Convenient-to-adjust examining table for ophthalmology department

Abstract

The invention discloses a convenient-to-adjust examining table for ophthalmology department in the technical field of ophthalmology department examination. The convenient-to-adjust examining table comprises a fixed seat, a horizontal driving assembly and a vertical driving assembly, extrusion cavities are symmetrically formed in the fixed seat; one end of the connecting rod is fixedly connected with an extrusion block; an air conveying channel is formed in one side of each extrusion cavity; a vision tester body is mounted at the top end of the fixing seat, and lenses are symmetrically embedded in one side, close to the supporting seat, of the vision tester body; the visual acuity tester further comprises annular air guide grooves symmetrically formed in the visual acuity tester body, a plurality of air guide outlets are formed in the inner top walls of the annular air guide grooves, and drainage channels arranged in the visual acuity tester body are formed in the inner bottoms of the annular air guide grooves. Through linkage adjustment of the horizontal driving assembly and the vertical driving assembly, the extrusion block is driven to compress air in the closed cavity, air flow is forced to enter the annular air guide groove through the air conveying channel, evenly-distributed isolation air curtains are formed along the outer edge of the lens, damp and hot air flow exhaled by a patient is guided to the two sides, and the mirror face is prevented from making contact with condensed water mist.

Description

Technical Field

[0001] The invention relates to the technical field of ophthalmological examination, in particular to an easily adjustable examination table for ophthalmology. Background Art

[0002] During ophthalmic diagnosis and treatment, the adaptability of the patient's body position directly affects the efficiency of the examination and the accuracy of the results. However, existing examination tables generally have the problems of fixed structure and single adjustment dimension. For example, traditional examination tables cannot be personalized according to the patient's height and body shape, making it difficult for children or people with limited mobility to maintain a standard examination posture. At the same time, the height and angle adjustment of the equipment rely on manual operation, which not only increases the operating burden of medical staff, but may also affect the use of precision instruments such as ophthalmoscopes and slit lamps due to insufficient adjustment accuracy. In addition, as ophthalmic diagnosis and treatment technology develops towards precision and intelligence, traditional examination tables are difficult to be compatible with new examination equipment or meet dynamic monitoring needs, further highlighting the necessity of adjustable examination tables in improving diagnosis and treatment quality and patient experience.

[0003] A search revealed a patent application, publication number CN108478182B, which discloses an easily adjustable examination table for ophthalmology. The table comprises a base, a T-shaped slider, a first support tube, a first lifting rod, a first positioning screw, a first seat plate, a support column, and a large workbench. A first T-shaped slot is defined on the left side of the top of the base, into which the slider slides. This slider / slot and lifting rod structure allow for quick and easy adjustment of the examination table to individual needs.

[0004] While adjustable examination tables address patient positioning issues through structural optimization, they still face secondary interference caused by environmental and human factors in practical applications. When a patient adopts a standard examination posture, the hot and humid air from their breath easily exchanges heat with the optical instrument lenses. This sudden change in temperature can cause condensation on the lens surfaces, particularly in environments with large temperature differences. This physical phenomenon not only interferes with the doctor's ability to clearly observe the ocular structures but also prolongs the examination time due to repeated lens wiping, reducing diagnostic and treatment efficiency.

[0005] Therefore, the present invention proposes an easily adjustable examination table for ophthalmology to solve the above problems. Summary of the Invention

[0006] To solve the above problems, the present invention provides an easily adjustable examination table for ophthalmology. Through the linkage adjustment of the horizontal and vertical drive components, the extrusion block is driven to compress the air in the closed cavity, forcing the air flow into the annular air guide groove through the air supply channel, forming an evenly distributed isolation air curtain along the outer edge of the lens, guiding the hot and humid air exhaled by the patient to both sides, and preventing the mirror surface from contacting condensed water mist.

[0007] To achieve the above-mentioned object, the technical solution of the present invention is as follows: an easily adjustable examination table for ophthalmology, comprising a base and a support base, a fixing base mounted on the top of the base, an adjustment slot formed on the top of the fixing base, a horizontal drive assembly disposed in the adjustment slot, the horizontal drive assembly being threadedly connected to a vertical drive assembly, the top of the vertical drive assembly being fixedly connected to the bottom of the support base;

[0008] Sliders are symmetrically fixedly connected to both sides of the vertical drive assembly, and slide grooves that slide with the slides are symmetrically opened on both side walls of the adjustment groove. The ends of the slides away from the vertical assembly are fixedly connected to connecting rods; extrusion cavities corresponding to the slide grooves are symmetrically opened in the fixed seat, and the ends of the connecting rods away from the slides extend into the extrusion cavities and are fixedly connected to extrusion blocks that slide with the extrusion cavities; and gas transmission channels are opened on the sides of the extrusion cavities away from the extrusion blocks.

[0009] The vision tester body is installed on the top of the fixed seat, and the vision tester body is symmetrically embedded with a lens on one side close to the support seat; it also includes annular air guide grooves symmetrically opened on the vision tester body, and the annular air guide grooves are respectively arranged along the outer edges of the lenses. The top walls of the annular air guide grooves are each provided with a number of air guide outlets, and the air guide outlets are all connected to the air supply channel. The bottom of the annular air guide grooves is provided with a drainage channel arranged inside the vision tester body; the extrusion cavity is provided with a balancing component for balancing the air pressure inside the extrusion cavity.

[0010] Principle of the basic solution: When the doctor adjusts the examination table, the horizontal drive assembly drives the vertical drive assembly to move horizontally, while simultaneously raising and lowering the support base through threaded transmission. The sliders on both sides of the vertical drive assembly slide along the slide groove, pushing the connecting rod and extrusion block to reciprocate within the extrusion chamber. The extrusion block then compresses the air within the extrusion chamber, forcing the airflow through the air supply channel into the annular air guide groove. The airflow is evenly ejected from the air guide outlet at the top of the air guide groove, forming an isolation air curtain surrounding the lens, directing the patient's exhaled moisture toward the outside of the lens (such as the cheek). The balance assembly draws in external air when the extrusion block retracts, avoiding the formation of negative pressure in the chamber and ensuring airflow continuity. The drainage channel discharges residual moisture to prevent it from flowing back into the lens area.

[0011] The above solution has the following beneficial effects: 1. Compared with the existing technology, this solution deeply integrates the mechanical adjustment system with the airflow protection function to achieve intelligent coordination of equipment position adjustment and mirror protection. When the doctor adjusts the support seat through the horizontal or vertical drive assembly, the linkage of the slider and the connecting rod will synchronously drive the extrusion block to compress the air in the cavity, directly converting the mechanical motion energy into airflow power. This self-powered design does not require an external air pump or electric drive, and can automatically generate a ring-shaped isolation air curtain around the lens during the process of adjusting the height of the examination table. The airflow forms an outward-diffusion barrier through the air guide outlet at a special angle, which effectively blocks the hot and humid airflow exhaled by the patient from contacting the lens, and avoids the physical obstruction of the inspection field of view by traditional protective devices. Compared with solutions that rely on electric defogger or manual wiping, this linkage mechanism significantly improves the smoothness of operation and the timeliness of protection.

[0012] 2. This solution integrates air pressure balance and airflow path design to create a continuous and stable dynamic protection system. During the reciprocating motion of the extrusion block, the balancing component intelligently adjusts the cavity air pressure to ensure continuous and stable air curtain output, overcoming the intermittent airflow issues often associated with traditional air pressure systems. The drainage channel and air outlet form a bidirectional airflow circulation, creating an active diversion field around the lens. This not only quickly directs the isolated hot and humid air toward the outer cheek, but also collects residual moisture through negative pressure adsorption, preventing secondary condensation on the device surface.

[0013] Furthermore, the horizontal drive assembly includes a drive motor arranged inside the fixed seat, and the drive motor output shaft is coaxially fixedly connected to a threaded rod, which extends away from one end of the drive motor into the adjustment slot and rotates with the fixed seat.

[0014] Beneficial effects: The horizontal drive assembly adopts an integrated design of built-in motor and threaded rod to achieve precise horizontal displacement control in a limited space. The rotational coordination structure of the threaded rod and the adjustment slot not only ensures transmission stability, but also eliminates the clearance error of traditional gear transmission through direct drive of the drive motor. When the doctor adjusts the examination table, the linear output of the drive motor is directly converted into the smooth movement of the support seat. Its mechanical energy synchronously triggers the extrusion chamber air supply system, forming a closed-loop response mechanism of "adjustment-protection", avoiding the interference of the external drive device on the operation line, and significantly improving the equipment integration and operation coordination.

[0015] Furthermore, the vertical drive assembly includes a lifting seat threadedly connected to the threaded rod, an electric lifting column is installed on the top of the lifting seat, and the top of the electric lifting column is fixedly connected to the bottom of the support seat; the two sides of the lifting seat are respectively fixedly connected to the two sliders.

[0016] Beneficial Effects: The vertical drive assembly, through the composite structure of a lifting base and electrically controlled lifting columns, achieves precise decoupled control of both horizontal and vertical degrees of freedom. The rigid coordination of the lifting base and threaded rod ensures stable horizontal movement, while the independent drive of the electrically controlled lifting columns enables rapid height adjustment. Together, these two elements enable smoother patient positioning. The rigid connection between the slider and the lifting base simultaneously transmits mechanical power, precisely triggering the extrusion chamber's air supply during horizontal movement. This creates a dynamic matching mechanism between height and air curtain strength, preventing interruptions in protective performance due to adjustments and significantly improving operational consistency in complex examination scenarios.

[0017] Furthermore, the balancing components all include ventilation holes opened on the inner wall of the extrusion chamber, and a first one-way valve is installed inside the ventilation holes.

[0018] Beneficial effect: The ventilation hole and the first one-way valve form an adaptive air pressure compensation structure, which automatically inhales external air to supplement the volume change of the cavity when the extrusion block is reset, eliminating the negative pressure hysteresis effect.

[0019] Furthermore, a second one-way valve is provided inside the gas transmission channel.

[0020] Beneficial Effect: The second one-way valve forms a directional airflow lock structure, forcing airflow to flow unidirectionally to the annular air guide groove, preventing reverse leakage when the extrusion block resets. This maintains constant air curtain injection pressure during air pressure fluctuations, ensuring the rigid boundary of the isolation air curtain remains stable.

[0021] Furthermore, the side of the vision tester body close to the support seat is configured as an arc-shaped surface.

[0022] Beneficial effect: The arc-shaped surface configuration guides the hot and humid airflow exhaled by the patient to be naturally diverted along the tangential direction through the streamlined surface.

[0023] Furthermore, the support seat is an arc-shaped structure.

[0024] Beneficial effects: The arc-shaped structure of the support seat is optimized with bionic curved surface according to the anatomical characteristics of the mandible, forming a three-point limited support through the double-curvature concave surface and the mental tuberosity-mandibular ramus bony landmark, while reducing the discomfort of examination for patients with tense temporomandibular joints.

[0025] Furthermore, a plurality of through holes are provided on the surface of the support seat.

[0026] Beneficial effect: The through-hole design increases the air permeability of the support seat.

[0027] Furthermore, the diameter of one end of the air guide outlet close to the annular air guide groove is smaller than the diameter of the other end.

[0028] Beneficial Effects: The gradually expanding diameter design of the air outlet regulates airflow pattern through the Venturi effect. The cross-sectional area of the inlet section shrinks, accelerating the airflow to form a high-speed jet, while the cross-sectional area of the outlet section expands, allowing the airflow diffusion angle to be controllably increased. This structure creates an outward-sloping laminar barrier at the outer edge of the lens, enhancing the airflow's shear efficiency against hot, humid air while also reducing airflow noise through the diffuser section. The gradually expanding configuration simultaneously balances air pressure fluctuations, allowing the air curtain edge to smoothly align with the natural contours of the patient's face, avoiding the vortexes generated by traditional uniform-diameter air holes that can interfere with vision and enhance uniformity of protection.

[0029] Furthermore, a plurality of fixing nuts are threadedly connected on both sides of the base in the width direction.

[0030] Benefits: Threaded nuts on both sides of the base provide a standardized quick-install interface, enabling tool-free assembly by matching table edge clamps of varying sizes. Medical staff simply rotate the nuts to secure the examination table to the pre-set holes or clamps on the table edge, adapting to diverse deployment scenarios, including in-clinics and mobile examination carts.

[0031] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is an overall isometric view of an embodiment of an easily adjustable examination table for ophthalmology according to the present invention;

[0033] Figure 2 An axonometric view of a moving assembly of an embodiment of an easily adjustable examination table for ophthalmology according to the present invention;

[0034] Figure 3 A side sectional view of a movable base of an embodiment of an easily adjustable examination table for ophthalmology according to the present invention;

[0035] Figure 4 A side view of a detection assembly and a schematic diagram of the internal channel structure of an embodiment of an easily adjustable inspection table for ophthalmology according to the present invention;

[0036] Figure 5 This is a front sectional view of part A of an embodiment of the easily adjustable examination table for ophthalmology according to the present invention.

[0037] The figure marks in the drawings of the specification include: 1. base; 2. fixing seat; 3. vision tester body; 4. lens; 5. annular air guide groove; 6. support seat; 7. electric lifting column; 8. lifting seat; 9. fixing nut; 10. driving motor; 11. slider; 12. threaded rod; 13. connecting rod; 14. extrusion block; 15. slide groove; 16. extrusion chamber; 17. ventilation hole; 18. gas transmission channel; 19. drainage channel; 20. air guide outlet. DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0041] The following is further described in detail through specific implementation methods:

[0042] Example 1:

[0043] As attached Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 The figure shows an easily adjustable ophthalmic examination table, comprising a base 1, a support base 6, and a control panel. The support base 6 is an arc-shaped structure with several through-holes on its surface to improve the comfort of the patient's mandibular support. A fixed base 2 is integrally formed at the top of the base 1. The top of the fixed base 2 has an adjustment slot, within which a horizontal drive assembly is located. The horizontal drive assembly is threadedly connected to a vertical drive assembly, and the top of the vertical drive assembly is fixedly connected to the bottom of the support base 6.

[0044] Slide blocks 11 are symmetrically formed on both sides of the vertical drive assembly. Slide blocks 15 that slide with the slide blocks 11 are symmetrically opened on both sides of the adjustment groove wall. Connecting rods 13 are welded to the ends of the slide blocks 11 away from the vertical assembly. Extrusion cavities 16 corresponding to the slide blocks 15 are symmetrically opened in the fixed seat 2. The ends of the connecting rods 13 away from the slide blocks 11 extend into the extrusion cavities 16 and are welded to extrusion blocks 14 that slide with the extrusion cavities 16. A gas transmission channel 18 is opened on the side of the extrusion cavities 16 away from the extrusion blocks 14.

[0045] The visual acuity tester body 3 is mounted on the top of the mounting base 2. The side of the visual acuity tester body 3 near the support base 6 is configured as an arcuate surface, and a lens 4 is symmetrically embedded in the side of the visual acuity tester body 3 near the support base 6. The visual acuity tester body 3 also includes symmetrical annular air guide grooves 5, which are arranged along the outer edges of the lens 4. The top walls of the annular air guide grooves 5 are each provided with a plurality of air guide outlets 20, each of which is connected to the air supply channel 18. The bottoms of the annular air guide grooves 5 are each provided with a drainage channel 19 disposed within the visual acuity tester body 3. A balancing assembly for balancing the air pressure within the extrusion chamber 16 is provided within the extrusion chamber 16. The balancing assembly includes a ventilation hole 17 formed on the inner wall of the extrusion chamber 16, and a first one-way valve is bonded to the interior of each ventilation hole 17. A second one-way valve is provided within the air supply channel 18.

[0046] The horizontal drive assembly includes a drive motor 10 arranged inside the fixed base 2. The output shaft of the drive motor 10 is coaxially fixedly connected with a threaded rod 12. The threaded rod 12 extends away from one end of the drive motor 10 into the adjustment slot and rotates with the fixed base 2. The drive motor 10 is electrically connected to the control panel.

[0047] The vertical drive assembly includes a lifting seat 8 threadedly connected to the threaded rod 12. The lifting seat 8 and the threaded rod 12 are connected by a ball screw. The top of the lifting seat 8 is fixedly connected to the lifting seat 8. The top of the lifting seat 8 is installed with an electric lifting column 7. The top of the electric lifting column 7 is fixedly connected to the bottom of the support seat 6; the two sides of the lifting seat 8 are respectively fixedly connected to the two sliders 11.

[0048] The specific implementation process is as follows: When the doctor activates the device for an eye examination, they first activate the drive motor 10 via the control panel. This drives the threaded rod 12 to rotate within the adjustment slot. The threaded drive causes the lifting base 8 to translate axially along the threaded rod 12, simultaneously driving the rigidly connected electrically controlled lifting column 7 to move horizontally as a whole, thereby adjusting the fore-aft position of the support base 6. During this process, the sliders 11 fixed to either side of the lifting base 8 slide along the guide slots 15, pushing the extrusion block 14 back and forth within the extrusion chamber 16 via the connecting rod 13.

[0049] When the support base 6 moves horizontally (the support base 6 and the vision tester body 3 are close to each other, as shown in FIG. Figure 1As shown in FIG1 , the extrusion block 14 is pushed toward the air delivery channel 18, compressing the air in the cavity. At this time, the second one-way valve is opened and the first one-way valve is closed. The pressurized air flows through the air delivery channel 18 and is injected into the annular air guide groove 5 of the vision tester body 3 at high speed through the air guide outlet 20. The air flow is ejected evenly from the air guide outlet 20, forming an outward-slanting laminar air curtain around the periphery of the lens 4, isolating the patient's exhaled hot and humid air from contacting the lens 4, and directing these gases to the bottom of the annular air guide groove 5 and guiding them to the sides below the cheeks through the drainage channel 19, thereby blocking the patient's exhaled air from flowing to the lens 4 during the adjustment of the support seat 6. After the adjustment is completed, the patient's mouth is close to the curved surface of the vision tester body 3, thereby ensuring that the patient's subsequent exhaled air is continuously guided downward along the curved surface, further guiding the direction of the hot and humid air, and preventing the hot and humid air from contacting the lens 4, forming fog on the surface of the lens 4, and interfering with the doctor's judgment and the accuracy of the examination results.

[0050] After the inspection is completed, the reverse drive motor 10 resets the components, that is, the extrusion block 14 slides in the direction. At this time, the second one-way valve is closed and the first one-way valve is opened, allowing outside air to enter the extrusion chamber 16 to balance the air pressure so that a stable air curtain can be formed when the support seat 6 is adjusted.

[0051] Example 2:

[0052] The difference from the above embodiment is that the diameter of the air outlet 20 at one end near the annular air guide groove 5 is smaller than that at the other end. The diameter of the air outlet 20 at the end near the annular air guide groove 5 decreases, and the diameter increases at the end away from the annular air guide groove 5, forming a gradually expanding channel. When the extrusion block 14 compresses the airflow, the airflow at the outlet produces an acceleration effect due to the change in the cross-sectional area of the channel, increasing the ejection speed. After the high-speed airflow is ejected from the gradually converging end, it diffuses into a more uniform laminar flow in the gradually expanding section, covering a wider anti-fog area on the outer edge of the lens 4, while reducing the risk of local airflow turbulence. At the same time, the accelerated airflow is further tilted to blow towards the lower part of the patient's cheek, enhancing the guidance effect on exhaled moisture and reducing the distance sensitivity between the air curtain and the patient's mouth and nose.

[0053] Example 3:

[0054] The difference from the above embodiment is that, Figure 1 As shown, a number of fixing nuts 9 are threadedly connected on both sides of the width direction of the base 1. By rotating the fixing nuts 9, the extension length can be adjusted and directly locked to the edge of the examination table. No additional tools are required during operation. The equipment can be quickly fixed by tightening the fixing nuts 9. When disassembling, the lock can be released by rotating them in the opposite direction. This design is suitable for examination tabletops of different thicknesses or structures, which improves the flexibility of equipment installation. At the same time, it ensures that the table is stable and without displacement during the examination, avoiding discomfort to the patient due to shaking of the equipment. An anti-slip pad can be added to the bottom of the nut to further increase the friction of the contact surface, which is suitable for mobile diagnosis and treatment scenarios.

[0055] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications derived therefrom remain within the scope of protection of the present invention.

Claims

1. An easily adjustable examination table for ophthalmology, comprising a base (1) and a support seat (6), characterized in that: A fixing seat (2) is installed on the top of the base (1), an adjustment slot is opened on the top of the fixing seat (2), a horizontal drive assembly is arranged in the adjustment slot, the horizontal drive assembly is threadedly connected to the vertical drive assembly, and the top of the vertical drive assembly is fixedly connected to the bottom of the support seat (6); The vertical drive assembly is symmetrically fixedly connected with sliders (11) on both sides, and the two side walls of the adjustment groove are symmetrically provided with sliding grooves (15) that are slidably matched with the sliders (11). The sliders (11) are fixedly connected with connecting rods (13) at one end away from the vertical assembly; the fixed seat (2) is symmetrically provided with extrusion cavities (16) that correspond one to one with the sliding grooves (15); the connecting rods (13) are extended into the extrusion cavities (16) at one end away from the sliders (11) and are fixedly connected with extrusion blocks (14) that are slidably matched with the extrusion cavities (16); the extrusion cavities (16) are provided with air delivery channels (18) at one side away from the extrusion blocks (14); The top of the fixing seat (2) is provided with a vision tester body (3), and a lens (4) is symmetrically embedded in the vision tester body (3) near the support seat (6); the vision tester body (3) also includes an annular air guide groove (5) symmetrically opened on the vision tester body (3), the annular air guide groove (5) is respectively arranged along the outer edge of the lens (4), the top wall of the annular air guide groove (5) is provided with a plurality of air guide outlets (20), the air guide outlets (20) are connected to the air delivery channel (18), and the bottom of the annular air guide groove (5) is provided with a drainage channel (19) arranged inside the vision tester body (3); and a balancing component for balancing the internal air pressure of the extrusion cavity (16) is provided in the extrusion cavity (16).

2. The easily adjustable examination table for ophthalmology according to claim 1, characterized in that: The horizontal drive assembly comprises a drive motor (10) arranged inside a fixed seat (2); an output shaft of the drive motor (10) is coaxially fixedly connected to a threaded rod (12); an end of the threaded rod (12) away from the drive motor (10) extends into an adjustment slot and is rotationally engaged with the fixed seat (2).

3. The easily adjustable examination table for ophthalmology according to claim 2, characterized in that: The vertical drive assembly comprises a lifting seat (8) threadedly connected to a threaded rod (12); an electric-controlled lifting column (7) is installed on the top of the lifting seat (8); the top of the electric-controlled lifting column (7) is fixedly connected to the bottom of the support seat (6); and both sides of the lifting seat (8) are fixedly connected to two sliders (11).

4. The easily adjustable examination table for ophthalmology according to claim 3, characterized in that: The balancing components all include an air exchange hole (17) opened on the inner wall of the extrusion cavity (16), and a first one-way valve is installed inside the air exchange hole (17).

5. The easily adjustable examination table for ophthalmology according to claim 4, characterized in that: A second one-way valve is provided inside the gas transmission channel (18).

6. The easily adjustable examination table for ophthalmology according to claim 5, characterized in that: The side of the vision tester body (3) close to the support seat (6) is configured as an arc-shaped surface.

7. The easily adjustable examination table for ophthalmology according to claim 6, characterized in that: The support seat (6) is an arc-shaped structure.

8. The easily adjustable examination table for ophthalmology according to claim 7, characterized in that: The surface of the support seat (6) is provided with a plurality of through holes.

9. The easily adjustable examination table for ophthalmology according to claim 8, characterized in that: The diameter of one end of the air guide outlet (20) close to the annular air guide groove (5) is smaller than the diameter of the other end.

10. The easily adjustable examination table for ophthalmology according to claim 9, characterized in that: A plurality of fixing nuts (9) are threadedly connected on both sides of the base (1) in the width direction.

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