Preparation method of refractive operation surface type optical equivalent device and optimal surface type obtaining method

Abstract

The invention discloses a manufacturing method of a refractive operation surface type optical equivalent device and an optimal surface type obtaining method, and belongs to the field of visual imaging and corneal refraction correction. The manufacturing method comprises the following steps: obtaining preoperative corneal surface type parameters of a patient before a refractive operation and a plurality of preset postoperative corneal surface type parameters corresponding to the refractive operation; for each postoperative corneal surface type parameter, an incident plane is constructed based on each postoperative corneal surface type parameter, an emergent plane is constructed based on a preoperative corneal surface type parameter, a series of corneal contact lenses composed of the incident planes and the emergent planes are constructed, and optical equivalent devices corresponding to each postoperative corneal surface type parameter are constructed based on the corneal contact lenses. By means of the method, the patient can directly experience and evaluate the visual effects of different corneal surface types after the operation before the operation, then the optimal corneal surface type parameters after the operation are screened out, the patient can experience the corneal surface type most suitable for the patient before the operation, and the consistency of the corneal refraction operation prediction result and the subjective feeling of the patient is improved.

Description

Technical Field

[0001] This invention belongs to the field of visual imaging and corneal refractive correction, and more specifically, relates to a method for preparing an optical equivalent device for refractive surgery facial profile and a method for obtaining the optimal facial profile. Background Technology

[0002] The cornea is a crucial optical component of the human eye, providing approximately 70% of the eye's total refractive power. Its morphological characteristics directly determine the quality of visual imaging. In the field of corneal refractive surgery, the anterior surface morphology of the cornea is typically described using an elliptical model, where the aspheric coefficient Q-value is a key parameter, reflecting the characteristic of corneal curvature changing from the center to the periphery. When the Q-value is zero, the cornea is a standard sphere; when the Q-value is negative, the radius of curvature at the corneal margin increases, and the marginal refractive power decreases; when the Q-value is positive, the radius of curvature at the corneal margin decreases, and the marginal refractive power increases. An ideal optical system requires perfectly converging incident light rays to a single point; however, a standard sphere (Q=0) exhibits spherical aberration due to excessive marginal refractive power, making perfect focusing impossible. To optimize optical performance, it is necessary to appropriately reduce the marginal refractive power, i.e., increase the radius of curvature at the margin, shifting the Q-value in the negative direction.

[0003] With the development of refractive surgery techniques, Q-value-guided personalized corneal refractive surgery has emerged. This technology effectively reduces surgically induced aberrations and improves postoperative visual quality by actively modulating the aspheric properties of the cornea while correcting refractive errors. Clinical studies have shown that Q-value-guided surgery has a significant advantage in improving patients' night vision compared to traditional surgery. However, although modern corneal refractive surgery has developed towards personalization and precision, there is still a lack of unified standards and universally accepted methods for determining the ideal postoperative facial profile. Currently, there are two main approaches: one is empirical estimation based on preoperative corneal morphology, which lacks objective theoretical basis and relies excessively on clinical experience; the other is calculation through optical eye models, but the accuracy of the calculation results is significantly limited due to the limitations of current measurement precision and the complexity of constructing personalized eye models.

[0004] It is evident that the common drawback of existing methods is that they cannot allow patients to experience the actual visual effects corresponding to different postoperative corneal shapes before surgery. Patients can only passively accept the preset corneal shape, which may lead to suboptimal postoperative visual quality, thereby affecting the visual adjustment effect of refractive surgery and making it difficult for patients to obtain the best corrective experience. Summary of the Invention

[0005] In view of the above-mentioned defects or improvement needs of the prior art, the present invention provides a method for preparing an optical equivalent device for refractive surgery and a method for obtaining the optimal facial shape, thereby solving the technical problem that patients can only passively accept a preset corneal shape in the prior art, resulting in suboptimal postoperative visual quality.

[0006] To achieve the above objectives, according to a first aspect of the present invention, a method for fabricating a refractive surgery facial optical equivalent device is provided, comprising: S11, obtain the preoperative corneal facial profile parameters of the patient before refractive surgery; S12, determine several preset postoperative corneal profile parameters corresponding to the refractive surgery; the preoperative corneal profile parameters and the postoperative corneal profile parameters include, but are not limited to, corneal thickness, corneal curvature and corneal aspheric coefficient; S13, for any postoperative corneal profile parameter, construct an incident surface based on the any postoperative corneal profile parameter, construct an exit surface based on the preoperative corneal profile parameter, construct a corneal contact lens composed of the incident surface and the exit surface, and construct an optical equivalent device corresponding to the any postoperative corneal profile parameter based on the corneal contact lens; the optical equivalent device includes, but is not limited to, a corneal contact lens, eyeglasses, and a spatial light modulator.

[0007] According to the above-mentioned method for fabricating a refractive surgery facial shape optical equivalent device, the step of constructing an incident surface based on any postoperative corneal facial shape parameter, constructing an exit surface based on the preoperative corneal facial shape parameter, and constructing a corneal contact lens composed of the incident surface and the exit surface specifically includes: A postoperative corneal model is constructed based on any of the postoperative corneal profile parameters; the profile parameters of the anterior surface of the postoperative cornea in the postoperative corneal model are the same as those of any of the postoperative corneal profile parameters. The postoperative corneal model is thickened so that the corneal thickness of the postoperative corneal model is the same as the corneal thickness of the patient before surgery, and the preoperative anterior corneal surface corresponding to the preoperative corneal facet parameters is marked in the postoperative corneal model; An incident surface is constructed based on the postoperative anterior corneal surface, and an exit surface is constructed based on the preoperative anterior corneal surface. A corneal contact lens is constructed by the incident surface and the exit surface.

[0008] According to the above-described method for fabricating a refractive surgical facial optical equivalent device, the process of constructing the corneal contact lens consisting of the incident surface and the exit surface further includes: Determine the defocus distance caused by optical frontal shift after thickening the corneal model postoperatively; Based on the defocus distance and the patient's corneal refractive index, the surface profile parameters of the incident surface of the corneal contact lens are compensated for defocus using the lens power calculation formula.

[0009] According to the above-mentioned method for preparing a refractive surgery facial optical equivalent device, the step of performing defocus compensation on the facial parameters of the incident surface of the corneal contact lens based on the defocus distance and the patient's corneal refractive index, using the lens power calculation formula, specifically includes: The corneal curvature of the incident surface after defocus compensation is calculated using the following formula:

[0010] in, and These are the corneal curvatures of the incident surface before and after defocus compensation, respectively. The defocus distance is denoted as n, and the corneal refractive index of the patient is denoted as n.

[0011] According to the above-described method for fabricating an optical equivalent device for refractive surgery facial profile, when the optical equivalent device is a spectacle or a spatial light modulator, the step of constructing an optical equivalent device corresponding to any postoperative corneal facial profile parameter based on the corneal contact lens includes: Acquire the wavefront distribution of light propagating from the incident surface of the corneal contact lens to the exit surface of the corneal contact lens; The equivalent module parameters of the optical equivalent device are determined based on the wavefront distribution of light propagating from the incident surface of the corneal contact lens to the exit surface of the corneal contact lens, so that the wavefront distribution of light reaching the preoperative anterior corneal surface of the patient after passing through the optical equivalent device is the same as the wavefront distribution of light propagating from the incident surface of the corneal contact lens to the exit surface of the corneal contact lens.

[0012] According to the above-mentioned method for preparing a refractive surgery facial optical equivalent device, when the optical equivalent device is a pair of eyeglasses, the equivalent module parameters of the optical equivalent device include, but are not limited to, lens radius of curvature, thickness, refractive index, and aspheric coefficient. The determination of the equivalent module parameters of the optical equivalent device based on the wavefront distribution of light propagating from the incident surface of the corneal contact lens to the exit surface of the corneal contact lens, such that the wavefront distribution of light reaching the patient's preoperative anterior corneal surface after passing through the optical equivalent device is the same as the wavefront distribution of light propagating from the incident surface of the corneal contact lens to the exit surface of the corneal contact lens, includes: S31, Given the initial equivalent module parameters of the optical equivalent device; S32, based on the current equivalent module parameters, calculate the wavefront distribution of light reaching the preoperative anterior corneal surface of the patient after passing through the optical equivalent device under the current equivalent module parameters; S33, calculate the wavefront difference between the wavefront distribution of light reaching the preoperative anterior corneal surface of the patient through the optical equivalent device under the current equivalent module parameters and the wavefront distribution of light propagating from the incident surface of the corneal contact lens to the exit surface of the corneal contact lens. S34, when the wavefront difference does not reach the optimization target, update the equivalent module parameters of the optical equivalent device and jump to step S32; when the wavefront difference reaches the optimization target, determine the current equivalent module parameters as the final equivalent module parameters of the optical equivalent device.

[0013] According to the above-mentioned method for preparing a refractive surgery facial optical equivalent device, when the optical equivalent device is a spatial light modulator, the equivalent module parameters of the optical equivalent device include the phase map of the hologram loaded on the optical equivalent device; The determination of the equivalent module parameters of the optical equivalent device based on the wavefront distribution of light propagating from the incident surface of the corneal contact lens to the exit surface of the corneal contact lens, such that the wavefront distribution of light reaching the patient's preoperative anterior corneal surface after passing through the optical equivalent device is the same as the wavefront distribution of light propagating from the incident surface of the corneal contact lens to the exit surface of the corneal contact lens, includes: The wavefront distribution of light propagating from the incident surface of the corneal contact lens to the exit surface of the corneal contact lens is expanded using Zernike coefficients to obtain the Zernike coefficients corresponding to the wavefront distribution. The phase diagram of the hologram loaded by the optical equivalent device is obtained by multiplying each Zernike coefficient by the corresponding basic phase diagram and then summing them.

[0014] According to a second aspect of the present invention, an optical equivalent device for refractive surgery facial profile is provided, which is prepared based on the method described in the first aspect.

[0015] According to a third aspect of the present invention, an optimal surface shape acquisition method is provided, comprising: S91, for different postoperative corneal profile parameters, obtain the optical equivalent device corresponding to each postoperative corneal profile parameter; wherein, the optical equivalent device corresponding to any postoperative corneal profile parameter is prepared based on the refractive surgery profile optical equivalent device preparation method provided in the first aspect; S92, couple the patient's eye with the optical equivalent device corresponding to each postoperative corneal shape parameter, and obtain the visual test results obtained by the patient after performing a visual test through the optical equivalent device corresponding to each postoperative corneal shape parameter. S93, based on the visual test results obtained after the patient has undergone visual testing using optical equivalent devices corresponding to each postoperative corneal facial shape parameter, the postoperative corneal facial shape parameter with the best visual test result is determined as the optimal facial shape for the patient's refractive surgery.

[0016] According to a fourth aspect of the present invention, an optimal surface shape acquisition device is provided, comprising: An optical equivalent device acquisition unit is used to acquire optical equivalent devices corresponding to different postoperative corneal profile parameters; wherein, the optical equivalent device corresponding to any postoperative corneal profile parameter is prepared based on the refractive surgery profile optical equivalent device preparation method provided in the first aspect; The visual assessment unit is used to couple the patient's eyes with the optical equivalent device corresponding to each postoperative corneal profile parameter, and to obtain the visual test results obtained by the patient after performing visual tests through the optical equivalent device corresponding to each postoperative corneal profile parameter. The optimal facial profile determination unit is used to determine the optimal postoperative corneal facial profile parameters based on the visual test results obtained after the patient has undergone visual testing using optical equivalent devices corresponding to each postoperative corneal facial profile parameter, and to use these parameters as the optimal facial profile for the patient's refractive surgery.

[0017] In summary, the method for fabricating an optically equivalent device for refractive surgery facial profile and the method for obtaining the optimal facial profile provided by this invention obtains the preoperative corneal facial profile parameters of the patient before refractive surgery and several preset postoperative corneal facial profile parameters corresponding to the refractive surgery. For each postoperative corneal facial profile parameter, an incident surface is constructed based on each postoperative corneal facial profile parameter, and an exit surface is constructed based on the preoperative corneal facial profile parameters. A series of corneal contact lenses composed of the aforementioned incident and exit surfaces are constructed. Based on these corneal contact lenses, an optically equivalent device corresponding to each postoperative corneal facial profile parameter is constructed, enabling the patient to... After the eye is coupled with the optical equivalent device corresponding to each postoperative corneal profile parameter, the optical appearance on the anterior corneal surface of the patient's eye is consistent with the optical appearance on the anterior corneal surface of the patient's eye after refractive surgery corresponding to each postoperative corneal profile parameter. This allows the patient to directly experience and evaluate the visual effect of different postoperative corneal profiles before surgery, and then select the best postoperative corneal profile parameters. This allows the patient to personally experience and decide on the most suitable corneal profile before surgery, improving the consistency between the predicted results of corneal refractive surgery and the patient's subjective experience. Attached Figure Description

[0018] Figure 1 A schematic flowchart illustrating the fabrication method of the refractive surgery facial optical equivalent device provided in an embodiment of the present invention; Figure 2 A schematic diagram of the human eye structure provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the optical equivalent device provided in an embodiment of the present invention; Figure 4 A schematic flowchart illustrating the constraint method for a first type of optical equivalent device provided in an embodiment of the present invention; Figure 5 A schematic flowchart illustrating the constraint method for the second type of optical equivalent device provided in an embodiment of the present invention; Figure 6 A flowchart illustrating the optimal face shape acquisition method provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the optimal surface shape acquisition device provided in an embodiment of the present invention. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0020] This invention provides a method for fabricating a refractive surgery facial optical equivalent device, such as... Figure 1 As shown, it includes: S11, obtain the preoperative corneal facial profile parameters of the patient before refractive surgery; S12, determine several preset postoperative corneal profile parameters corresponding to the refractive surgery; the preoperative corneal profile parameters and the postoperative corneal profile parameters include, but are not limited to, corneal thickness, corneal curvature and corneal aspheric coefficient; S13, for any postoperative corneal profile parameter, construct an incident surface based on the any postoperative corneal profile parameter, construct an exit surface based on the preoperative corneal profile parameter, construct a corneal contact lens composed of the incident surface and the exit surface, and construct an optical equivalent device corresponding to the any postoperative corneal profile parameter based on the corneal contact lens; the optical equivalent device includes, but is not limited to, a corneal contact lens, eyeglasses, and a spatial light modulator.

[0021] Here, for specific patients, preoperative corneal facial features can be obtained using equipment such as corneal topography and optical coherence tomography. These preoperative corneal facial features include, but are not limited to, corneal thickness, corneal curvature, and corneal aspheric coefficient.

[0022] Based on the patient's current refractive status and surgical goals, several postoperative corneal profile parameters can be selected from a range of preset parameters to correspond with the patient's refractive surgery. Similar to preoperative corneal profile parameters, postoperative corneal profile parameters include, but are not limited to, corneal thickness, corneal curvature, and corneal aspheric coefficient.

[0023] To allow the patient to experience the optical performance of different surgical approaches (corresponding to different postoperative corneal profile parameters) preoperatively, corresponding optical equivalent devices can be constructed for different postoperative corneal profile parameters. It is ensured that the optical performance on the anterior corneal surface of the patient's eye after coupling with the optical equivalent device corresponding to any postoperative corneal profile parameter is consistent with the optical performance on the anterior corneal surface of the patient's eye after undergoing refractive surgery corresponding to that corneal profile parameter. This optical performance includes, but is not limited to, various optical evaluation indicators such as aberrations and MTF (Modulation Transfer Function).

[0024] Specifically, such as Figure 2 As shown, before surgery, the three optically functional structures of the patient's eye mainly include the anterior corneal surface 35, the posterior corneal surface 32, the lens 33, the retina 34, the aqueous humor between the posterior corneal surface 32 and the lens 33, and the vitreous humor between the lens 33 and the retina 34. After refractive surgery, the anterior corneal surface will have a new shape. Apart from this, the optical effects of the posterior corneal surface 32, the lens 33, the retina 34, the aqueous humor, and the lens remain essentially unchanged.

[0025] To construct an optically equivalent device corresponding to the postoperative corneal facial profile parameters, such as Figure 3 As shown, an incident surface can be constructed based on the postoperative corneal profile parameters (postoperative anterior corneal surface 31), and an exit surface can be constructed based on the patient's preoperative corneal profile parameters (preoperative anterior corneal surface 35). A corneal contact lens composed of this incident surface and the exit surface is then constructed. For this corneal contact lens, when light enters the lens through the incident surface representing the postoperative anterior corneal surface and then through the exit surface representing the patient's preoperative anterior corneal surface, its optical path is consistent with the actual postoperative corneal light-guiding path. Therefore, it can be ensured that the optical performance on the patient's anterior corneal surface after coupling with the corneal contact lens is consistent with the optical performance on the patient's anterior corneal surface after refractive surgery corresponding to the postoperative corneal profile parameters. Therefore, based on this corneal contact lens, on the one hand, the corneal contact lens can be directly used as the optical equivalent device corresponding to the postoperative corneal facial profile parameters. The corneal contact lens can be placed on the surface of the patient's cornea so that the patient can experience the optical performance of the postoperative corneal facial profile parameters. On the other hand, in order to facilitate patient wear, the corneal contact lens can also be converted into eyeglasses with the same optical performance or other optical components such as a spatial light modulator loaded with a hologram, which can also serve as the optical equivalent device corresponding to the postoperative corneal facial profile parameters.

[0026] In some embodiments, to construct a corneal contact lens corresponding to any postoperative corneal profile parameter, a postoperative corneal model including the postoperative anterior and posterior corneal surfaces can be constructed based on the postoperative corneal profile parameter. The profile parameters of the postoperative anterior corneal surface in this model are the same as the postoperative corneal profile parameter. Considering that refractive surgery leads to corneal thinning, to simulate the patient's preoperative corneal anterior surface, the postoperative corneal model needs to be thickened so that the thickness of the thickened model is the same as the patient's preoperative corneal thickness. The preoperative corneal anterior surface corresponding to the preoperative corneal profile parameter is marked in the thickened model. Subsequently, an incident surface is constructed based on the aforementioned postoperative anterior corneal surface, and an exit surface is constructed based on the aforementioned preoperative anterior corneal surface. The corneal contact lens formed by the incident and exit surfaces is then constructed.

[0027] Based on this, because the postoperative corneal model was thickened during the construction of the corneal contact lens, this thickening operation will cause the optical face to shift, thus introducing defocusing phenomena, such as... Figure 3 As shown. Among them, Figure 3 The solid line depicts the postoperative anterior corneal surface after thickening, while the dashed line depicts the postoperative anterior corneal surface before thickening. Under a refractive index n, there is a deviation between the focal plane of light rays after passing through the dashed line and the focal plane of light rays after passing through the solid line. This deviation is the defocus distance Δd. To compensate for the optical performance deviation caused by this defocusing phenomenon, and to ensure that the optical performance of light passing through the corneal contact lens to the patient's preoperative corneal anterior surface is equivalent to the optical performance of light directly passing through the patient's postoperative corneal anterior surface, the defocus distance caused by the forward shift of the optical surface after thickening the corneal model can be determined. Based on this defocus distance and the patient's corneal refractive index, the optical power calculation formula of the lens is used to perform defocus compensation on the surface profile parameters of the incident surface of the corneal contact lens, so that the point of light falling on any plane after passing through the defocus-compensated incident surface is consistent with the point of light falling on the same plane after passing through the postoperative corneal anterior surface of the cornea before and after thickening.

[0028] In other embodiments, the corneal curvature of the incident surface after defocus compensation can be calculated based on the following formula: (1) in, and These are the corneal curvatures of the incident surface before and after defocus compensation, respectively. denoted as defocus distance, and n as the corneal refractive index of the patient.

[0029] Formula (1) is derived based on the following formula for calculating optical power:

[0030] Among them, EFL1 is the effective focal length of the postoperative corneal profile. To compensate for the optical power of the corneal facet shape before and after defocusing. To compensate for the optical power of the corneal surface after defocusing.

[0031] To facilitate patient wear, the corneal contact lens with the above-described structure can be converted into eyeglasses with the same optical performance or a spatial light modulator loaded with a hologram, serving as the optical equivalent device corresponding to the postoperative corneal facial profile parameters.

[0032] In some embodiments, when the optical equivalent device is in the form of eyeglasses or a spatial light modulator, the wavefront distribution W1 of light propagating from the incident surface to the exit surface of the contact lens is obtained based on the aforementioned structure. Subsequently, the equivalent module parameters of the eyeglasses or spatial light modulator are determined based on the wavefront distribution of light propagating from the incident surface to the exit surface of the contact lens, such that the wavefront distribution W2 of light reaching the patient's preoperative anterior corneal surface after passing through the eyeglasses or spatial light modulator is the same as the wavefront distribution W1 of light propagating from the incident surface to the exit surface of the contact lens. Wherein, when the optical equivalent device is eyeglasses, the equivalent module parameters include, but are not limited to, lens radius of curvature, thickness, refractive index, and aspherical coefficient; when the optical equivalent device is a spatial light modulator, the equivalent module parameters include the phase map of the hologram loaded by the optical equivalent device.

[0033] In other embodiments, when the optical equivalent is eyeglasses, such as Figure 4 As shown, in order to ensure that the wavefront distribution W2 of light reaching the patient's preoperative anterior corneal surface after passing through this optical equivalent device is the same as the wavefront distribution W1 of light propagating from the incident surface of the corneal contact lens to the exit surface of the corneal contact lens, the following constraint method can be implemented: S31, Given the initial equivalent module parameters of the optical equivalent device; wherein, the initial equivalent module parameters can be given empirically, or set as a plano-convex / plano-concave thin lens matching the patient's refractive power; S32, based on the current equivalent module parameters, calculate the wavefront distribution of light reaching the preoperative anterior corneal surface of the patient after passing through the optical equivalent device under the current equivalent module parameters; in the first iteration, the current equivalent module parameters are the initial equivalent module parameters, and in other iterations, the current equivalent module parameters are the equivalent module parameters obtained by the last update in the previous iteration. S33, calculate the wavefront difference between the wavefront distribution W2 of light reaching the patient's preoperative anterior corneal surface through the optical equivalent device under the current equivalent module parameters and the wavefront distribution W1 of light propagating from the incident surface of the corneal contact lens to the exit surface of the corneal contact lens. S34, when the wavefront difference does not reach the preset optimization target, update the equivalent module parameters of the optical equivalent device and jump to step S32; when the wavefront difference reaches the optimization target, determine the current equivalent module parameters as the final equivalent module parameters of the optical equivalent device.

[0034] Through the above optimization method, the optimized equivalent module parameters can satisfy the condition that the wavefront distribution W2 of light reaching the patient's preoperative corneal anterior surface after passing through the optical equivalent device is the same as the wavefront distribution W1 of light propagating from the incident surface of the corneal contact lens to the exit surface of the corneal contact lens.

[0035] In some embodiments, when the optical equivalent device is a spatial light modulator, such as Figure 5 As shown, in order to ensure that the wavefront distribution W2 of light reaching the patient's preoperative anterior corneal surface after passing through this optical equivalent device is the same as the wavefront distribution W1 of light propagating from the incident surface of the corneal contact lens to the exit surface of the corneal contact lens, the following constraint method can be implemented: The wavefront distribution W1 of light propagating from the incident surface of the corneal contact lens to the exit surface of the corneal contact lens is expanded using Zernike coefficients to obtain the corresponding Zernike coefficients for each wavefront distribution. By multiplying each Zernike coefficient by its corresponding basic phase map and summing the results, the phase map of the hologram loaded by the optical equivalent device is obtained.

[0036] By using the above optimization method, when the hologram corresponding to the phase map is loaded onto the spatial light modulator, the wavefront distribution W2 of the light reaching the patient's preoperative corneal anterior surface through the optical equivalent device is the same as the wavefront distribution W1 of the light propagating from the incident surface of the corneal contact lens to the exit surface of the corneal contact lens.

[0037] In summary, the optical equivalent device fabrication method provided by the embodiments of the present invention obtains the preoperative corneal profile parameters of the patient before refractive surgery and several preset postoperative corneal profile parameters corresponding to the refractive surgery. For each postoperative corneal profile parameter, an incident surface is constructed based on each postoperative corneal profile parameter, and an exit surface is constructed based on the preoperative corneal profile parameters. A series of corneal contact lenses composed of the above-mentioned incident and exit surfaces are constructed. Based on the corneal contact lenses, optical equivalent devices corresponding to each postoperative corneal profile parameter are constructed. After the patient's eye is coupled with the optical equivalent devices corresponding to each postoperative corneal profile parameter, the optical performance presented on the anterior surface of the patient's eye's cornea is consistent with the optical performance presented on the anterior surface of the patient's eye's cornea after refractive surgery corresponding to each postoperative corneal profile parameter. This allows the patient to directly experience and evaluate the visual effects of different postoperative corneal profiles before surgery.

[0038] Accordingly, embodiments of the present invention also provide an optical equivalent device for refractive surgery facial features, which is prepared based on a method for preparing an optical equivalent device for refractive surgery facial features.

[0039] Accordingly, embodiments of the present invention also provide a method for obtaining the optimal facial profile for refractive surgery. Figure 6 This is a flowchart illustrating the optimal face shape acquisition method provided by the present invention, as shown below. Figure 6 As shown, the method includes: S91, for different postoperative corneal profile parameters, obtain the optical equivalent device corresponding to each postoperative corneal profile parameter; wherein, the optical equivalent device corresponding to any postoperative corneal profile parameter is prepared based on any of the refractive surgery profile optical equivalent device preparation methods provided in the above embodiments. S92, couple the patient's eye with the optical equivalent device corresponding to each postoperative corneal shape parameter, and obtain the visual test results obtained by the patient after performing a visual test through the optical equivalent device corresponding to each postoperative corneal shape parameter. S93, based on the visual test results obtained after the patient has undergone visual testing using optical equivalent devices corresponding to each postoperative corneal facial shape parameter, the postoperative corneal facial shape parameter with the best visual test result is determined as the optimal facial shape for the patient's refractive surgery.

[0040] Specifically, optical equivalent devices corresponding to various postoperative corneal facial profile parameters are prepared using the above-described method, and the patient's eye is coupled to these devices. The optical equivalent devices prepared in this way ensure that the optical appearance on the anterior corneal surface of the patient's eye is consistent with the optical appearance on the anterior corneal surface of the patient's eye after refractive surgery corresponding to each postoperative corneal facial profile parameter. Therefore, the patient can directly experience and evaluate the visual effects of different postoperative corneal facial profiles before surgery. The patient's eye is coupled to the optical equivalent devices corresponding to each postoperative corneal facial profile parameter, and the visual test results obtained after the patient performs visual tests using these devices are obtained. The visual test methods include, but are not limited to, commonly accepted ophthalmological methods, such as visual acuity chart-based visual test procedures. Based on the visual test results obtained after the patient performs visual tests using the optical equivalent devices corresponding to each postoperative corneal facial profile parameter, the postoperative corneal facial profile parameter with the best visual test result is determined as the optimal facial profile for the patient's corresponding refractive surgery. In addition, the most suitable postoperative corneal facial profile parameters can be determined by combining the patient's subjective feelings with the objective visual test results.

[0041] The optimal corneal shape acquisition method provided in this invention couples the patient's eye with an optical equivalent device corresponding to each postoperative corneal shape parameter. This allows the acquisition of the patient's visual test results obtained after visual testing using this device. Based on these results, the optimal postoperative corneal shape parameters are determined, enabling the patient to personally experience and determine the most suitable corneal shape before surgery. This addresses the previous limitation where patients were forced to accept a fixed and potentially unsuitable corneal shape after surgery, improving the consistency between the predicted results of corneal refractive surgery and the patient's subjective experience.

[0042] Accordingly, embodiments of the present invention also provide an optimal facial profile acquisition device for refractive surgery. Figure 7 This is a schematic diagram of the structure of the optimal face shape acquisition device provided by the present invention, as shown below. Figure 7 As shown, the device includes: The optical equivalent device acquisition unit 710 is used to acquire the optical equivalent device corresponding to each postoperative corneal profile parameter for different postoperative corneal profile parameters; wherein, the optical equivalent device corresponding to any postoperative corneal profile parameter is prepared based on the refractive surgery profile optical equivalent device preparation method described in any one of claims 1 to 7. The visual assessment unit 720 is used to couple the patient's eye with an optical equivalent device corresponding to each postoperative corneal profile parameter, and to obtain the visual test results obtained by the patient after performing a visual test through the optical equivalent device corresponding to each postoperative corneal profile parameter. The optimal facial shape determination unit 730 is used to determine the optimal postoperative corneal facial shape parameters based on the visual test results obtained after the patient has undergone visual testing using optical equivalent devices corresponding to each postoperative corneal facial shape parameter, and to use these parameters as the optimal facial shape for the patient's refractive surgery.

[0043] The optimal corneal shape acquisition device provided in this invention couples the patient's eye with an optical equivalent device corresponding to each postoperative corneal shape parameter. It then acquires the visual test results obtained by the patient after visual testing using this optical equivalent device. Based on these results, the optimal postoperative corneal shape parameters are determined, allowing the patient to personally experience and determine the most suitable corneal shape before surgery. This addresses the previous limitation where patients were forced to accept a fixed and potentially unsuitable corneal shape after surgery, improving the consistency between the predicted results of corneal refractive surgery and the patient's subjective experience.

[0044] This invention provides an electronic device, including: a computer-readable storage medium and a processor; The computer-readable storage medium is used to store executable instructions; The processor is configured to read executable instructions stored in the computer-readable storage medium and execute the method as described in any of the above embodiments.

[0045] This invention provides a computer-readable storage medium storing computer instructions that cause a processor to perform the method described in any of the above embodiments.

[0046] This invention provides a computer program product, including a computer program or instructions, which, when executed by a processor, implement the method described in any of the above embodiments.

[0047] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method of manufacturing an optical equivalent of a refractive surgery topography, characterized in that, include: S11, obtain the preoperative corneal facial profile parameters of the patient before refractive surgery; S12, determine several preset postoperative corneal profile parameters corresponding to the refractive surgery; the preoperative corneal profile parameters and the postoperative corneal profile parameters include, but are not limited to, corneal thickness, corneal curvature and corneal aspheric coefficient; S13, for any postoperative corneal profile parameter, construct an incident surface based on the any postoperative corneal profile parameter, construct an exit surface based on the preoperative corneal profile parameter, construct a corneal contact lens composed of the incident surface and the exit surface, and construct an optical equivalent device corresponding to the any postoperative corneal profile parameter based on the corneal contact lens; the optical equivalent device includes, but is not limited to, a corneal contact lens, eyeglasses, and a spatial light modulator.

2. The method for fabricating the refractive surgery facial optical equivalent device as described in claim 1, characterized in that, The method of constructing a corneal contact lens based on any postoperative corneal profile parameter, constructing an incident surface based on the preoperative corneal profile parameter, and constructing a contact lens consisting of the incident surface and the exit surface, specifically includes: A postoperative corneal model is constructed based on any of the postoperative corneal profile parameters; the profile parameters of the anterior surface of the postoperative cornea in the postoperative corneal model are the same as those of any of the postoperative corneal profile parameters. The postoperative corneal model is thickened so that the corneal thickness of the postoperative corneal model is the same as the corneal thickness of the patient before surgery, and the preoperative anterior corneal surface corresponding to the preoperative corneal facet parameters is marked in the postoperative corneal model; An incident surface is constructed based on the postoperative anterior corneal surface, and an exit surface is constructed based on the preoperative anterior corneal surface. A corneal contact lens is constructed by the incident surface and the exit surface.

3. The method for fabricating the refractive surgery facial optical equivalent device as described in claim 2, characterized in that, The corneal contact lens, which is constructed by the incident surface and the exit surface, further includes: Determine the defocus distance caused by optical frontal shift after thickening the corneal model postoperatively; Based on the defocus distance and the patient's corneal refractive index, the surface profile parameters of the incident surface of the corneal contact lens are compensated for defocus using the lens power calculation formula.

4. The method for fabricating the refractive surgery facial optical equivalent device as described in claim 3, characterized in that, The defocus compensation for the incident surface parameters of the corneal contact lens, based on the defocus distance and the patient's corneal refractive index, is performed using the lens power calculation formula. Specifically, this includes: The corneal curvature of the incident surface after defocus compensation is calculated using the following formula: wherein, and Rcand Rcorrespond to the corneal curvature of the entrance surface after and before the defocus compensation, respectively, is the defocus distance and n is the corneal refractive index of the patient.

5. The method for fabricating the refractive surgery facial optical equivalent device according to any one of claims 1 to 4, characterized in that, When the optical equivalent device is a spectacle or a spatial light modulator, the construction of the optical equivalent device corresponding to any postoperative corneal profile parameter based on the corneal contact lens includes: Acquire the wavefront distribution of light propagating from the incident surface of the corneal contact lens to the exit surface of the corneal contact lens; The equivalent module parameters of the optical equivalent device are determined based on the wavefront distribution of light propagating from the incident surface of the corneal contact lens to the exit surface of the corneal contact lens, so that the wavefront distribution of light reaching the preoperative anterior corneal surface of the patient after passing through the optical equivalent device is the same as the wavefront distribution of light propagating from the incident surface of the corneal contact lens to the exit surface of the corneal contact lens.

6. The method for fabricating the refractive surgery facial optical equivalent device as described in claim 5, characterized in that, When the optical equivalent device is a pair of eyeglasses, the equivalent module parameters of the optical equivalent device include, but are not limited to, the lens radius of curvature, thickness, refractive index, and aspheric coefficient. The determination of the equivalent module parameters of the optical equivalent device based on the wavefront distribution of light propagating from the incident surface of the corneal contact lens to the exit surface of the corneal contact lens, such that the wavefront distribution of light reaching the patient's preoperative anterior corneal surface after passing through the optical equivalent device is the same as the wavefront distribution of light propagating from the incident surface of the corneal contact lens to the exit surface of the corneal contact lens, includes: S31, Given the initial equivalent module parameters of the optical equivalent device; S32, based on the current equivalent module parameters, calculate the wavefront distribution of light reaching the preoperative anterior corneal surface of the patient after passing through the optical equivalent device under the current equivalent module parameters; S33, calculate the wavefront difference between the wavefront distribution of light reaching the preoperative anterior corneal surface of the patient through the optical equivalent device under the current equivalent module parameters and the wavefront distribution of light propagating from the incident surface of the corneal contact lens to the exit surface of the corneal contact lens. S34, when the wavefront difference does not reach the optimization target, update the equivalent module parameters of the optical equivalent device and jump to step S32; when the wavefront difference reaches the optimization target, determine the current equivalent module parameters as the final equivalent module parameters of the optical equivalent device.

7. The method for fabricating the refractive surgery facial optical equivalent device as described in claim 5, characterized in that, When the optical equivalent device is a spatial light modulator, the equivalent module parameters of the optical equivalent device include the phase map of the hologram loaded by the optical equivalent device; The determination of the equivalent module parameters of the optical equivalent device based on the wavefront distribution of light propagating from the incident surface of the corneal contact lens to the exit surface of the corneal contact lens, such that the wavefront distribution of light reaching the patient's preoperative anterior corneal surface after passing through the optical equivalent device is the same as the wavefront distribution of light propagating from the incident surface of the corneal contact lens to the exit surface of the corneal contact lens, includes: The wavefront distribution of light propagating from the incident surface of the corneal contact lens to the exit surface of the corneal contact lens is expanded using Zernike coefficients to obtain the Zernike coefficients corresponding to the wavefront distribution. The phase diagram of the hologram loaded by the optical equivalent device is obtained by multiplying each Zernike coefficient by the corresponding basic phase diagram and then summing them.

8. An optical equivalent device for refractive surgery facial contouring, characterized in that, The optical equivalent device is prepared based on the method for preparing a refractive surgical facial optical equivalent device according to any one of claims 1 to 7.

9. A method for obtaining an optimal face shape, characterized in that, include: S91, for different postoperative corneal profile parameters, obtain the optical equivalent device corresponding to each postoperative corneal profile parameter; wherein, the optical equivalent device corresponding to any postoperative corneal profile parameter is prepared based on the refractive surgery profile optical equivalent device preparation method described in any one of claims 1 to 7. S92, couple the patient's eye with the optical equivalent device corresponding to each postoperative corneal shape parameter, and obtain the visual test results obtained by the patient after performing a visual test through the optical equivalent device corresponding to each postoperative corneal shape parameter. S93, based on the visual test results obtained after the patient has undergone visual testing using optical equivalent devices corresponding to each postoperative corneal facial shape parameter, the postoperative corneal facial shape parameter with the best visual test result is determined as the optimal facial shape for the patient's refractive surgery.

10. An optimal surface shape acquisition device, characterized in that, include: An optical equivalent device acquisition unit is used to acquire optical equivalent devices corresponding to different postoperative corneal profile parameters; wherein, the optical equivalent device corresponding to any postoperative corneal profile parameter is prepared based on the refractive surgery profile optical equivalent device preparation method described in any one of claims 1 to 7. The visual assessment unit is used to couple the patient's eyes with the optical equivalent device corresponding to each postoperative corneal profile parameter, and to obtain the visual test results obtained by the patient after performing visual tests through the optical equivalent device corresponding to each postoperative corneal profile parameter. The optimal facial profile determination unit is used to determine the optimal postoperative corneal facial profile parameters based on the visual test results obtained after the patient has undergone visual testing using optical equivalent devices corresponding to each postoperative corneal facial profile parameter, and to use these parameters as the optimal facial profile for the patient's refractive surgery.

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