An intraocular lens with a crystalline lens

Abstract

The utility model relates to the field of ophthalmic refraction technology, especially to a kind of artificial lens of phakic eye. Artificial lens of phakic eye includes optical unit and support unit, by the back surface of artificial lens is set as aspheric surface, and make its curvature from the center of artificial lens to periphery continuously and gradually decrease, using such geometric configuration can be highly adapted to natural lens of human eye front surface also presents by central to periphery curvature gradually decreasing aspheric surface morphology. The high consistency on this form makes the artificial lens of the utility model after implantation, its back surface can form a more uniform, stable and safe gap with natural lens front surface, effectively avoids unnecessary physical contact or friction between the two, thereby greatly improves the long-term comfort of patient wearing and the stability of postoperative visual quality, truly solves the safety hazard and the problem of poor comfort of prior art.

Description

Technical Field

[0001] This utility model relates to the field of ocular optics technology, and in particular to a phakic intraocular lens. Background Technology

[0002] Phacoid intraocular lenses (IOLs) are used for refractive correction of the human eye, with posterior ciliary sulcus fixed IOLs being the most widely used. For example, ... Figures 1 to 3 The illustrated posterior ciliary sulcus-fixed phakic intraocular lens structure includes an optical section providing the optical power and aberration correction required by the human eye; a support section forming the main shape of the intraocular lens; and four haptics for fixation within the ciliary sulcus of the eye. It is noteworthy that the number of haptics in the posterior ciliary sulcus-fixed phakic intraocular lens structure is not limited to four; it can also be other numbers.

[0003] After a phakic intraocular lens is implanted into the eye, its positional relationship relative to the natural tissues of the eye (also known as gap analysis) greatly affects the safety of the implantation. This includes the relative relationship between the posterior surface of the intraocular lens and the anterior surface of the transparent lens, as well as the relative relationship between the anterior surface of the intraocular lens and the iris and corneal endothelium, etc.

[0004] Specifically, a relatively safe gap needs to be maintained between the posterior surface of the phakic intraocular lens and the transparent lens. This gap includes the longitudinal distance from the center of the lens to various locations along the ciliary sulcus, and the peripheral gap must not be less than the central gap. Existing phakic intraocular lenses, due to their unreasonable surface design, allow the phakic intraocular lens to come into contact with the transparent lens, affecting wearing comfort. Utility Model Content

[0005] This invention provides a phakic intraocular lens to solve the problem that existing phakic intraocular lenses have unreasonable surface design, causing the phakic intraocular lens to come into contact with the transparent lens, affecting wearing comfort.

[0006] This invention provides a phakic intraocular lens, which is used to implant into the anterior surface of the natural lens in the eye. It includes an optical part and a support part. The support part is disposed on the outer periphery of the optical part to form a flat haptic intraocular lens. The posterior surface of the intraocular lens is aspherical. The curvature of the posterior surface of the intraocular lens gradually decreases from the center of the intraocular lens to the periphery.

[0007] According to the present invention, an intraocular lens with a phakic eye is provided, wherein the aspheric scaling factor η on the posterior surface of the intraocular lens is greater than 1, and the curve of η along the radius r of the intraocular lens satisfies the following formula (1), wherein the aspheric scaling factor η refers to the ratio of the central curvature to the peripheral curvature within a specific range; (1) Wherein, φ3=[1.9E-5,6.1E-2], φ2=[3.7E-3,1.5E-1], and φ1=[3.8E-5,7.5E-2].

[0008] According to the present invention, the diameter of the intraocular lens, the diameter or radius of curvature of the optical part, and the diameter of the aspherical surface satisfy any combination of at least one or more of the following: The diameter of the artificial lens is 10-15 mm; The diameter of the optical component is 5.0-7.0 mm; The diameter of the aspherical surface is 7.0-14.2 mm; When the diameter of the aspherical surface is 9 mm, η > 1; The radius of curvature of the posterior surface of the intraocular lens at the apex of the optical part is greater than 6.0 mm; When the diameter of the aspherical surface is 9 mm, the radius of curvature of the apex of the optical part is greater than 20 mm.

[0009] According to the present invention, the posterior surface of the intraocular lens is a secondary aspheric surface, the eccentricity e of the aspheric surface of the posterior surface of the intraocular lens is greater than 0, and the sag Z of each point on the secondary aspheric surface satisfies the following formula (2). (2) Where x is the diameter of the artificial lens, e is the eccentricity of the aspherical surface, and c is the reciprocal of the vertex radius of curvature r.

[0010] According to the present invention, the posterior surface of the intraocular lens is a high-order aspheric surface, and the curvature CV of each point on the high-order aspheric surface satisfies the following formula (3). (3) The height Z satisfies the following formula (4); (4) Where is the diameter of the artificial lens, Q is the aspheric coefficient, and Q = -e c is the reciprocal of the vertex radius of curvature r, A4, A6, A8 For aspherical higher-order terms, the coefficients are given.

[0011] According to the present invention, a phakic intraocular lens is provided, wherein the outer periphery of the support portion is provided with a plurality of foot straps.

[0012] According to the present invention, a phakic intraocular lens is provided, wherein four haptics are provided on the outer periphery of the support portion, the four haptics are arranged symmetrically in pairs, and the width of the haptics is 1.0-3.0mm.

[0013] According to the present invention, a phakic intraocular lens is provided, wherein the posterior arch height of the intraocular lens is 1.0-2.0 mm.

[0014] According to the present invention, the posterior surfaces of the optical part and the support part are both aspherical, and the curvature of the posterior surfaces of the optical part and the support part gradually decreases and continues from the center of the optical part to the edge of the haptic.

[0015] According to the present invention, the front surface of the optical part and the front surface of the support part are connected by a smooth connecting section.

[0016] According to the present invention, the front surface of the smooth connecting segment is aspherical, the curvature of the front surface of the smooth connecting segment near the optical part is the same as the curvature of the front surface of the optical part, the curvature of the front surface of the smooth connecting segment near the support part is the same as the curvature of the front surface of the support part, and the curvature of the front surface of the smooth connecting segment is continuous.

[0017] According to the present invention, the posterior surface of the intraocular lens and the posterior surface of the smooth connecting segment are both spherical, and the curvature of the spherical surface is 500-2000.

[0018] According to the present invention, a phakic intraocular lens is provided, wherein the intraocular lens has a hole, and the hole is provided to satisfy at least one of the following: The optical part has a central hole with a diameter of 0.25-0.4 mm. The outer periphery of the support is provided with a foot stalk, and at least one of the support and the foot stalk is provided with a positioning hole, the diameter of which is 0.35-0.8mm.

[0019] According to the present invention, a phakic intraocular lens is provided for the correction of refractive errors, presbyopia, and refractive errors accompanied by vision problems in the human eye.

[0020] This invention provides a phakic intraocular lens (IOL) with an aspherical posterior surface whose curvature continuously decreases from the center to the periphery. This geometric structure closely matches the aspherical shape of the anterior surface of the natural lens, which also exhibits a gradual decrease in curvature from the center to the periphery. This high degree of morphological consistency allows the posterior surface of the IOL to form a more uniform, stable, and safe gap with the anterior surface of the natural lens after implantation, effectively avoiding unnecessary physical contact or friction. Compared to the risks of localized contact and pressure on the natural lens that may result from unreasonable surface design in existing technologies, the phakic IOL of this invention significantly improves safety. Furthermore, by maintaining a stable and safe gap, it ensures normal aqueous humor flow and reduces irritation to intraocular tissues, thereby greatly improving long-term patient comfort and postoperative visual quality stability, truly solving the safety hazards and poor comfort issues of existing technologies. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the front view structure of the artificial lens provided by this utility model.

[0023] Figure 2 It is along Figure 1 A schematic diagram of the side view section structure made by the middle section line AA.

[0024] Figure 3 This is a schematic diagram illustrating the working principle of the artificial lens provided by this utility model.

[0025] Figure 4 This is a curvature distribution diagram of the posterior surface of the artificial lens in Embodiment 1 of this utility model.

[0026] Figure 5 This is a sag distribution diagram of the posterior surface of the artificial lens in Embodiment 1 of this utility model.

[0027] Figure 6 This is a sag distribution diagram of the anterior surface of the artificial lens in Embodiment 1 of this utility model.

[0028] Figure 7 This is a side view cross-sectional structural diagram of the artificial lens provided by this utility model.

[0029] Figure 8 This is a sag distribution diagram of the posterior surface of the artificial lens in Embodiment 2 of this utility model.

[0030] Figure 9 This is a curvature distribution diagram of the posterior surface of the artificial lens in Embodiment 2 of this utility model.

[0031] Figure 10 This is a sag distribution diagram of the posterior surface of the artificial lens in Embodiment 3 of this utility model.

[0032] Figure 11 This is a curvature distribution diagram of the posterior surface of the artificial lens in Embodiment 3 of this utility model.

[0033] Figure label: 10. Optical part; 20. Support part; 30. Foot haptic; 40. Posterior surface of the intraocular lens; 50. Anterior surface of the natural lens; 60. Smooth connecting segment; 70. Diameter of the intraocular lens. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0035] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0037] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0039] Before introducing the specific structure and function of the phakic intraocular lens, let's first explain the relevant terminology: 1. Terms indicating directional relationships, such as "anterior" and "posterior," are relative to the distance from the corneal surface of the eye. For example, the "anterior surface" is the surface that is closer to the cornea than the "posterior surface."

[0040] 2. The center refers to the geometric center of the lens or the human eye.

[0041] 3. The aspherical scaling factor η refers to the ratio of the central curvature to the peripheral curvature within a specific range.

[0042] like Figure 7As shown, the artificial lens is a natural lens anterior surface 50 for implantation into the eye. The phakic artificial lens includes an optical part 10 and a support part 20. The support part 20 is disposed on the outer periphery of the optical part 10 to form a flat haptic artificial lens. The posterior surface 40 of the artificial lens is aspherical. The curvature of the posterior surface of the artificial lens gradually decreases from the center of the artificial lens to the periphery.

[0043] The phakic intraocular lens provided by this invention features a posterior surface 40 that is aspherical with a curvature that gradually decreases from the center to the periphery. Furthermore, the aspherical shape of the posterior surface is optimized and controlled using an aspherical scaling factor η (the ratio of central curvature to peripheral curvature within a specific range). This geometric structure highly adapts to the aspherical shape of the anterior surface 50 of the natural lens, which also exhibits a gradual decrease in curvature from the center to the periphery. This high degree of morphological consistency allows the posterior surface of the intraocular lens to form a more uniform, stable, and safe gap with the anterior surface 50 of the natural lens after implantation, effectively avoiding unnecessary physical contact or friction. Compared to the risks of localized contact and pressure on the natural lens that may result from unreasonable surface design in existing technologies, the phakic intraocular lens provided by this invention significantly improves safety. At the same time, by maintaining a stable safety gap, ensuring the normal flow of aqueous humor, and reducing stimulation to intraocular tissues, the long-term comfort of patients and the stability of postoperative visual quality are greatly improved, truly solving the safety hazards and poor comfort problems of existing technologies.

[0044] In one embodiment of this utility model, the aspheric scaling factor η on the posterior surface of the intraocular lens is greater than 1, and the curve of η changing along the radius r of the intraocular lens satisfies the following formula (1). (1) Wherein, φ3=[1.9E-5,6.1E-2], φ2=[3.7E-3,1.5E-1], and φ1=[3.8E-5,7.5E-2]. Unlike conventional spherical or simple aspherical designs, the aspherical scaling factor η of this invention is not a fixed value, but varies with the lens radius r, satisfying the above functional relationship. This structure allows for more precise and personalized control of the light path throughout the entire optical region, more effectively compensating for spherical aberration and other higher-order aberrations introduced by the cornea and the intraocular lens itself.

[0045] In one embodiment of this invention, the diameter of the aspherical surface is 7.0-14.2 mm, preferably 8.5-11.5 mm. Setting the lower limit of the aspherical surface diameter to 7.0 mm ensures that the effective optical zone of the intraocular lens can completely cover the entire pupil even in low-light environments (when the pupil is dilated), thereby effectively avoiding adverse visual phenomena such as glare and halo caused by the edge of the optical zone, and ensuring a high-quality visual experience under different lighting conditions.

[0046] In one embodiment of this invention, when the diameter of the aspherical surface is 9 mm, η > 1. Preferably, the value of η ranges from 1.2 to 3.0. An η value within this range ensures that the intraocular lens can accurately and efficiently compensate for the positive spherical aberration inherent in the human cornea within a diameter of 9 mm.

[0047] In one embodiment of this invention, the radius of curvature of the posterior surface 40 of the artificial lens at the apex of the optical portion is greater than 6.0 mm. This structure fundamentally avoids undesirable physical contact between the artificial lens and the natural lens, effectively preventing long-term mechanical friction and resolving the safety hazards commonly present in the prior art due to insufficient gaps.

[0048] In one embodiment of the present invention, the posterior surface 40 of the intraocular lens is a secondary aspherical surface, the eccentricity e of the aspherical surface of the posterior surface of the intraocular lens is greater than 0, and the sag Z of each point on the secondary aspherical surface satisfies the following formula (2). (2) Where x is the diameter of the artificial lens, e is the aspherical eccentricity, and c is the reciprocal of the vertex radius of curvature r, i.e., c = The intraocular lens that satisfies the above formula can closely match the inherent aspheric morphology of the anterior surface 50 of the natural lens of the human eye, solving the fundamental problem of poor matching between traditional spherical or simple aspherical lenses and the surface of the natural lens.

[0049] In one embodiment of the present invention, the posterior surface 40 of the artificial lens is a high-order aspherical surface, and the curvature CV of each point on the high-order aspherical surface satisfies the following formula (3). (3) Where x is the diameter of the artificial lens, Q is the aspheric coefficient, and Q = -e c is the reciprocal of the vertex radius of curvature r, A4, A6, A8 These are the coefficients of higher-order terms for aspherical surfaces, and the unit of measurement is meters (m).

[0050] The height Z satisfies the following formula (4); (4) Where x is the diameter of the artificial lens, Q is the aspheric coefficient, and Q = -e c is the reciprocal of the vertex radius of curvature r, A4, A6, A8 For aspherical higher-order terms, the coefficients are given.

[0051] In one embodiment of this invention, when the diameter of the aspherical surface is 9 mm, the radius of curvature at the apex of the optical part is greater than 20 mm. A vertex radius of curvature >20 mm significantly reduces the central sag of the lens, forming a uniform gap with the transparent lens within the 9 mm full optical zone, effectively avoiding lens contact due to insufficient arch height in the early and long term after surgery. Of course, in some embodiments, the posterior surface of the phakic intraocular lens can be selected as spherical.

[0052] In one embodiment of this utility model, the outer periphery of the support portion 20 is provided with multiple haptics 30. Through the elastic haptics arranged symmetrically at three or four points, a self-centering and self-locking dual mechanism can be formed with the ciliary sulcus at the moment of implantation, so that the offset between the center of the intraocular lens and the visual axis is small and the postoperative tilt angle is <2°. The multi-point dispersed radial support force reduces the local pressure, significantly reducing ischemia at the root of the iris and iris friction syndrome. In addition, the haptics 30 and the support portion 20 are integrally formed, which simplifies the structure of the intraocular lens, reduces the risk of long-term fatigue fracture, and improves the safety of lifelong use for patients.

[0053] In one embodiment of this utility model, four foot loops 30 are provided on the outer periphery of the support portion 20. The four foot loops 30 are arranged symmetrically in pairs, and the width of the foot loops 30 is 1.0-3.0 mm. Preferably, the width of the foot loops 30 is 1.5-2.5 mm. Specifically, as shown... Figure 1 As shown, two hoops 30 are provided on the left side of the support portion 20, and two hoops 30 are provided on the right side of the support portion 20. The two hoops 30 on the same side are symmetrically arranged vertically. Each hoop 30 is the same size and shape. The four points of symmetrical distribution form a cross-spring radial support, which automatically locks the optical center on the visual axis after implantation, resulting in small postoperative eccentricity and tilt angle. The vertically symmetrical hoops 30 ensure that the lens maintains uniform rebound when intraocular pressure fluctuates, with small axial displacement, avoiding periodic impact on the corneal endothelium.

[0054] In one embodiment of this utility model, such as Figure 2 As shown, the posterior arch height of the intraocular lens ( Figure 2 The L in the image is 1.0-2.0 mm, and the four haptics 30 are on the same plane. The distance between this plane and the vertex (center point) of the posterior surface of the optic is the posterior arch height of the intraocular lens. This value range provides a safe gap in the center and around the periphery without deepening the anterior chamber, ensuring the physiological cross-sectional area of ​​the aqueous humor circulation channel, maintaining normal drainage, and avoiding progressive damage caused by excessive arch height.

[0055] In one embodiment of the present invention, the rear surfaces of the optical part 10 and the support part 20 are both aspherical, and the curvature of the rear surfaces of the optical part 10 and the support part gradually decreases and continues from the center of the optical part 10 to the edge of the foot stalk 30.

[0056] In one embodiment of this invention, the diameter 70 of the intraocular lens is 10-15 mm. This 10-15 mm outer diameter matches the average diameter of the ciliary sulcus in adults, allowing the four haptics 30 to be stably fixed with minimal compression, ensuring minimal postoperative eccentricity and rotation. Preferably, the diameter 70 of the intraocular lens is 11.5-14.2 mm.

[0057] It should be noted that the diameter of the intraocular lens is 70, which is either the total diameter of the intraocular lens or the maximum diameter of the intraocular lens.

[0058] In one embodiment of this invention, the diameter of the optical part 10 is 5.0-7.0 mm, which precisely covers the entire effective optical zone of a normal photopic pupil (3-4 mm) and a scotopic pupil (6-7 mm), ensuring that central visual sharpness in high-brightness daytime environments and peripheral visual quality in low-light nighttime environments are simultaneously improved. Preferably, the diameter of the optical part 10 is 5.4-6.3 mm.

[0059] In one embodiment of this invention, the front surface of the optical part and the front surface of the support part 20 are connected by a smooth connecting section 60. This arrangement ensures that the surface of the phakic intraocular lens is rounded and smooth, resulting in less friction with the iris. Figure 3 As shown, the smooth transition section 60 eliminates any sharp angles or inflection points with a continuous and differentiated curvature gradient, which greatly reduces the peak pressure of the contact between the lens and the iris. In addition, the smooth transition section 60 eliminates the local stress concentration at the junction of the optical part 10 and the support part, and no cracks or deformations appeared in the swing fatigue test, ensuring long-term mechanical stability and comfortable wearing.

[0060] In one embodiment of this invention, the front surface of the smooth transition section 60 is aspherical. The curvature of the side of the front surface of the smooth transition section 60 near the optical part 10 is the same as the curvature of the front surface of the optical part, and the curvature of the side of the front surface of the smooth transition section 60 near the support part 20 is the same as the curvature of the front surface of the support part 20. The curvature of the front surface of the smooth transition section 60 is continuous. This arrangement achieves both a smooth transition between the optical part 10 and the support part 20 and continuous curvature of the rear surface. The aspherical transition completes curvature matching with an analytically continuous function within an extremely narrow region, eliminating the height difference caused by traditional step or arc transitions, thus reducing the peak contact pressure between the lens and the iris. By ensuring continuous curvature, additional prismatic effects are avoided in the light path in the transition area, ensuring that the MTF decrease is <5% across the entire optical region.

[0061] In one embodiment of this invention, the posterior surfaces of the intraocular lens 40 and the smooth connecting segment 60 are both spherical, with a curvature of 500-2000. This arrangement compresses the overall sagittal of the posterior surface within a certain range, ensuring that the minimum gap between the intraocular lens and the natural lens is always ≥1.2 mm, significantly reducing the risk of contact subcapsular cataract. The curvature range of 500-2000 m⁻¹ provides sufficient refractive contribution while avoiding a surge in aberrations caused by excessive bending. At the same time, the single spherical processing only requires one polishing to cover the optical part 10 and the smooth connecting segment 60, greatly reducing surface shape errors, improving mass production efficiency, and reducing costs.

[0062] In one embodiment of the present invention, the artificial lens is provided with holes, and the holes are provided to satisfy at least one of the following: the center of the optical part 10 is provided with a central hole with a diameter of 0.25-0.4mm, and at least one of the support part 20 and the foot haptic 30 is provided with a positioning hole with a diameter of 0.35-0.8mm.

[0063] In one embodiment of this utility model, an artificial lens is used for the correction of refractive errors, presbyopia, and refractive errors accompanied by vision problems in the human eye.

[0064] This utility model also provides a method for designing the surface shape of a phakic intraocular lens, the method being based on the phakic intraocular lens described in any of the above claims, including: Step S100: Measure the anterior surface morphology of the transparent lens of the human eye; Step S200: Based on the anterior surface morphology and the preset posterior arch height, confirm the surface shape of the posterior surface of the intraocular lens. The curvature of each position on the posterior surface of the intraocular lens should not be greater than the curvature of the corresponding position of the transparent lens. Step S300: Based on the curvature of the posterior surface of the intraocular lens and the optical power and aberrations required by the human eye, calculate the optical profile of the anterior surface optical part 10 of the intraocular lens. In step S400, the front surface of the optical part is connected to the front surface of the support part 20 through a smooth connecting section 60.

[0065] In a specific embodiment 1, this embodiment uses a zero-aberration phakic intraocular lens with a power of -10.0D for myopia correction. The total diameter of the intraocular lens is 13.0 mm, the diameter of the optical part 10 is 6.0 mm, the width of the haptic 30 is 1.0 mm, and the intraocular lens has a central aperture with a diameter of 0.37 mm and four positioning apertures. The posterior surface 40 and the anterior surface of the intraocular lens are aspherical.

[0066] Step S100: Measure the anterior surface morphology of the human eye's transparent lens. The data is shown in Table 1 below. Table 1

[0067] Step S200: The posterior arch height of the intraocular lens is 1.06 mm. Based on the anterior surface morphology and the preset posterior arch height, the surface shape of the posterior surface of the intraocular lens is confirmed. Through secondary aspherical construction, the diameter of the aspherical area is 11.0 mm (total diameter minus the width of two 30-foot haptics), the vertex radius of curvature is 10.0 mm, and the eccentricity is 3.0. Its curvature distribution from the center to the periphery is as follows... Figure 4 As shown. Within a diameter range of 5 mm, the aspherical scaling factor η = 1.24; within a diameter range of 11 mm, the aspherical scaling factor η = 1.93. The curvature at certain radii is shown in Table 2 below. The curvature at each location should not exceed the curvature of the corresponding location of the transparent lens. The aspherical surface shape is as follows... Figure 5 As shown.

[0068] Table 2

[0069] Step S300: Based on the curvature of the posterior surface of the intraocular lens, with an optical power of -10.0D, zero aberrations, a material refractive index of 1.50, and a central thickness of 0.15mm, the optical surface profile of the anterior surface optical portion 10 of the intraocular lens is calculated as follows: Figure 6 As shown.

[0070] S4: The front surface of the optical part obtained according to the above steps is connected to the front surface of the support part 20 through a smooth connecting section 60 to construct a crystalline intraocular lens. The front surface of the smooth connecting section 60 is aspherical with a starting curvature of 15.63, achieving a smooth connection between the optical part 10 and the support part 20. Figure 7 As shown, the curve of the aspherical scaling factor η of the back surface varies with radius r and satisfies the following formula (5). η=2.94E-3r 3 +4.65E-2r 2 +1.60E-3r+1 (5).

[0071] In a specific embodiment 2, a phakic intraocular lens with a power of 0.0D is used for presbyopia correction to extend the depth of field. The total diameter of the intraocular lens is 11.5 mm, the diameter of the optical part 10 is 6.0 mm, the width of the haptic 30 is 1.0 mm, and the intraocular lens has a central aperture with a diameter of 0.37 mm and four positioning apertures. The posterior surface is aspherical, and the anterior surface is aspherical.

[0072] The radius of curvature at the vertex of the rear surface is 19 mm, and the sagittal distribution is as follows: Figure 8As shown, the curvature distribution is as follows Figure 9 As shown, the curve of the aspherical scaling factor η of the back surface varies along the radius r and satisfies the following formula (6). η=6.50E-5r 3 +8.20E-3r 2 +5.60E-5r+1 (6).

[0073] In a specific embodiment 3, the intraocular lens has a power of +6.0D for hyperopia correction. The total diameter of the intraocular lens is 14.2mm, the diameter of the optical part 10 is 6.0mm, and the width of the haptic 30 is 2.0mm.

[0074] The radius of curvature at the vertex of the rear surface is 15 mm, and the sagittal distribution is as follows: Figure 10 As shown, the curvature distribution is as follows Figure 11 As shown, the curve of the aspherical scaling factor η of the back surface varies with radius r and satisfies the following formula (7). η=4.30E-4r 3 +1.90E-2r 2 +5.10E-4r+1 (7).

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A phakic intraocular lens, said intraocular lens being implanted into the anterior surface of a natural lens within the eye, characterized in that, It includes an optical part and a support part, the support part being disposed on the outer periphery of the optical part to form a flat-panel intraocular lens, the posterior surface of the intraocular lens being aspherical, and the curvature of the posterior surface of the intraocular lens gradually decreasing from the center of the intraocular lens to the periphery.

2. The phakic intraocular lens according to claim 1, characterized in that, The aspheric scaling factor η on the posterior surface of the intraocular lens is greater than 1, and the curve of η along the radius r of the intraocular lens satisfies the following formula (1), where the aspheric scaling factor η refers to the ratio of the central curvature to the peripheral curvature within a specific range; （1） Wherein, φ3=[1.9E-5,6.1E-2], φ2=[3.7E-3,1.5E-1], and φ1=[3.8E-5,7.5E-2].

3. The phakic intraocular lens according to claim 2, characterized in that, The diameter of the intraocular lens, the diameter or radius of curvature of the optical portion, and the diameter of the aspherical surface satisfy any combination of at least one or more of the following: The diameter of the artificial lens is 10-15 mm; The diameter of the optical component is 5.0-7.0 mm; The diameter of the aspherical surface is 7.0-14.2 mm; When the diameter of the aspherical surface is 9 mm, η > 1; The radius of curvature of the posterior surface of the intraocular lens at the apex of the optical part is greater than 6.0 mm; When the diameter of the aspherical surface is 9 mm, the radius of curvature of the apex of the optical part is greater than 20 mm.

4. The phakic intraocular lens according to any one of claims 1 to 3, characterized in that, The posterior surface of the intraocular lens is a secondary aspherical surface, the eccentricity e of the aspherical surface of the posterior surface of the intraocular lens is greater than 0, and the sag Z of each point on the secondary aspherical surface satisfies the following formula (2). （2） Where x is the diameter of the artificial lens, e is the eccentricity of the aspherical surface, and c is the reciprocal of the vertex radius of curvature r.

5. The phakic intraocular lens according to any one of claims 1 to 3, characterized in that, The posterior surface of the artificial lens is a high-order aspherical surface, and the curvature CV of each point on the high-order aspherical surface satisfies the following formula (3). （3） The height Z satisfies the following formula (4); (4) Where x is the diameter of the artificial lens, Q is the aspheric coefficient, and Q = -e c is the reciprocal of the vertex radius of curvature r, A4, A6, A8 For aspherical higher-order terms, the coefficients are given.

6. The phakic intraocular lens according to any one of claims 1 to 3, characterized in that, The outer periphery of the support is provided with multiple foot loops.

7. The phakic intraocular lens according to claim 6, characterized in that, The outer periphery of the support is provided with four foot loops, which are arranged symmetrically in pairs, and the width of the foot loops is 1.0-3.0mm.

8. The phakic intraocular lens according to claim 6, characterized in that, The posterior arch height of the intraocular lens is 1.0-2.0 mm.

9. The phakic intraocular lens according to claim 6, characterized in that, The rear surfaces of both the optical part and the support part are aspherical, and the curvature of the rear surfaces of the optical part and the support part gradually decreases and continues from the center of the optical part to the edge of the foot loop.

10. The phakic intraocular lens according to any one of claims 1 to 3, characterized in that, The front surface of the optical part is connected to the front surface of the support part by a smooth connecting section.

11. The phakic intraocular lens according to claim 10, characterized in that, The front surface of the smooth connecting segment is aspherical. The curvature of the front surface of the smooth connecting segment near the optical part is the same as the curvature of the front surface of the optical part. The curvature of the front surface of the smooth connecting segment near the support part is the same as the curvature of the front surface of the support part. The curvature of the front surface of the smooth connecting segment is continuous.

12. The phakic intraocular lens according to claim 10, characterized in that, The posterior surface of the intraocular lens and the posterior surface of the smooth connecting segment are both spherical, and the curvature of the sphere is 500-2000.

13. The phakic intraocular lens according to any one of claims 1 to 3, characterized in that, The intraocular lens has a hole, and the hole is provided to satisfy at least one of the following: The optical part has a central hole with a diameter of 0.25-0.4 mm. The outer periphery of the support is provided with a foot stalk, and at least one of the support and the foot stalk is provided with a positioning hole, the diameter of which is 0.35-0.8mm.

14. The phakic intraocular lens according to any one of claims 1 to 3, characterized in that, The artificial lens is used for the correction of refractive errors, presbyopia, and refractive errors accompanied by vision problems in the human eye.

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