An apparatus for anterior chamber depth measurement prior to refractive surgery

Abstract

This invention discloses an anterior chamber depth measurement device for pre-refractive surgery, comprising a base and a movable seat. A support block is mounted on one end of the upper surface of the base, and a soft pad is mounted on the upper end of the support block. The measuring instrument body is mounted on the middle of the upper end of the movable seat. A fixing structure is provided at the lower end of the base, and an adjustment structure is provided inside the base. A protective structure is provided on the movable seat. The fixing structure includes an L-shaped fixing seat, a rotating block, a bearing, a clamping plate, and a rectangular slider. This invention's anterior chamber depth measurement device for pre-refractive surgery avoids movement of the device during measurement, thus preventing interference with the measurement. It also eliminates the need to simultaneously rotate two handles to drive two screws, preventing screw jamming and protecting the measuring instrument body from damage caused by external impacts when not in use.

Description

Technical Field

[0001] This invention relates to the field of ophthalmic examination equipment technology, and in particular to an anterior chamber depth measurement device for use before refractive surgery. Background Technology

[0002] Preoperative anterior chamber depth measurement devices are instruments that accurately measure the distance from the inner surface of the cornea to the anterior surface of the lens. Common devices include three-dimensional anterior segment analyzers, optical biometers, anterior segment optical coherence tomography (OCT), ultrasound biomicroscopy (UBM), and slit-lamp biomicroscopy. Optical biometers, such as the Zeiss IOL Master series, such as the IOL Master 500, utilize the principle of optical partial coherence interferometry to accurately measure ocular biological parameters such as anterior chamber depth. The IOL Master 700 combines frequency-scanning OCT with optical coherence tomography. This technology not only measures anterior chamber depth but also clarifies a patient's fixation status by observing fundus images, improving measurement accuracy. Multiple parameters can be obtained with a single click. For example, a novel ophthalmic optical biometer (publication number CN216984868U) includes a base, a fixed frame fixed at the intersection of the upper surface and front of the base, a soft pad on the inner bottom wall of the fixed frame, and a first spring fixed on the inner top wall. The bottom end of the first spring is fixed in a connecting hole in a fixed soft plate. The two sides of the fixed soft plate are placed in movable grooves on the sides of the fixed frame. The fixed frame is fixed by the cooperation of the slots on both sides and the locking blocks on the front of the base. When using the measuring instrument, the doctor pinches the two sides of the fixed soft plate, lifts it upwards to compress the first spring, and then has the patient place their head inside the fixed frame with their chin on the soft pad, slowly adjusting the fixed soft plate and the patient... The patient's head is brought into contact with the device, and then both hands are released. The patient's head is then slightly secured using the first spring, a fixed soft plate, and a soft pad. This allows for easy head fixation, reduces adjustment time, and ensures accurate measurement. However, the measuring instrument itself is fixed to the movable base without a protective structure. Impacts from external forces can easily damage the instrument, making convenient protection difficult. Furthermore, adjusting the movable base to move the measuring instrument requires turning two levers, which simultaneously rotates two screws, making it prone to jamming and difficult to adjust. Additionally, the device is fixed to the table edge using a second spring and a fixed clamp. This spring-force-based fixation can easily cause the device to move during anterior chamber depth measurements, affecting the measurement. Summary of the Invention

[0003] The main objective of this invention is to provide an anterior chamber depth measurement device for pre-refractive surgery, which can effectively solve the problems in the background art. To achieve the above objectives, the technical solution adopted by the present invention is as follows: An anterior chamber depth measurement device for refractive surgery includes a base and a movable seat. A support block is installed at one end of the upper surface of the base, and a soft pad is installed on the upper end of the support block. The measuring instrument body is installed in the middle of the upper end of the movable seat. A fixing structure is provided at the lower end of the base. An adjustment structure is provided inside the base. A protective structure is provided on the movable seat. The fixing structure includes an L-shaped fixing seat, a rotating block, a bearing, a clamping plate, a rectangular slider, a threaded rod, a rectangular groove, and a rectangular anti-slip pad. Preferably, L-shaped fixing seats are installed at both the front and rear ends of the lower surface of the base. A rectangular sliding groove is formed on the inner surface of the L-shaped fixing seat. A bearing is installed at the upper and lower ends of the rectangular sliding groove. A threaded rod is installed on the bearing. A rotating block is installed at the lower end of the threaded rod. A rectangular slider is threaded onto the outer surface of the threaded rod. A clamping plate is installed on the inner surface of the rectangular slider. A rectangular anti-slip pad is installed on the upper end of the clamping plate and the inner top surface of the L-shaped fixing seat. Preferably, the adjustment structure includes a servo motor, a first slider, a first groove, a second bearing, a rectangular transmission groove, a circular transmission rod, a second bevel gear, a second threaded rod, a third bearing, and a first bevel gear. The base has a rectangular transmission groove inside, and the second bearing is installed at both the front and rear ends of the rectangular transmission groove. Preferably, a circular transmission rod is installed on the second bearing, a servo motor is fixedly installed on the front surface of the base, the rotating part of the servo motor is connected to the circular transmission rod, a first bevel gear is installed on the outer surface of the circular transmission rod near the front and rear ends, and a first sliding groove is opened on the upper surface of the base near the front and rear ends. Preferably, a No. 3 bearing is installed at both ends of the No. 1 slide groove, a No. 2 threaded rod is installed on the No. 3 bearing, a No. 2 bevel gear is installed at the other end of the No. 2 threaded rod, the No. 2 bevel gear meshes with the No. 1 bevel gear, a No. 1 slider is threaded on the outer surface of the No. 2 threaded rod, and a movable seat is installed at the upper end of the No. 1 slider. Preferably, the protective structure includes a fixed block, a protective cover, a rectangular insert, a rectangular slot, a rectangular groove, a circular slide rod, a circular slide groove, a return spring, a circular slider, a rectangular groove, a rectangular block, a first mounting base, a movable rod, a second mounting base, a rectangular sliding hole, a rectangular insert, a trapezoidal slide groove, and a trapezoidal slider. Preferably, the movable seat has a circular groove inside, a circular slider is slidably installed in the circular groove, a circular slider is installed on the outer surface of the circular slide rod near the rear end, a return spring is sleeved on the front end of the circular slider on the outer surface of the circular slide rod, and a fixing block is installed on the front end of the circular slide rod. Preferably, rectangular slots are provided at both the front and rear ends of the circular slide groove inside the movable seat, and rectangular blocks are installed on the outer surface of the circular slide rod near the front and rear ends. A first mounting seat is installed at both ends of the rectangular block, and a movable rod is movably installed on the first mounting seat and the movable rod is movably installed on the second mounting seat. Preferably, a second mounting base is installed at the front end of the rectangular card block, a trapezoidal slider is installed at the rear end of the rectangular card block, trapezoidal sliding grooves are opened near both ends of the rear surface of the rectangular groove, and trapezoidal sliders are slidably installed in the trapezoidal sliding grooves. Rectangular sliding holes are opened near the rear end of both ends of the rectangular groove, and rectangular card blocks are slidably installed in the rectangular sliding holes. Preferably, the upper surface of the movable base is provided with a rectangular slot, and a rectangular insert is inserted into the rectangular slot. Rectangular inserts are installed at the lower end of the protective cover near the four corners. Rectangular slots are provided on the inner surface of the rectangular inserts, and rectangular inserts are inserted into the rectangular slots. Compared with the prior art, the present invention has the following beneficial effects: With the fixed structure in place, when it is necessary to fix the equipment to the side of the table, first slide the L-shaped fixing seat into both sides of the table, then rotate the rotating block to move the clamping plate upward to cooperate with the L-shaped fixing seat to clamp the table until the rectangular anti-slip pad installed on the inner top surface of the clamping plate and the L-shaped fixing seat is in close contact with the upper and lower surfaces of the table. This completes the fixation of the equipment and prevents the equipment from moving when measuring the depth of the anterior chamber, thus affecting the measurement. With the adjustment structure, when adjusting the measuring instrument body, the PLC controller can start the servo motor to make the first slider slide in the first groove, thereby driving the moving seat installed on the upper end of the first slider to move until the measuring instrument body installed on the upper end of the moving seat moves to the appropriate position. It is not necessary to turn the two handles at the same time to drive the two screws to rotate, thus avoiding the screws from getting stuck. With the protective structure in place, when the measuring instrument body is not in use, the fixed block can be pulled to make the rectangular locking block move the trapezoidal slider installed at the rear end within the trapezoidal slide groove until the rectangular locking block retracts into the rectangular slide hole. Then, the rectangular insert installed at the lower end of the protective cover is aligned with the rectangular slot opened at the upper end of the moving base and inserted. Then, the fixed block is released, and under the action of the return spring, the rectangular locking block is driven into the rectangular slot opened on the inner surface of the rectangular insert. This prevents the measuring instrument body from being damaged by external impacts when it is not in use. Attached Figure Description Figure 1 This is a schematic diagram of the overall structure of an anterior chamber depth measurement device for refractive surgery according to the present invention; Figure 2 This is a cross-sectional view of the fixed structure of an anterior chamber depth measurement device for refractive surgery according to the present invention; Figure 3 This is a cross-sectional view of the adjustment structure of an anterior chamber depth measurement device for refractive surgery according to the present invention; Figure 4 This is an exploded view of the components of an anterior chamber depth measurement device for refractive surgery according to the present invention; Figure 5 This is a cross-sectional view of the protective structure of an anterior chamber depth measurement device for refractive surgery according to the present invention; Figure 6 This invention relates to an anterior chamber depth measurement device for use before refractive surgery. Figure 2 Enlarged view of point A in the middle. Figure 7 This invention relates to an anterior chamber depth measurement device for use before refractive surgery. Figure 3 Enlarged view of section B in the middle. Figure 8 This invention relates to an anterior chamber depth measurement device for use before refractive surgery. Figure 5 Enlarged view of point C in the middle. Figure 9 This invention relates to an anterior chamber depth measurement device for use before refractive surgery. Figure 5 Enlarged view of point D in the middle. In the diagram: 1. Base; 2. Support block; 201. Placement pad; 3. Movable seat; 4. Measuring instrument body; 5. Fixing structure; 501. L-shaped fixed seat; 502. Rotating block; 503. Bearing No. 1; 504. Clamping plate; 505. Rectangular slider; 506. Threaded rod No. 1; 507. Rectangular slide groove; 508. Rectangular anti-slip pad; 6. Adjustment structure; 601. Servo motor; 602. Slider No. 1; 603. Slide groove No. 1; 604. Bearing No. 2; 605. Rectangular transmission groove; 606. Circular transmission rod; 607. Bevel gear No. 2; 60 8. No. 2 threaded rod; 609. No. 3 bearing; 610. No. 1 bevel gear; 7. Protective structure; 701. Fixing block; 702. Protective cover; 703. Rectangular insert block; 704. Rectangular slot; 705. Rectangular slot; 706. Circular slide rod; 707. Circular slide groove; 708. Return spring; 709. Circular slider; 710. Rectangular groove; 711. Rectangular block; 712. No. 1 mounting base; 713. Movable rod; 714. No. 2 mounting base; 715. Rectangular sliding hole; 716. Rectangular block; 717. Trapezoidal slide groove; 718. Trapezoidal slider. Detailed Implementation To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments. Participation Figure 1-9As shown, an anterior chamber depth measurement device for refractive surgery includes a base 1 and a movable seat 3. A support block 2 is installed at one end of the upper surface of the base 1, and a soft pad 201 is installed on the upper end of the support block 2. The measuring instrument body 4 is installed in the middle of the upper end of the movable seat 3. A fixing structure 5 is provided at the lower end of the base 1. An adjustment structure 6 is provided inside the base 1. A protective structure 7 is provided on the movable seat 3. The fixing structure 5 includes an L-shaped fixing seat 501, a rotating block 502, a bearing 503, a clamping plate 504, a rectangular slider 505, a threaded rod 506, a rectangular groove 507, and a rectangular anti-slip pad 508. Specifically, the support block 2 installed at one end of the upper surface of the base 1 and the placement pad 201 installed at the upper end of the support block 2 are used to place the chin on the placement pad 201 for easy measurement. The measuring instrument body 4 installed at the middle of the upper end of the movable seat 3 is used to measure the anterior chamber depth. Participation Figure 1-6 As shown, L-shaped fixing seats 501 are installed at both the front and rear ends of the lower surface of the base 1. A rectangular sliding groove 507 is opened on the inner surface of the L-shaped fixing seat 501. A bearing 503 is installed at both the upper and lower ends of the rectangular sliding groove 507. A threaded rod 506 is installed on the bearing 503. A rotating block 502 is installed at the lower end of the threaded rod 506. A rectangular slider 505 is threaded on the outer surface of the threaded rod 506. A clamping plate 504 is installed on the inner surface of the rectangular slider 505. A rectangular anti-slip pad 508 is installed on the upper end of the clamping plate 504 and the inner top surface of the L-shaped fixing seat 501. Specifically, by rotating the rotating block 502 installed on the first threaded rod 506 on the first bearing 503 and the rotating block 502 installed at the lower end of the first threaded rod 506, the rotating block 502 can be rotated, causing the first threaded rod 506 to rotate on the first bearing 503. This causes the rectangular slider 505, which is threaded on the outer surface of the first threaded rod 506, to slide upward in the rectangular slide groove 507. This, in turn, causes the clamping plate 504 installed on the inner surface of the rectangular slider 505 to move upward until the clamping plate 504 and the rectangular anti-slip pad 508 installed on the inner top surface of the L-shaped fixing seat 501 are tightly fitted with the upper and lower surfaces of the table, thus completing the fixation of the equipment. Participation Figure 1-7As shown, the adjustment structure 6 includes a servo motor 601, a first slider 602, a first slide groove 603, a second bearing 604, a rectangular transmission groove 605, a circular transmission rod 606, a second bevel gear 607, a second threaded rod 608, a third bearing 609, and a first bevel gear 610. A rectangular transmission groove 605 is provided inside the base 1. Second bearings 604 are installed at both the front and rear ends of the rectangular transmission groove 605. Circular transmission rods 606 are installed on the second bearings 604. A servo motor 601 is fixedly installed on the front surface of the base 1. The rotating part of the servo motor 601 is connected to the circular transmission rod 606. 06. A first bevel gear 610 is installed on the outer surface near the front and rear ends. A first slide groove 603 is opened on the upper surface of the base 1 near the front and rear ends. A third bearing 609 is installed at both ends of the first slide groove 603. A second threaded rod 608 is installed on the third bearing 609. A second bevel gear 607 is installed at the other end of the second threaded rod 608. The second bevel gear 607 meshes with the first bevel gear 610. A first slider 602 is threaded on the outer surface of the second threaded rod 608. A movable seat 3 is installed on the upper end of the first slider 602. The servo motor 601 is controlled by a PLC controller and connected to an external power supply. Specifically, the servo motor 601 fixedly mounted on the front surface of the base 1 and the circular transmission rod 606 connected to the rotating part of the servo motor 601 can be controlled by the PLC controller to start the servo motor 601, causing the rotating part of the servo motor 601 to drive the circular transmission rod 606 to rotate on the second bearing 604, thereby driving the first bevel gear 610 mounted near the front and rear ends of the outer surface of the circular transmission rod 606 to rotate. Because the second bevel gear 607 meshes with the first bevel gear 610, it drives the second threaded rod 608 to rotate on the rectangular groove 509, causing the first slider 602 threaded on the outer surface of the rectangular anti-slip pad 508 to slide in the first slide groove 603, thereby driving the movable seat 3 mounted on the upper end of the first slider 602 to move until the measuring instrument body 4 mounted on the upper end of the movable seat 3 moves to the appropriate position. Participation Figure 1-9As shown, the protective structure 7 includes a fixed block 701, a protective cover 702, a rectangular insert block 703, a rectangular slot 704, a rectangular groove 705, a circular slide rod 706, a circular slide groove 707, a return spring 708, a circular slider 709, a rectangular groove 710, a rectangular block 711, a first mounting base 712, a movable rod 713, a second mounting base 714, a rectangular sliding hole 715, a rectangular slot 716, a trapezoidal slide groove 717, and a trapezoidal slider 718. The movable base 3 has a circular slide groove 707 inside, and a circular slider 709 is slidably installed within the circular slide groove 707. A circular slider 709 is installed on the outer surface of the slide rod 706 near the rear end. A return spring 708 is sleeved on the front end of the circular slider 709 on the outer surface of the slide rod 706. A fixing block 701 is installed on the front end of the circular slide rod 706. Rectangular slots 710 are opened at both the front and rear ends of the circular slide groove 707 inside the movable seat 3. Rectangular blocks 711 are installed on the outer surface of the circular slide rod 706 near the front and rear ends. A first mounting seat 712 is installed at both ends of the rectangular block 711. A movable rod 713 is movably installed on the first mounting seat 712. A movable rod 713 is movably installed on the second mounting seat 714. Specifically, the fixed block 701 installed at the front end of the circular slide rod 706 can be pulled to move the circular slider 709 installed near the rear end of the circular slide rod 706 forward in the circular slide groove 707, and squeeze the return spring 708. At the same time, it can move the rectangular block 711 installed near the front and rear ends of the circular slide rod 706 forward, and move the first mounting seat 712 installed at both ends of the rectangular locking block 511 forward, so that the front end of the movable rod 713 rotates on the first mounting seat 712, and the rear end of the movable rod 713 rotates on the second mounting seat 714, and moves the second mounting seat 714 towards the middle. Participation Figure 1-9 As shown, a second mounting base 714 is installed at the front end of the rectangular block 716, and a trapezoidal slider 718 is installed at the rear end of the rectangular block 716. Trapezoidal sliding grooves 717 are opened on the rear surface of the rectangular groove 710 near both ends, and trapezoidal sliders 718 are slidably installed in the trapezoidal sliding grooves 717. Rectangular sliding holes 715 are opened on both ends of the rectangular groove 710 near the rear end, and rectangular blocks 716 are slidably installed in the rectangular sliding holes 715. A rectangular slot 705 is opened on the upper surface of the movable base 3, and a rectangular insert 703 is inserted into the rectangular slot 705. A rectangular insert 703 is installed on the lower end of the protective cover 702 near the four corners. A rectangular slot 704 is opened on the inner surface of the rectangular insert 703, and a rectangular block 716 is inserted into the rectangular slot 704. Specifically, through the second mounting base 714 installed at the front end of the rectangular block 716 and the trapezoidal slider 718 installed at the rear end of the rectangular block 716, when the second mounting base 714 moves towards the middle, the rectangular block 716 drives the trapezoidal slider 718 installed at the rear end to slide in the trapezoidal slide groove 717 until the rectangular block 716 retracts into the rectangular slide hole 715. Then, the rectangular insert 703 installed at the lower end of the protective cover 702 is aligned with the rectangular slot 705 opened at the upper end of the movable seat 3 and inserted. Then, the fixing block 701 is released, and under the action of the return spring 708, the rectangular block 716 is driven to insert into the rectangular slot 704 opened on the inner surface of the rectangular insert 703. It should be noted that this invention is a device for measuring anterior chamber depth before refractive surgery. When the device needs to be fixed to the edge of a table, first slide the L-shaped fixing base 501 into both sides of the table, then rotate the rotating block 502. The rotation of the rotating block 502 drives the first threaded rod 506 to rotate on the first bearing 503, causing the rectangular slider 505, which is threaded on the outer surface of the first threaded rod 506, to slide upward in the rectangular slide groove 507. This causes the clamping plate 504, which is installed on the inner surface of the rectangular slider 505, to move upward until the clamping plate 504 and the rectangular anti-slip pad 508 installed on the inner top surface of the L-shaped fixing base 501 are in close contact with the upper and lower surfaces of the table, thus completing the device installation. To prevent the equipment from moving during the measurement of the anterior chamber depth and thus affecting the measurement, when adjusting the measuring instrument body 4, the PLC controller starts the servo motor 601, causing the rotating part of the servo motor 601 to drive the circular transmission rod 606 to rotate on the second bearing 604. This, in turn, drives the first bevel gear 610 mounted near the front and rear ends of the circular transmission rod 606 to rotate. Because the second bevel gear 607 meshes with the first bevel gear 610, it drives the second threaded rod 608 to rotate on the rectangular groove 509. This causes the first slider 602, which is threaded onto the outer surface of the rectangular anti-slip pad 508, to slide within the first slide groove 603, thereby driving the first slider 602... The upper movable base 3 moves until the measuring instrument body 4 mounted on the upper part of the movable base 3 moves to the appropriate position. It is not necessary to rotate both handles at the same time to drive the two screws to rotate, thus avoiding screw jamming. When the measuring instrument body 4 is not in use, pull the fixed block 701, which causes the circular slider 709 mounted near the rear end of the circular slide rod 706 to slide forward in the circular slide groove 707 and compress the return spring 708. At the same time, it causes the rectangular blocks 711 mounted near the front and rear ends of the circular slide rod 706 to move forward, which in turn causes the first mounting base 712 mounted at both ends of the rectangular locking block 511 to move forward, so that the front end of the movable rod 713 rotates on the first mounting base 712. The rear end of the movable rod 713 rotates on the second mounting base 714, causing the second mounting base 714 to move towards the center. This causes the rectangular locking block 716 to slide the trapezoidal slider 718 mounted at the rear end within the trapezoidal slide groove 717 until the rectangular locking block 716 retracts into the rectangular slide hole 715. Then, the rectangular insert 703 mounted at the lower end of the protective cover 702 is aligned with the rectangular slot 705 opened at the upper end of the movable base 3 and inserted. Then, the fixing block 701 is released, and under the action of the return spring 708, the rectangular locking block 716 is driven to insert into the rectangular slot 704 opened on the inner surface of the rectangular insert 703. This prevents the measuring instrument body 4 from being damaged by external impacts when it is not in use. The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A device for measuring anterior chamber depth before refractive surgery, characterized in that: The device includes a base (1) and a movable seat (3). A support block (2) is installed on one end of the upper surface of the base (1). A soft pad (201) is installed on the upper end of the support block (2). A measuring instrument body (4) is installed in the middle of the upper end of the movable seat (3). A fixing structure (5) is provided at the lower end of the base (1). An adjustment structure (6) is provided inside the base (1). A protective structure (7) is provided on the movable seat (3). The fixing structure (5) includes an L-shaped fixing seat (501), a rotating block (502), a bearing (503), a clamping plate (504), a rectangular slider (505), a threaded rod (506), a rectangular groove (507), and a rectangular anti-slip pad (508).

2. The anterior chamber depth measurement device for refractive surgery according to claim 1, characterized in that: The base (1) has L-shaped fixing seats (501) installed at both the front and rear ends of its lower surface. The inner surface of the L-shaped fixing seat (501) has a rectangular sliding groove (507). The upper and lower ends of the rectangular sliding groove (507) are each equipped with a bearing (503). The bearing (503) is equipped with a threaded rod (506). The lower end of the threaded rod (506) is equipped with a rotating block (502). The outer surface of the threaded rod (506) is threaded with a rectangular slider (505). The inner surface of the rectangular slider (505) is equipped with a clamping plate (504). The upper end of the clamping plate (504) and the inner top surface of the L-shaped fixing seat (501) are both equipped with rectangular anti-slip pads (508).

3. The anterior chamber depth measurement device for refractive surgery according to claim 2, characterized in that: The adjustment structure (6) includes a servo motor (601), a first slider (602), a first slide groove (603), a second bearing (604), a rectangular transmission groove (605), a circular transmission rod (606), a second bevel gear (607), a second threaded rod (608), a third bearing (609), and a first bevel gear (610). The base (1) has a rectangular transmission groove (605) inside, and the second bearing (604) is installed at both the front and rear ends of the rectangular transmission groove (605).

4. The anterior chamber depth measurement device for refractive surgery according to claim 3, characterized in that: A circular transmission rod (606) is installed on the second bearing (604). A servo motor (601) is fixedly installed on the front surface of the base (1). The rotating part of the servo motor (601) is connected to the circular transmission rod (606). A bevel gear (610) is installed on the outer surface of the circular transmission rod (606) near the front and rear ends. A slide groove (603) is opened on the upper surface of the base (1) near the front and rear ends.

5. The anterior chamber depth measurement device for refractive surgery according to claim 4, characterized in that: The first slide groove (603) is equipped with a third bearing (609) at both ends. A second threaded rod (608) is installed on the third bearing (609). A second bevel gear (607) is installed at the other end of the second threaded rod (608). The second bevel gear (607) meshes with the first bevel gear (610). A first slider (602) is threaded on the outer surface of the second threaded rod (608). A movable seat (3) is installed on the upper end of the first slider (602).

6. The anterior chamber depth measurement device for refractive surgery according to claim 5, characterized in that: The protective structure (7) includes a fixed block (701), a protective cover (702), a rectangular insert (703), a rectangular slot (704), a rectangular groove (705), a circular slide rod (706), a circular slide groove (707), a reset spring (708), a circular slider (709), a rectangular groove (710), a rectangular block (711), a first mounting base (712), a movable rod (713), a second mounting base (714), a rectangular sliding hole (715), a rectangular block (716), a trapezoidal slide groove (717), and a trapezoidal slider (718).

7. The anterior chamber depth measurement device for refractive surgery according to claim 6, characterized in that: The movable seat (3) has a circular groove (707) inside, and a circular slider (709) is slidably installed in the circular groove (707). A circular slider (709) is installed on the outer surface of the circular slide rod (706) near the rear end. A return spring (708) is sleeved on the front end of the circular slider (709) on the outer surface of the circular slide rod (706). A fixing block (701) is installed on the front end of the circular slide rod (706).

8. The anterior chamber depth measurement device for refractive surgery according to claim 7, characterized in that: Rectangular slots (710) are provided at both the front and rear ends of the circular slide groove (707) inside the movable seat (3). Rectangular blocks (711) are installed on the outer surface of the circular slide rod (706) near the front and rear ends. A first mounting seat (712) is installed at both ends of the rectangular block (711). A movable rod (713) is movably installed on the first mounting seat (712). A movable rod (713) is movably installed on the second mounting seat (714).

9. The anterior chamber depth measurement device for refractive surgery according to claim 8, characterized in that: The rectangular card block (716) is equipped with a second mounting base (714) at its front end, and a trapezoidal slider (718) is installed at its rear end. The rectangular groove (710) has trapezoidal sliding grooves (717) near both ends on its rear surface. The trapezoidal slider (718) is slidably installed in the trapezoidal sliding grooves (717). The rectangular groove (710) has rectangular sliding holes (715) near both ends on its surface. The rectangular card block (716) is slidably installed in the rectangular sliding holes (715).

10. The anterior chamber depth measurement device for refractive surgery according to claim 9, characterized in that: The upper surface of the movable base (3) is provided with a rectangular slot (705), and a rectangular insert (703) is inserted into the rectangular slot (705). A rectangular insert (703) is installed at the lower end of the protective cover (702) near the four corners. A rectangular slot (704) is provided on the inner surface of the rectangular insert (703), and a rectangular insert (716) is inserted into the rectangular slot (704).

Images