capsule.

[0060] The meibomian gland pressing device also includes an eyelid cup. The eyelid cup is connected to the housing and serves to support the eyelid tissue and isolate and protect the eyeball. It is an important safety protection structure to prevent pressure from directly acting on the eyeball during treatment. Those skilled in the art should understand that any component that can conform to the anatomical structure of the eye and at least partially extend into the conjunctival sac region between the eyelid and the eyeball to achieve the functions of eyelid support and eyeball isolation and protection should be considered as an eyelid cup and fall within the protection scope of this application. In some embodiments, the eyelid cup is wholly or partially arc-shaped, spoon-shaped, bowl-shaped, cup-shaped, or other curved surface shapes conforming to the anatomical structure of the eye. Through the above structural design, the eyelid cup can spatially isolate the eyelid tissue from the outer surface of the eyeball, thereby avoiding the direct transmission of mechanical pressure generated during treatment to the cornea or sclera, improving the safety of the treatment process. The eyelid cup and the housing can be connected by a plug-in structure, a snap-fit ​​structure, a threaded fastening structure, a dovetail groove sliding connection structure, or a welding structure. The welding structure includes, but is not limited to, ultrasonic welding, laser welding, or thermofusion welding. To ensure connection stability during long-term use, in some embodiments, the assembly gap between the eyelid cup and the housing can be controlled within the range of 0.00 mm to 0.20 mm, so as to reduce the risk of loosening of the connection and improve the reliability and repeated service life of the overall structure.

[0061] Preferably, the meibomian gland pressing device further includes a heating component for heating the eyelid to soften the lipids within the meibomian gland. Preferably, the meibomian gland pressing device further includes a pressure control unit and a gas connection line, the gas connection line being connected to the gas delivery pipe. When the meibomian gland pressing device is in operation, the pressure control unit controls the airflow to the first flexible sac and the second flexible sac via the gas connection line, thereby achieving pressure application of the flexible sacs to the eyelid.

[0062] Example 1: Progressive pressing part based on inclined surface structure

[0063] In order to achieve directional, progressive pressure along the blind end of the meibomian gland toward the opening end of the meibomian gland, this embodiment has a special geometric design for the pressure part of the first flexible sac and / or the second flexible sac.

[0064] In this embodiment, the movable wall surface of the pressing part that contacts the eyelid forms an inclined surface structure. Specifically, the wall thickness of the pressing part corresponding to the blind end region of the meibomian gland is defined as T1, and the wall thickness corresponding to the opening region of the meibomian gland is defined as T2, where T1 < T2. The wall thickness can vary linearly, stepwise, curvilinearly, or in other non-uniform ways along the direction from the blind end to the opening end.

[0065] In another embodiment, the wall thickness of the pressing part can remain substantially consistent, while an inclined structure is formed by changing the height of the supporting base surface of the shell on the flexible bladder. The reference distance between the blind end supporting surface and the eyelid is defined as D1, and the reference distance between the open end supporting surface and the eyelid is defined as D2, where D1 < D2. Preferably, the inclination angle θ formed between the inclined surface and the longitudinal section of the eyelid is 1° to 90°, more preferably 5° to 60°.

[0066] When the gas delivery system introduces gas into the flexible capsule, the area of ​​the pressing part corresponding to the blind end of the meibomian gland preferentially contacts the eyelid and applies pressure. Subsequently, the contact area gradually expands along the length of the meibomian gland towards the opening, eventually extending to the meibomian gland opening area. Therefore, the pressing part can form a pressing process that gradually advances from the blind end of the meibomian gland towards the meibomian gland opening, thereby promoting the movement and discharge of secretions from the meibomian gland along the gland's discharge direction. Compared to a synchronous pressing method, this structure is beneficial for improving the efficiency of meibomian gland discharge.

[0067] Example 2: Anchored Pressing Part Based on Initial Spacing Difference

[0068] To address the issue that the lower eyelid tissue is soft and prone to displacement under pressure, this embodiment proposes a pressing part structure with tissue limiting function.

[0069] In this embodiment, the pressing portion of the first flexible capsule and / or the second flexible capsule includes a first pressing area and a second pressing area. The first pressing area corresponds to the blind end region of the meibomian gland, and the second pressing area corresponds to the meibomian gland opening region. When the device is in its initial state, the shortest distance between the first pressing area and the corresponding eyelid surface is defined as L1, and the shortest distance between the second pressing area and the corresponding eyelid surface is defined as L2, where L1 < L2.

[0070] Preferably:

[0071] L1 is 0 mm to 3.0 mm, preferably 0.2 mm to 1.0 mm;

[0072] L2 is 1.0 mm to 10.0 mm, preferably 2.0 mm to 5.0 mm;

[0073] ΔL = L2−L1 is 0.5 mm to 8.0 mm, preferably 1.5 mm to 4.0 mm;

[0074] When the flexible sac expands, due to the small initial distance between the first pressure area and the eyelid, the first pressure area preferentially contacts the region of the eyelid corresponding to the blind end of the meibomian gland, pressing this region against the eyelid cup, thereby limiting the eyelid tissue. Subsequently, as the flexible sac further expands, the second pressure area gradually contacts the region of the eyelid corresponding to the meibomian gland opening and applies pressure. Because the eyelid tissue is synergistically limited by the first pressure area and the eyelid cup, the occurrence of eyelid retraction, slippage, or positional displacement during pressure is reduced. With the above structural design, the pressure can be transmitted more effectively along the length of the meibomian gland, thereby promoting the movement and drainage of the meibomian gland contents towards the opening, improving the stability and consistency of the treatment process.

[0075] It should be understood that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit the scope of protection of this application. Various modifications, substitutions, combinations or equivalent improvements made by those skilled in the art to the above embodiments without departing from the spirit and substance of this application should fall within the scope of protection of this application.

Claims

1. A meibomian gland compression device, comprising: A flexible capsule, comprising a first flexible capsule and a second flexible capsule, is used for contact with the eyelid; The shell serves as a support structure for the flexible capsule; An eyelid cup, connected to the housing, is used to support the eyelid and isolate and protect the eyeball; Both the first flexible capsule and the second flexible capsule include a pressing part, the surface of which is formed as an inclined surface structure, so that during the operation of the meibomian gland pressing device, the pressing part can sequentially abut against the eyelid along the direction from the blind end of the meibomian gland to the opening, so as to achieve progressive pressing of the meibomian gland.

2. A meibomian gland compression device, comprising: A flexible capsule, comprising a first flexible capsule and a second flexible capsule, is used for contact with the eyelid; The shell serves as a support structure for the flexible capsule; An eyelid cup, connected to the housing, is used to support the eyelid and isolate and protect the eyeball; Both the first flexible capsule and the second flexible capsule include a pressing part, and the pressing part includes a first pressing area and a second pressing area; the first pressing area corresponds to the blind end region of the meibomian gland, and the second pressing area corresponds to the opening region of the meibomian gland; The initial distance between the first pressing area and the corresponding eyelid surface is smaller than the initial distance between the second pressing area and the corresponding eyelid surface, so that when the meibomian gland pressing device presses the eyelid, the first pressing area first abuts against and presses the area of ​​the eyelid corresponding to the blind end of the meibomian gland, thereby confining the eyelid on the eyelid cup to prevent the eyelid from retracting and slipping due to unstable fixation during subsequent pressing. Then, the second pressing area gradually abuts against and presses the area of ​​the eyelid corresponding to the meibomian gland opening.

3. The meibomian gland pressing device according to claim 1 or 2, wherein the housing comprises an upper housing and a lower housing, the upper housing being disposed corresponding to the upper eyelid and the lower housing being disposed corresponding to the lower eyelid.

4. The meibomian gland pressing device according to claim 3, wherein the housing further includes a first gas delivery pipe and a second gas delivery pipe; wherein, The first gas delivery pipe is disposed in the upper housing, and the second gas delivery pipe is disposed in the lower housing.

5. The meibomian gland pressing device according to claim 4, wherein the first flexible sac is in sealed communication with the first gas delivery pipe and covers the upper housing; the second flexible sac is in sealed communication with the second gas delivery pipe and covers the lower housing.

6. The meibomian gland pressing device according to claim 5, wherein the first flexible sac and the second flexible sac further include a fixing part and an air inlet. Wherein, The fixing part is sealed to the shell; the air inlet is correspondingly provided at the end of the gas delivery pipe and is used for the gas delivery pipe to be sealed and inserted, thereby realizing the communication between the gas delivery pipe and the interior of the flexible bladder.

7. The meibomian gland pressing device according to claim 1 or 2, wherein when the pressing part applies pressure, its opposite ends converge inward to apply opposing squeezing action to the eyelid.

8. The meibomian gland pressing device according to claim 1 or 2, wherein the meibomian gland pressing device further comprises a heating component for heating the eyelid to soften the lipids within the meibomian gland.

9. The meibomian gland pressing device according to claim 4 further includes a pneumatic control unit and a gas connection line, wherein the gas connection line is connected to the gas delivery pipe. When the meibomian gland pressing device is in operation, the pneumatic control unit controls the air passages to the first flexible sac and the second flexible sac respectively through the gas connection line, so as to realize the pressing of the flexible sacs on the eyelids.

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