Auxiliary positioning device for detecting optical and mechanical properties of intraocular lens

Abstract

The auxiliary positioning device comprises a main body, the main body is cylindrical, a through hole is formed in the center of the main body, the through hole is conical, the upper opening of the through hole is large, the lower opening of the through hole is small, and the top of the through hole horizontally extends towards the outer side to form a supporting face used for bearing the intraocular lens to be detected. Four limiting grooves are formed between the supporting face and the inner side wall of the top of the main body, the limiting grooves are used for containing a loop structure of an intraocular lens to be detected, two sets of axial position base lines are arranged on the circumference of the top of the main body in a crossed mode, and the axial position base lines are aligned with astigmatism axial position marks of the intraocular lens to be detected in the using process. The device is simple in structure and convenient to operate, can accurately position the artificial lens, can accurately detect the base arc radius, the total diameter, the center thickness, the striding height, the vault height and the rear vertex power of the artificial lens, can effectively improve the accuracy and the repeatability of a detection result, and is wide in application prospect and beneficial to popularization and application.

Description

Technical Field

[0001] This utility model relates to the field of artificial lens technology, and in particular to an auxiliary positioning device for detecting the optical and mechanical properties of an artificial lens. Background Technology

[0002] Currently, the prevalence of high myopia is increasing rapidly. Epidemiological surveys indicate that by 2050, it is projected that 938 million people (9.8% of the world's population) will have high myopia. Clinically, methods for correcting high myopia include: eyeglasses, contact lenses, corneal refractive surgery, posterior chamber intraocular lens implantation, and refractive lens replacement surgery.

[0003] For patients with high myopia, wearing thick glasses every day causes significant discomfort and inconvenience to the eyes. Contact lenses require high levels of personal and environmental hygiene, are prone to breakage and loss, have a short lifespan, and long-term use can easily lead to complications such as dry eye and corneal neovascularization. Although corneal refractive surgery has become increasingly sophisticated, its effectiveness, safety, and predictability are clinically recognized. However, for patients with high myopia, especially very high myopia, and those with insufficient corneal thickness or high corneal curvature, corrective surgery carries high risks, poor results, and is often irreversible. Intraocular lens implantation (IOL) surgery has emerged to address this issue. It not only reduces the incidence of postoperative dry eye and improves visual quality, but is also suitable for patients with thin or poorly shaped corneas or high myopia. Compared to corneal refractive surgery, IOL surgery also offers advantages such as reversibility, no corneal ablation required, and wider applicability, gradually becoming the common choice for patients with high myopia to get rid of glasses.

[0004] Currently, the intraocular lens implantation technology is monopolized by STAAR Surgical (STAAR), a Swiss company that handles all aspects of material production, manufacturing, and testing in-house. Due to the limited number of manufacturers, current testing methods for intraocular lenses involve equilibration in a liquid before testing. This technology is concentrated among well-known international optical testing equipment companies (such as Rotlax, Lenser, and Lambda), making the testing barriers difficult to overcome. The high cost of testing components and the complex usage and maintenance procedures present challenges and uncertainties in testing the core optomechanical properties of intraocular lenses.

[0005] Existing intraocular lens (IOL) testing methods mostly involve placing the IOL in a liquid-filled fixture to allow it to freely expand and reach a stable equilibrium, or placing the IOL directly on a liquid-filled support within the testing equipment. Because these methods rely on the fluidity of the liquid within the testing components and are highly sensitive to environmental vibrations, particularly those affecting the surrounding equipment, the repeatability of IOL test data is uncertain. Furthermore, the aforementioned testing devices are mostly proprietary components provided by the equipment manufacturers. Some of these components contain glass or quartz, leading to complex maintenance procedures, stringent environmental requirements (class 10,000 cleanroom or higher), and poor material corrosion resistance. Their cost is relatively high, and their applicability is limited, preventing compatibility with other testing equipment. For IOLs with astigmatism correction, the lack of axis markings in the testing components for cylinder lens testing at specific axes results in cylinder lens failures due to axis mismatch, severely impacting accuracy and increasing testing frequency and efficiency. Therefore, there is an urgent need to develop an auxiliary positioning device for testing the optical-mechanical properties of intraocular lenses to address these technical problems.

[0006] In view of the above, this utility model is hereby proposed. Utility Model Content

[0007] The purpose of this invention is to provide an auxiliary positioning device for testing the optical and mechanical properties of an intraocular lens (IOL). It has a simple structure, is easy to operate, and can accurately position the IOL. It can accurately detect the base radius, total diameter, center thickness, straddle height, arch height, and posterior vertex power of the IOL, effectively improving the accuracy and repeatability of the test results. It has broad application prospects and is conducive to widespread application.

[0008] To achieve the above objectives, this utility model provides an auxiliary positioning device for testing the optical and mechanical properties of an intraocular lens, comprising a main body, which is cylindrical with a through hole at its center. The through hole is conical, with a larger upper opening and a smaller lower opening. The top of the through hole extends horizontally outward to form a support surface for supporting the intraocular lens to be tested. Four limiting grooves are formed between the support surface and the inner sidewall of the top of the main body. The limiting grooves are used to accommodate the loop structure of the intraocular lens to be tested. Two sets of axis baselines are provided in a cross shape on the circumference of the top of the main body. In use, the axis baselines are aligned with the astigmatic axis mark of the intraocular lens to be tested.

[0009] Preferably, the axis baseline is straight and extends vertically from the outer side of the circumference at the top of the body to the inner side.

[0010] Preferably, the shape of the limiting groove matches the haptic structure of the intraocular lens to be tested.

[0011] Preferably, the support surface and the limiting groove are machined by turning and milling.

[0012] Preferably, the main body is a PMMA main body.

[0013] Preferably, the main body is a metal body.

[0014] The present invention provides an auxiliary positioning device for testing the optical and mechanical properties of an intraocular lens, which has the following beneficial effects.

[0015] 1. The limiting groove of this utility model can effectively avoid the movement of the artificial lens due to the flow of liquid, thus improving the accuracy and repeatability of the test results.

[0016] 2. The materials used in the manufacture of this utility model can be selected arbitrarily according to the requirements of the testing equipment, resulting in low manufacturing costs and dimensions suitable for other similar equipment.

[0017] 3. The axis baseline of this utility model is used as an axis detection mark with astigmatism design. It can be checked against the axis of the intraocular lens itself and the axis of the detection equipment before detection. Before detection, the zero point position of the astigmatism axis is checked with the detection equipment, which is of guiding significance for the cylinder power detection of a specific axis of the intraocular lens. Attached Figure Description

[0018] Figure 1 A perspective view of an auxiliary positioning device for testing the optical and mechanical properties of an intraocular lens provided by this utility model;

[0019] Figure 2 This is a schematic diagram showing the alignment of the axis baseline of an auxiliary positioning device for testing the optical and mechanical properties of an intraocular lens with the astigmatic axis mark of the intraocular lens.

[0020] In the picture:

[0021] 1. Support surface 2. Axial baseline 3. Main body 4. Through hole 5. Top of main body 6. Limiting groove 7. Intraocular lens 8. Astigmatism axis marker 9. Inner wall. Detailed Implementation

[0022] The present invention will be further described below with reference to specific embodiments and accompanying drawings to help understand the content of the present invention.

[0023] like Figure 1The image shown is a perspective view of an auxiliary positioning device for testing the optical-mechanical properties of an intraocular lens (IOL) according to this invention. The auxiliary positioning device includes a main body 3, which is cylindrical with a through-hole 4 at its center. The through-hole 4 is conical, with a larger upper opening and a smaller lower opening. The top of the through-hole 4 extends horizontally outward to form a support surface 1 for supporting the IOL 7 to be tested. Four limiting grooves 6 are formed between the support surface 1 and the inner wall 9 of the top 5 of the main body. The limiting grooves 6 are used to accommodate the haptic structure of the IOL 7 to be tested. Two sets of axial baselines 2 are cross-shaped on the circumference of the top 5 of the main body. In use, the axial baselines 2 are aligned with the astigmatic axis mark 8 of the IOL 7 to be tested. The axial baselines 2 are straight lines extending vertically from the outer side to the inner side of the circumference of the top 5 of the main body. The shape of the limiting grooves 6 matches the haptic structure of the IOL 7 to be tested. The support surface 1 and the limiting grooves 6 are machined by turning and milling. The main body 3 is a PMMA body or a metal body.

[0024] The working principle of this utility model is as follows:

[0025] During operation, use tweezers with a silicone protective sleeve to grasp one side of the intraocular lens 7 and place it on the support surface 1 of the auxiliary positioning device. The intraocular lens 7 can naturally conform to the support surface 1 of the auxiliary positioning device. Then, optical and mechanical performance testing can be performed on the corresponding testing equipment. For intraocular lenses 7 with astigmatic axis marks 8, the astigmatic axis marks 8 on both sides of the surface of the intraocular lens 7 need to be aligned with the axis baseline 2 of the auxiliary positioning device before optical and mechanical performance testing. For example... Figure 2 The diagram shown is a schematic diagram of the alignment between the axis baseline of the auxiliary positioning device for detecting the optical and mechanical properties of an intraocular lens and the astigmatic axis mark of the intraocular lens provided by this utility model.

[0026] The axis baseline 2 of this invention serves as an axis detection marker with astigmatism design. It allows for pre-test verification with the axis of the intraocular lens 7 itself and the axis of the testing equipment. Verifying the zero point position of the astigmatism axis with the testing equipment before testing provides guidance for cylinder power testing at specific axes of the intraocular lens 7. The support surface 1 of this invention is machined using a high-precision CNC lathe to ensure a smooth surface and perfect match with the haptic structure of the intraocular lens 7 under test, effectively improving the accuracy and repeatability of the test results. The limiting groove 6 of this invention is machined using a high-precision CNC lathe to ensure its tolerance meets the dimensional requirements of the total diameter of the intraocular lens 7. The limiting groove 6 effectively prevents the intraocular lens 7 from moving around due to liquid flow during testing in liquid, thus improving the accuracy and repeatability of the test results. The materials used in this invention can be selected arbitrarily according to the requirements of the testing equipment, resulting in low manufacturing costs. For example, PMMA (Polymethyl methacrylate) can be matched with OCT (Optical Coherence Tomography) related testing equipment, while metal materials (stainless steel, aluminum, etc.) can be perfectly matched with the mainstream multi-dimensional measuring instruments currently on the market.

[0027] This article uses specific examples to illustrate the inventive concept in detail. The description of the above embodiments is only for the purpose of helping to understand the core idea of ​​this utility model. It should be noted that any obvious modifications, equivalent substitutions or other improvements made by those skilled in the art without departing from the inventive concept should be included within the protection scope of this utility model.

Claims

1. An auxiliary positioning device for detecting the optical-mechanical properties of an intraocular lens, characterized in that, The device includes a main body, which is cylindrical in shape and has a through hole at its center. The through hole is conical, with a larger upper opening and a smaller lower opening. The top of the through hole extends horizontally outward to form a support surface for supporting the intraocular lens to be tested. Four limiting grooves are formed between the support surface and the inner sidewall of the top of the main body. The shape of the limiting grooves matches the haptic structure of the intraocular lens to be tested. The limiting grooves are used to accommodate the haptic structure of the intraocular lens to be tested. Two sets of axis baselines are provided in a cross shape on the circumference of the top of the main body. In use, the axis baselines are aligned with the astigmatic axis markings of the intraocular lens to be tested.

2. The auxiliary positioning device for detecting the optical-mechanical properties of an intraocular lens according to claim 1, characterized in that, The axial baseline is straight and extends vertically from the outer side of the circumference at the top of the main body to the inner side.

3. The auxiliary positioning device for detecting the optical-mechanical properties of an intraocular lens according to claim 2, characterized in that, The support surface and the limiting groove are machined by turning and milling.

4. The auxiliary positioning device for detecting the optical-mechanical properties of an intraocular lens according to claim 3, characterized in that, The subject is a PMMA subject.

5. The auxiliary positioning device for detecting the optical-mechanical properties of an intraocular lens according to claim 3, characterized in that, The main body is a metal body.

Images