WO2019178862A1 - Lens complying with retina resolution ratio, and fitting prescription and manufacturing method therefor - Google Patents

Abstract

A fitting prescription for a lens complying with the retina resolution ratio, comprising first measuring optical characteristics of a patient (2) and transmitting the optical characteristics to a computer, conducting design by using an optical aided design module, conducting evaluation by using an optical analysis module, introducing database retrieval, conducting simulation by an optical simulation system, and finally performing conversion to obtain a design format conforming to mechanical production and manufacturing a lens by using a 3D printer or a cutting system of a numerically-controlled machine tool. Also disclosed is a lens complying with the retina resolution ratio, and a manufacturing method therefor. According to the fitting prescription, design for a lens complying with the retina resolution ratio can be obtained by controlling precision in measurement and correction; by establishing a database for personalized customization, design parameters for the glasses are optimized according to age and career factors of different patients, so that fitting and manufacturing for a lens can be seamlessly integrated, information is communicated therebetween, the tolerance is smaller, the glasses can significantly improve the eyesight, and the discomfort on the eyes caused by wearing the glasses is reduced.

Description

Lens conforming to retina resolution and its fitting prescription and manufacturing method Technical field

The invention belongs to the technical field of fitting and manufacturing of lenses, in particular to a lens conforming to retina resolution and a fitting prescription and a manufacturing method thereof.

Background technique

The prescription for prescription, that is, the prescription for optometry and the prescription for glasses, refers to the treatment method and final conclusion of the optometry and optician process.

Ordinary routine optometry refers to the optician optometry in general optical shops. Its purpose is only to let the ametropia see the object, and the operation methods and steps are relatively simple. Medical optometry must first have a high-precision, high-cost comprehensive refractometer, and strict requirements for optometrists, must be eye optometry physicians who are familiar with clinical ophthalmology and optometry. Medical optometry is generally tested by the trial frame. According to the patient's response, the physician makes corresponding adjustments to obtain the most suitable prescription for the patient. If there is a patient with implicit oblique and external oblique, the optometry physician will adjust the prescription of the prescription as appropriate. . This optometry prescription not only makes the patient comfortable to wear, sees clearly, but also provides long-lasting reading and work.

After getting an accurate prescription for optometry, if the glasses are not properly matched, then the previous work is abandoned. To be equipped with an accurate pair of glasses, not only sophisticated equipment, but also optical expertise and technology. First, select a suitable frame and lens based on the degree, the interpupillary distance and the patient's face, and then assemble the lens onto the frame. With the pursuit of higher quality of life, the use of ordinary conventional fitting lenses with standardized degrees of 0.25D interval to correct refractive errors can no longer meet the needs of patients. The finished lenses are usually only close to 0.25D which is similar to spherical and columnar correction. Incremental prescriptions, and thus correction accuracy may not be sufficient.

After investigation, the existing technology still has the following shortcomings:

1. The current fitting prescription lacks the database storage unit required for personalization.

With the increasing demand for personalized products and the increasing attention to visual health at different age levels, according to the patient's own situation, the demand for measuring accurate optometry parameters and matching and manufacturing customized glasses is increasing, and customized glasses will become It has the most important products in the sales system that meets the standard of eye health. Therefore, the fitting prescription also requires more data storage units to cover the various situations encountered by professional eye care personnel in practical applications, including optimizing the design parameters of the glasses according to the age and occupational factors of different patients. .

2. Current glasses do not meet the requirements for retinal resolution.

Traditional optometry is an interval of 0.25D (25 degrees), and not everyone can accurately correct vision to 1.0.

For the first time adolescents with glasses, or those with sensitive eyes, it can be seen that the configured glasses will cause discomfort such as dizziness and bloating at the beginning of wearing, and a considerable number of patients will have decreased vision after long-term wear. After the age of 40, as the lens of the human eye gradually hardens, entering the early stage of presbyopia, the ciliary muscle gradually becomes paralyzed, making it impossible for the human eye to effectively adjust the shape of the eyeball (axial change), only by adjusting the distance between the eye and the object being viewed. When you look at nearby objects, you must move far to see them clearly. Because of the characteristics of presbyopia, the eye has poor adjustment ability to look far and see. For example, when the user's visual diopter is +4.00D (commonly known as 400 degrees), the vision adjustment ability can only work within a few centimeters. A pair of reading glasses only adds a fixed diopter to the user's vision, and Does not enhance the user's vision adjustment. Because each person's presbyopia is different, the presbyopia of the two eyes may be different, and some people have presbyopia, as well as vision problems such as farsightedness, myopia, astigmatism, etc. The reading glasses can not only solve the problem, but also cause problems such as eye swelling and headache.

A prescription for a precision vision correcting lens that meets retina resolution must include simultaneous accurate correction of power and astigmatism to a resolution less than the retina resolution of the human eye, rather than correcting only second-order astigmatism or correcting all aberrations simultaneously.

3. The traditional glasses fitting and manufacturing are carried out separately, lacking information communication, manufacturing and assembly work.

At present, the process of customized visual correction program is: optometry, garage processing, customized processing, assembly. In this process, data acquisition and lens processing are performed separately, resulting in large manufacturing and assembly work, and information communication errors make it difficult to obtain products that meet optometry health standards and high comfort.

technical problem

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Technical solution

In view of one or more of the deficiencies mentioned in the background, the present invention proposes a lens conforming to retinal resolution and a fitting prescription and manufacturing method thereof, which can significantly improve vision and reduce eye discomfort caused by wearing.

The present invention is implemented as follows:

A fitting prescription for a lens conforming to retina resolution, comprising the steps of: S1, measuring optical characteristic data of a patient's eye, including characteristic data sets of wavefront aberration and corneal topographic data, and transmitting to a computer interface for creation Calculating the basis of the model eye, wherein the measurement accuracy of the aberration is expressed as a power difference <0.06D; S2, the computer converts the optical characteristic data into function information; S3, the function information is fed to the optical aided design module, optically assisted The design module completes the preliminary design of the lens; S4, the preliminary design of the lens is evaluated by the optical analysis module, including feedback of the visual performance results to the optical aided design module by calculating the model eye to redesign and optimize the lens design until The power correction is set to cancel the aberration between -0.03D and +0.03D; simultaneously correct two to five of the power aberrations; S5, the optical design parameters, the segmentation design parameters, and The patient's age and occupational factors are provided to the computer database; S6, the computer searches through the database to further optimize the lens design; The corrective effect of the patient after wearing was simulated by an optical simulation system to further confirm the comfort of use.

As a further improvement of the present invention, the S6 further includes further optimizing the design of the lens by gradually adding and subtracting the diopter change <0.12D lens inserting pattern in front of the patient's eyes, and finally determining the most suitable lens.

As a further improvement of the present invention, a power meter or a wavefront sensor is used to measure optical property data of a patient's eye.

As a further improvement of the present invention, the optically assisted design module performs a preliminary design of the lens by optical design software, including ZEMAX and Onshape, the preliminary design including a double-sided free-form surface design.

As a further improvement of the present invention, the optical design parameters include a pupil diameter range, an alternating/simultaneous function, and a monocular/binocular function, the segmented design parameters including the area and area of the region, discrete/progressive regions.

A method of manufacturing a lens conforming to retinal resolution, comprising using the fitting prescription according to any one of claims 1-5, and comprising the step of: S7, optical analysis from S6 by a conversion module The result data of the module is converted into a format that can be used by the mechanical module to conform to the design format of the mechanical production; S8, the lens is manufactured using a 3D printer or a CNC machine cutting system.

As a further improvement of the present invention, the lens is made of a photocurable or thermosetting resin material.

A lens conforming to the resolution of the retina is produced by the manufacturing method according to claim 6 or 7.

As a further improvement of the present invention, the diopter change interval of the lens ranges from 5 to 25 degrees.

As a further improvement of the present invention, the diopter change interval of the lens is less than 5 degrees.

Compared with the prior art, the beneficial effects of the present invention are:

By adopting the fitting prescription of the invention, the lens design conforming to the retina resolution is obtained by controlling the measurement precision and the correction precision; and the design parameters of the glasses according to the age and occupation factors of different patients are satisfied by establishing a database required for personalization customization. optimize.

By adopting the manufacturing method of the invention, the fitting and manufacturing of the lens are seamlessly connected, the information is intercommunicated, and the work difference is smaller.

The present invention provides an optometry system for a precision optometry sheet having a smaller variation interval. The optometry of the national standard system is a change interval of 25 degrees, and the lens of the optometry system of the invention can be changed between 5-25 degrees, and the lens change interval can be backward compatible with the 25 degree change of the national standard. Interval; it can be finely divided within 5 degrees, which is more accurate than the national standard system, and highlights the manufacturing ability of high-precision customized lenses.

Beneficial effect

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DRAWINGS

1 is a schematic flow chart of a fitting prescription and a manufacturing method of a lens conforming to retinal resolution.

BEST MODE FOR CARRYING OUT THE INVENTION

The description of the preferred embodiment of the invention is entered here.

Embodiments of the invention

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Example 1

S1, measuring the optical characteristics of the patient's eye with a high-precision customized power meter or wavefront sensor and generating a characteristic data set for transmission to a computer interface including, but not limited to, wavefront aberration and corneal topographic data for creating a computational model eye Foundation. Among them, the measurement accuracy of the aberration is expressed as a power difference <0.06D. The high-precision customized power meter or wavefront sensor here refers to an optical instrument that can satisfy the above measurement accuracy.

S2. The computer converts the optical characteristic data into function information.

S3, the function information is fed to an optical computing aid (CAD) design module, and the optical aid design module completes the preliminary design of the lens through optical design software, including but not limited to double-sided free-form surface design such as toroidal defocus. Optical design software includes, but is not limited to, commercial lens software such as ZEMAX, Onshape, and self-developed free-form optical designs.

S4, the preliminary design of the lens is evaluated by the optical analysis module, including feeding the result of the visual performance to the optical auxiliary design module through the calculation model generated based on the set of characteristic data, to redesign and optimize the design of the lens until the optical focus The degree correction is accurately set to cancel the aberration between -0.03D and +0.03D; while correcting two to five of the power aberrations. Wherein, correcting two to five of the power aberrations at the same time means that the power of different positions of the human eye is different, and the correction of 2-5 points is satisfied, that is, multi-focus.

S5, optical design parameters (eg pupil diameter range, alternating/simultaneous function, monocular/binocular function), segmented design (eg area of area and area, discrete/progressive area, etc.) and age and occupational factors of the patient Provided to the computer database.

S6, the computer through the database retrieval, simulation of the optical simulation system and custom precision insert method (refer to the gradual increase or decrease of diopter change in the patient's eyes less than 0.12D lens) to further optimize the lens design, determine the most suitable lens.

S7, through the conversion module to convert the result data from the optical analysis module into a format that can be used by the mechanical module to convert the optical design into a design format that conforms to the mechanical production.

S8, the lens is manufactured by using a 3D printer and a numerical control machine cutting system by analyzing the designed lens surface, and the material is a photocurable or thermosetting resin material.

To develop a visual correction program and improve the visual quality of the human eye after correction, a very important link is to obtain a true and accurate refraction of the human eye before correction. In this embodiment, the high-precision customized power meter or wavefront aberration measurement technology conforming to the physical principle can be used to accurately distinguish the optometry by <±0.06D. In addition to customers with amblyopia and other eye diseases, it can not only help the need for accurate vision correction, but also ensure that there is no discomfort such as dizziness and swelling after wearing.

Introducing the optical analysis module, it can meet the basic requirements of optometry, and can meet the visually comfortable closest clear interval (for example: 4.10D is more comfortable than 4.25D, no discomfort such as dizziness, and clearer than 4.00D). The optical analysis module of the present invention includes simultaneous accurate correction of power and astigmatism to less than the human eye retina resolution limit (focus interval < ± 0.06 D), rather than correcting only second-order astigmatism or simultaneously correcting all aberrations. At the same time, the correction accuracy can be reasonably matched with the manufacturing error of advanced free-form surface processing technology, providing a method for mass customization of precise vision correction lenses.

The diopter change interval of the lens of Example 1 can be in the range of 5-25 degrees. At present, the lenses used in the national standard are 25-degree interval changes. For example, through precise equipment optometry and customized lens matching in the range of 5 degrees, the patient can finally provide prescription glasses with a range of 5 degrees, and with customized lenses. The manufacturing capability, the lens change interval can be backward compatible to the 25-degree variation range of the national standard, and the lens can be provided with more precise, retinal resolution and more comfortable lenses.

In the lens processing by the combination of CNC machine cutting system or 3D printing, more precise free-form surface digital manufacturing can be realized, for example, a non-rotation-symmetric special curved surface that changes the aspherical surface of the lens meridian to another lens meridian. Such lenses are effective in improving the clear vision of a wearer with astigmatism maintaining a large viewing angle.

Example 2 - Example 4 Example 1 is further illustrated by a true fitting and manufacturing example.

Example 2

Patient 1 (44 years old), optometry data: left eye: -2.65, right eye: -2.65.

The optometry data is input into the computer. The computer works according to the patient's work, and uses the characteristics of the eye environment at a close distance to correct the initial data, and obtains the parameters of the left eye: -2.53, right eye: -2.53. For the case where the value of the diopter is less than -5.00, the material with a refractive index of 1.597 is selected for the next model design process. Through the optical simulation system, the corrective effect after the patient is worn is simulated, and the optometry sheet of the 5-degree change interval is actually worn and corrected to further confirm the comfort of use.

After obtaining the final 3D model, according to the design characteristics of the lens, the CNC machine tool cutting system is selected to manufacture the lens, and the material selected is a thermosetting optical resin material. The surface of the product is coated after machining. Next, trim and assemble.

Example 3

Using the technical solution of the embodiment 1, the best correction plan for obtaining the patient 2 is: left eye: -2.55, right eye: -2.55.

The optometry and correction of the current national standard 25 degree interval are used for optometry and correction, which can only be selected in the left eye: -2.50, right eye: -2.50 or left eye: -2.75, right eye: -2.75;

The optometry and correction are performed using a 10 degree interval optometry, which can only be selected in the left eye: -2.50, right eye: -2.50 or left eye: -2.60, right eye: -2.60;

Using optometry with 5 degree interval for optometry and correction, the optometry data can be accurately obtained and corrected to: left eye: -2.55, right eye: -2.55.

The medical data proves that the minimum resolution of the human eye for visual correction is 0.0625D, so the optometry and correction using the 5-degree interval can achieve the theoretical best correction plan.

Example 4

Patient 3 (48 years old), optometry data: left eye: -3.25 / -0.75 / 2, right eye: -2.5 / -1 / 155.

The optometry data is input into the computer, and the computer works according to the patient's work, and the eye environment is relatively close at a close distance, and has the characteristics of myopia and astigmatism, and the initial data is corrected. For the case where the value of the diopter is less than -5.00, the material with a refractive index of 1.597 is selected for the next model design process. Through the optical simulation system, the corrective effect of the patient after wearing is simulated to further confirm the comfort of use. The parameters obtained were left eye: -3.45/-0.75/2, right eye: -2.25/-1/155.

After obtaining the final 3D model, the lens is manufactured by high-precision 3D printing according to the design characteristics of the lens, and the material selected is a photocurable optical resin material. After printing, the lens is cleaned and post-treated, and then subjected to surface coating treatment.

It should be noted that with the fitting prescription and manufacturing method of the present invention, the lens having a diopter change interval of less than 5 degrees can be further obtained under the condition of further improving the measurement accuracy, the calibration accuracy, and the precision of the manufacturing equipment. Therefore, the object of the present invention is not only to obtain a lens with a certain diopter change interval, but also to further improve the accuracy of the optometry system and further improve the manufacturing capability of the customized lens.

The above is only the 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 in the protection of the present invention. Within the scope.

Industrial applicability

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Sequence table free content

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Claims (10)

1. A fitting prescription for a lens conforming to retinal resolution, comprising the steps of:

   S1, measuring optical characteristic data of the patient's eye, including the characteristic data set of the wavefront aberration and the corneal topographic map data and transmitting to the computer interface for creating a basis for calculating the model eye, wherein the measurement accuracy of the aberration is expressed as the power Poor <0.06D;

   S2, the computer converts the optical characteristic data into function information;

   S3, the function information is fed to the optical auxiliary design module, and the optical auxiliary design module completes the preliminary design of the lens;

   S4, the preliminary design of the lens is evaluated by the optical analysis module, including feeding back the result of the visual performance to the optical auxiliary design module by calculating the model eye, to redesign and optimize the design of the lens until the power correction is set to offset the The aberration is between -0.03D and +0.03D; simultaneously correct two to five of the power aberrations;

   S5, providing optical design parameters, segmentation design parameters, and age and occupation factors of the patient to a computer database;

   S6, the computer further optimizes the design of the lens through database retrieval; and simulates the correction effect after the patient wears through the optical simulation system to further confirm the comfort of use.
2. A fitting prescription for a retinal resolution-compliant lens according to claim 1, wherein said S6 further comprises: further optimizing the design of the lens by gradually adding or subtracting a diopter change <0.12D lens inserting pattern in front of the patient's eye. .
3. A fitting prescription for a retinal resolution-compliant lens according to claim 1, characterized in that the optical characteristic data of the patient's eye is measured using a power meter or a wavefront sensor.
4. The fitting prescription for a retinal resolution-compliant lens according to claim 1, wherein the optical auxiliary design module performs preliminary design of the lens by optical design software, the optical design software including ZEMAX and Onshape, The preliminary design includes a double-sided free-form surface design.
5. A fitting prescription for a retinal resolution-compliant lens according to claim 1 wherein said optical design parameters include a pupil diameter range, an alternating/simultaneous function, and a monocular/binocular function, said segmented design parameters Includes area and area, discrete/progressive areas of the area.
6. A method of manufacturing a lens conforming to retinal resolution, comprising using the fitting prescription according to any one of claims 1-5, and comprising the steps of:

   S7, through the conversion module, converting the result data from the optical analysis module in S6 into a format that can be used by the mechanical module to conform to the design format of the mechanical production;

   S8, the lens is manufactured using a 3D printer or a CNC machine cutting system.
7. The method of manufacturing a retinal resolution-compliant lens according to claim 6, wherein the lens is made of a photocurable or thermosetting resin material.
8. A lens conforming to retinal resolution, which is obtained by the manufacturing method according to claim 6 or 7.
9. The retinal resolution-compliant lens according to claim 8, wherein the lens has a diopter change interval ranging from 5 to 25 degrees.
10. The retinal resolution-compliant lens of claim 8 wherein the diopter change interval of the lens is less than 5 degrees.