Near glasses fitting method for myopia prevention and control

Abstract

The invention discloses a near glasses fitting method for myopia prevention and control, and belongs to the field of myopia prevention and control. The problems that read-write glasses obtained according to an existing fitting method are poor in applicability and poor in myopia prevention and control effect are solved. According to the technical scheme, the method comprises the following steps that the accurate diopter of a detected person is obtained through objective optometry and subjective optometry, the initial spherical power is S, the cylindrical power is C, the additional spherical power S1 = 1 / f-1 / F on the basis of the distant optometry is calculated according to the actual habitual eye using distance f and the simulated eye using distance F of a patient, and the additional spherical power S1 = 1 / f-1 / F is calculated according to the actual habitual eye using distance f and the simulated eye using distance F of the patient; calculating the total spherical power SP = S + S1 to obtain the actual gradient AC / A = Y2-Y1 when the positive spherical lens is added to the detected person, further obtaining the additional value P1 = S1 * AC / A of the first prism, calculating the additional value P2 = (2 * BI blurring point-BO blurring point) / 3 of the second prism, and comparing the additional value of the first prism with the additional value of the second prism to obtain the final prism addition degree and the final spherical power; the invention is applied to the visual light industry.

Description

Technical Field

[0001] The invention provides a near-eye glasses fitting method for myopia prevention and control, belonging to the technical field of myopia prevention and control. Background Art

[0002] With the increase in the overall incidence of myopia among children and adolescents, the task of myopia prevention and control is arduous. As we all know, when people look far away, they are in a state of adjustment and relaxation, and the eye position is abducted. At this time, both the intraocular muscles and the extraocular muscles are in a relaxed state, and myopia is not easy to occur; when looking near, the lens adjustment and eyeball convergence cause muscle tension to form visual fatigue. Due to the combined action of the lens adjustment and the internal and external rectus muscles, the eye axis develops at an accelerated rate, resulting in axial myopia, which is the main cause of myopia at present. At present, it is usually based on the distance optometry to add optical lenses, such as adding positive spherical lenses and / or prisms, to reduce the adjustment and convergence requirements required for close-range eye use, thereby alleviating the muscle tension caused by the two parts of adjustment and convergence, thereby controlling the growth degree of the eye axis, and achieving the purpose of preventing and controlling myopia. The parameters of traditional reading and writing glasses are fixed values, which are positive spherical lenses + 1.50DS for near use, and three prisms are added to the left and right eyes. Although it can alleviate the problem of visual fatigue caused by children's near use of the eyes to a certain extent, it is not suitable for all subjects. Some examinees have larger eye positions and weaker image fusion abilities. Wearing reading-writing glasses with the above-mentioned fixed parameters cannot effectively relieve visual fatigue and may even cause greater strabismus problems. Some examinees have smaller eye positions and do not need so much relaxation. Wearing reading-writing glasses with the above-mentioned fixed parameters may cause more visual function problems.

[0003] The Chinese invention patent (CN112656361A) proposes a fitting method and a method of using functional glasses, which provides three fitting methods, namely, calculating the value of the required additional spherical lens according to the actual adjustment ability and adjustment requirements of the eyes; calculating the value of the required additional prism according to the actual convergence ability and convergence requirements of the eyes; calculating the value of additional functional lenses such as additional spherical lenses and prisms according to the actual adjustment and convergence and other visual function abilities of the eyes and the adjustment and convergence and other visual function requirements. However, the fitting method may need to set a safe multiple value M of the adjustment ability required for long-term and comfortable eye use or determine a safe multiple value N of the convergence ability, but the determination of the safe multiple value M of the adjustment ability and the safe multiple value N of the convergence ability does not provide an exact calculation method. Summary of the invention

[0004] In order to solve the technical problems that reading and writing glasses obtained according to existing fitting methods have poor applicability and poor myopia prevention and control effects, the present invention proposes a near glasses fitting method for myopia prevention and control, with the purpose of further solving the problem of personal close-range eye comfort and improving the effect of myopia prevention and control by improving the near glasses fitting method.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: comprising the following steps: Step 1: Obtain the subject's accurate refractive power through objective optometry and subjective optometry, where the initial spherical power is S and the cylindrical power is C; Step 2: Calculate the spherical power S1=1 / f-1 / F added to the distance optometry power according to the patient's actual habitual eye distance f and the simulated eye distance F, where both f and F are in meters; Step 3: Calculate the total additional spherical power SP=S+S1; Step 4: Perform full correction of the subject's refractive error, and then make the subject's eyes look at the sight mark, and record the first eye position detected at this time as Y1; after adding a +1.00DS positive spherical lens in front of both eyes, make the subject's eyes look at the sight mark again, and record the second eye position detected at this time as Y2, and obtain the actual gradient AC / A=|Y2-Y1| of the subject when the positive spherical lens is added, and then obtain the first prism addition value P1=S1*AC / A; Step 5: Detect the latent degree of the subject's eyes, obtain the BI blur point and the BO blur point, and calculate the second prism added value P2 = (2*BI blur point - BO blur point) / 3 according to the BI blur point and the BO blur point; Step 6: Obtain the final prism addition degree and final spherical degree: When P1≤P2, the final prism addition degree P0=P1, and the final additional spherical degree S0=SP; When P1>P2, the final prism addition power P0=P2, and the final additional spherical power S0=SP-(P1-P2) / AC / A; Step 7. Obtain the final myopia prevention and control eyeglass prescription: the final prism addition power is P0, the final spherical addition power is S0, the base direction is BI, and the cylindrical power is C.

[0006] Furthermore, the value of the simulated eye distance F is determined according to the actual near eye use time of the subject. If the average daily near eye use time of the subject is less than 2 hours, the simulated eye distance F is 1 meter; if the average daily near eye use time of the subject is within 2 to 4 hours, the simulated eye distance F is 1.5 meters; if the average daily near eye use time of the subject is more than 4 hours, the simulated eye distance F is 2 meters.

[0007] Furthermore, in the step 4, the first eye position Y1 is the eye position parameter measured by making the subject's eyes look at the sight mark 40 cm in front of the eyes, and the second eye position Y2 is the eye position parameter measured by adding a +1.00DS positive spherical lens in front of both eyes and making the subject's eyes look at the sight mark 40 cm in front of the eyes again.

[0008] Furthermore, the device used for objective optometry in step 1 is a computer ophthalmometer, which is used to check the focusing condition of light after it enters the eyeball.

[0009] Furthermore, the implicit skewness is detected according to conventional methods, and the parameters of the BI blur point and the BO blur point are obtained.

[0010] The beneficial effects of the present invention compared with the prior art are as follows: 1. The near-eye glasses fitting method for myopia prevention and control of the present invention comprehensively considers the habitual eye distance f, the simulated eye distance F, the full correction eye position parameters of refractive error, the degree of latent deviation, etc., and can be fitted according to individual characteristics, solve the problem of the subject's habitual eye comfort at close range, reduce the adjustment requirements when using the eyes at close range, and ensure the appropriate use of the adjustment function. For people who do not have myopia, it can play a good role in preventing the occurrence of myopia and reduce the occurrence and development of myopia; 2. The value of the simulated eye distance F of the present invention is determined according to the actual near eye use time of the subject, taking into account the distance and time issues of near eye use, ensuring that the eyes of the subject do not suffer excessive fatigue when the child uses the eyes at close range for a long time, ensuring that the intraocular muscles and extraocular muscles are at a suitable intensity of use, and obtaining a relatively balanced eye use habit, so that when using the eyes at close range, the eyeball is in the most relaxed state within the range allowed by the eye position, which plays a positive role in preventing and controlling myopia and controlling the increase in myopia degree. DETAILED DESCRIPTION

[0011] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate relative positions or positional relationships, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.

[0012] Near-sightedness control is mainly to solve the problem of visual fatigue when using the eyes at close range. Therefore, the near-sightedness glasses fitting method for myopia control of the present invention is mainly to solve the problem of visual fatigue when the subject's eyes are used at a distance of 1 to 2 meters.

[0013] The present invention provides a method for fitting near-sighted glasses for myopia prevention and control, comprising the following steps: Step 1: Obtain the subject's accurate refractive power through objective and subjective optometry, where the initial spherical power is S and the cylindrical power is C.

[0014] Specifically, objective optometry is performed through a computer ophthalmometer to objectively measure the position of the light reflected by the fundus or cornea of ​​the eye being examined, thereby judging the refractive state of the optical system of the eyeball or the corneal surface and detecting the initial refractive power of the subject; then after the subject wears corrective lenses based on the initial refractive power, under the condition of subjective visual response, the examiner further verifies the refractive state of the subject's eyes directly according to the subject's vision level and the law of vision change, and obtains the adjusted refractive power. Subjective optometry consists of two parts: spherical verification and cylindrical (degree and axial) verification.

[0015] Step 2: Calculate the spherical power S1=1 / f-1 / F added to the distance optometry power according to the patient's actual habitual eye distance f and the simulated eye distance F, where the unit of f is meter; Specifically, the prevention and control of myopia is mainly to relieve the muscle tension caused by the two parts of accommodation and convergence by adding optical lenses to control the growth degree of the eye axis, so the value of relief becomes the main parameter. The present invention uses the simulated eye distance as the value of relief, and sets the simulated eye distance as F, with the unit of meter; The value of the simulated eye distance F is determined according to the actual near eye use time of the subject. If the average daily near eye use time of the subject is less than 2 hours, the simulated eye distance F is 1 meter; if the average daily near eye use time of the subject is between 2 and 4 hours, the simulated eye distance F is 1.5 meters; if the average daily near eye use time of the subject is more than 4 hours, the simulated eye distance F is 2 meters.

[0016] Step 3: Calculate the total additional spherical power SP=S+S1.

[0017] Step 4: Perform full correction on the subject's refractive error, then have both eyes of the subject fixate on a sight mark 40 cm in front of the eyes, and record the eye position detected at this time as Y1; after attaching a +1.00DS positive spherical lens in front of both eyes, have both eyes of the subject fixate on a sight mark 40 cm in front of the eyes again, and record the eye position detected at this time as Y2, and obtain the actual gradient AC / A=|Y2-Y1| of the subject when the positive spherical lens is attached, and then obtain the first prism addition value P1=S1*AC / A.

[0018] Step 5: Detect the latent degree of the subject's eyes according to the conventional method to obtain the BI blur point and the BO blur point. Calculate the second prism added value P2 = (2*BI blur point - BO blur point) / 3 based on the BI blur point and the BO blur point. The second prism added value P2 is within the range allowed by the eye position, and the eyeball is in the most relaxed state.

[0019] Step 6: Compare the first prism addition value with the second prism addition value to obtain the final prism addition power and final spherical power added on the basis of the farsighted correction glasses; When P1≤P2, the final prism addition degree P0=P1, and the final additional spherical degree S0=SP; When P1>P2, the final prism addition power P0=P2, and the final additional spherical power S0=SP-(P1-P2) / AC / A.

[0020] Step 7: Obtain the final myopia prevention and control prescription, that is, the final prism addition power is P0, the final spherical power is S0, the base direction is BI, and the cylindrical power is C. The final prism addition power and the final spherical power can be added to the distance lens power, and then the professional and technical personnel in this field can make personalized adjustments based on the experience and feedback of the examinee during the trial wearing to determine the final power of the glasses.

[0021] The initial parameters involved in the near eyeglass fitting method of the present invention can be obtained through existing inspection and monitoring equipment on the market, such as infrared detection equipment, laser detection equipment, etc., as long as they are combined with other detection equipment required for fitting glasses on the market, the initial parameters of the fitting method of the present invention can meet the subsequent parameter calculations.

[0022] Regarding the specific structure of the present invention, it should be noted that the connection relationship between the various component modules adopted in the present invention is definite and feasible. Except for special instructions in the embodiments, the specific connection relationship can bring about corresponding technical effects, and solve the technical problems raised by the present invention without relying on the execution of corresponding software programs. The components, modules, models of specific components, the connection methods between each other, and the conventional use methods and expected technical effects brought about by the above-mentioned technical features, except for specific instructions, all belong to the disclosed contents in patents, journal articles, technical manuals, technical dictionaries, and textbooks that can be obtained by technical personnel in this field before the application date, or belong to the existing technologies such as conventional technologies and common knowledge in this field, and there is no need to elaborate, so that the technical solution provided in this case is clear, complete, and feasible, and the corresponding physical products can be reproduced or obtained according to the technical means.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for fitting near-eye glasses for myopia prevention and control, characterized in that: The following steps are involved: Step 1: Obtain the subject's accurate refractive power through objective optometry and subjective optometry, where the initial spherical power is S and the cylindrical power is C; Step 2: Calculate the spherical power S1=1 / f-1 / F added to the distance optometry power according to the patient's actual habitual eye distance f and the simulated eye distance F, where both f and F are in meters; Step 3: Calculate the total additional spherical power SP=S+S1; Step 4: Perform full correction of the subject's refractive error, and then make the subject's eyes look at the sight mark, and record the first eye position detected at this time as Y1; after adding a +1.00DS positive spherical lens in front of both eyes, make the subject's eyes look at the sight mark again, and record the second eye position detected at this time as Y2, and obtain the actual gradient AC / A=|Y2-Y1| of the subject when the positive spherical lens is added, and then obtain the first prism addition value P1=S1*AC / A; Step 5: Detect the latent degree of the subject's eyes, obtain the BI blur point and the BO blur point, and calculate the second prism added value P2 = (2*BI blur point - BO blur point) / 3 according to the BI blur point and the BO blur point; Step 6: Obtain the final prism addition degree and final spherical degree: When P1≤P2, the final prism addition degree P0=P1, and the final additional spherical degree S0=SP; When P1>P2, the final prism addition power P0=P2, and the final additional spherical power S0=SP-(P1-P2) / AC / A; Step 7. Obtain the final myopia prevention and control eyeglass prescription: the final prism addition power is P0, the final spherical addition power is S0, the base direction is BI, and the cylindrical power is C.

2. A method for fitting near glasses for myopia prevention and control according to claim 1, characterized in that: The value of the simulated eye distance F is determined according to the actual near eye use time of the subject. If the average daily near eye use time of the subject is less than 2 hours, the simulated eye distance F is 1 meter; if the average daily near eye use time of the subject is within 2 to 4 hours, the simulated eye distance F is 1.5 meters; if the average daily near eye use time of the subject is more than 4 hours, the simulated eye distance F is 2 meters.

3. A method for fitting near glasses for myopia prevention and control according to claim 1, characterized in that: The first eye position Y1 in step 4 is the eye position parameter measured by making the subject's eyes look at the sight mark 40 cm in front of the eyes, and the second eye position Y2 is the eye position parameter measured by adding a +1.00DS positive spherical lens in front of both eyes and making the subject's eyes look at the sight mark 40 cm in front of the eyes again.

4. A method for fitting near-sighted glasses for myopia prevention and control according to claim 1, characterized in that: The device used for objective optometry in step 1 is a computer optometry instrument, which is used to check the focusing condition of light after it enters the eyeball.

5. A method for fitting near glasses for myopia prevention and control according to claim 1, characterized in that: The implicit skewness is detected according to conventional methods, and the parameters of the BI fuzzy point and the BO fuzzy point are obtained.