Method for quickly calculating equivalent spherical power and spherical power value based on eyeball morphological parameters

Abstract

The invention belongs to the field of ophthalmology detection, and particularly relates to a method for rapidly calculating equivalent spherical power and a spherical power value based on eyeball morphological parameters. According to the method, the morphologies of the eyeballs of a person to be measured, including the anterior chamber depth AD, the ocular axis length AL, the crystal thickness LT, the cornea anterior surface K1 value, the cornea anterior surface K2 value and the like, are measured twice, and an adaptive model is provided according to the variation of the morphological parameters of the eyeballs measured twice; and the measured parameter values are substituted into the model according to the model, so that the equivalent spherical power and the numerical value of the spherical power can be quickly and accurately obtained. According to the method provided by the invention, only one time of mydriasis optometry needs to be carried out on children and teenagers within four years, tedious operation of mydriasis in the subsequent examination process is omitted, multiple check coefficients are added into the provided model, and the accuracy of model calculation is relatively high.

Description

Technical Field

[0001] The present invention belongs to the field of ophthalmic testing, and in particular relates to a method for quickly calculating equivalent spherical power and spherical power values ​​based on eyeball morphological parameters. Background Art

[0002] Routine vision examinations for adolescents and children are the best way to detect myopia. If myopia is not corrected promptly and accurately, vision problems such as low vision, eye dysfunction, and fundus diseases will occur, causing damage to eye visual health and must be given sufficient attention.

[0003] However, the eyes of adolescents and children have stronger accommodative power. If the pupils are not dilated during eye examination, the accommodative effect of the ciliary muscle can make the lens convex and the refractive power enhanced. The accommodative myopia, the so-called pseudomyopia component, cannot be removed, but will affect the accuracy of the eye examination results. Therefore, mydriasis refraction is very necessary for vision examination of adolescents and children.

[0004] The purpose of mydriasis is to relieve eye fatigue and relax tense muscles. Although the mydriasis operation itself will not cause adverse effects on the eyes of adolescents or children, there may be temporary photophobia and blurred vision of close objects after mydriasis. The time it takes for vision to return to normal varies from person to person, ranging from 4-6 hours to 2-3 weeks. If mydriasis is performed before each eye examination, it will not only be cumbersome but also cause a lot of inconvenience to the child.

[0005] Therefore, it is extremely necessary to provide a method for detecting vision of adolescents and children of different ages that is more accurate and can reduce the number of mydriasis operations. Summary of the Invention

[0006] In order to solve the above technical problems, the present invention provides a method for quickly calculating the equivalent spherical power and the spherical power value based on eyeball morphological parameters.

[0007] The present invention provides a method for quickly calculating equivalent spherical power and spherical power values ​​based on eyeball morphological parameters, comprising the following steps: S1 performs a first measurement of the morphological parameters of the eyeball, wherein the morphological parameters of the eyeball include: anterior chamber depth AD, axial length AL, lens thickness LT, anterior corneal surface K1 value, and anterior corneal surface K2 value; S2 dilates the eyeball, and after the pupil is completely dilated, the first optometry test is performed to obtain the initial spherical equivalent power and spherical power values, which are recorded as SE0 and SP0; S3 performs a second measurement of the morphological parameters of the eyeball measured in S1; S4 calculates the change of each parameter based on the measurement results of the eyeball morphological parameters twice, and brings it into the fast calculation model of the equivalent spherical power and the spherical power value to obtain the first predicted equivalent spherical power and the spherical power value SE1 and SP1; The fast calculation model is: SE1=SE0-[(1.72±0.65)+α+γ]×ΔAL±δ, SP1=SP0-[(1.72±0.65)+α+γ]×ΔAL±δ; Among them, α is the follow-up error, and the value range of α is between -0.15 and 0.3; γ is the age-related coefficient, γ=0.05×age value; ΔAL is the change in axial length, ΔAL=AD 第二次测定值 -AD 第一次测定值 , δ is the error coefficient related to the eye morphological parameters, and the value range of δ depends on the variation of each measured eye morphological parameter; S5: Within 4 years of the first dilated mydriatic refraction, the ocular morphological parameters are measured for the third, fourth, and nth time, where n is an integer greater than 4. Based on the first measured ocular morphological parameters, the change between the two measured morphological parameters is calculated and incorporated into the following calculation model to quickly and accurately calculate the equivalent spherical power and spherical power value at each test; The calculation model of the equivalent spherical power and spherical power value predicted for the nth time is: SE n-1 =SE0-[(1.72±0.65)+α+γ]×ΔAL±δ, SP n-1 =SP0-[(1.72±0.65)+α+γ]×ΔAL±δ, where α is the follow-up error, and the value range of α is between -0.15 and 0.3; γ is the age-related coefficient, γ=0.05×age value; ΔAL is the change in axial length, ΔAL=AD 第n次测定值 -AD 第1次测定值 , δ is the error coefficient related to the eye morphological parameters, and the value of δ depends on the change of each measured eye morphological parameter.

[0008] Preferably, α is the follow-up error, ie, the error correction between the follow-up time and the time of the first mydriatic refraction examination.

[0009] Traditionally, the interval between the first mydriasis refraction and the next mydriasis refraction for adolescent children is approximately 3 to 12 months. If mydriasis refraction is performed according to the traditional method, 4 to 16 mydriasis refractions will be required within 4 years.

[0010] In the present invention, only mydriatic refraction is required during the first examination. In the subsequent testing process within 4 years, only the morphological parameters of the eyeball need to be measured and repeated mydriatic refraction is no longer required. Since the time interval between the next test and the first mydriatic refraction cannot be determined in reality, the change amplitude of each eyeball parameter over time during this period is also different. Therefore, the present invention introduces a follow-up parameter for correction of this variable that may affect the accuracy of the equivalent spherical power and the spherical power numerical calculation results.

[0011] Specifically, the α value is determined based on the results of clinical trials and the interval of follow-up time after the first mydriatic refraction examination. The follow-up time is in the range of 1.5 months to 49.5 months, and the α value is between -0.15 and 0.3.

[0012] Furthermore, according to the statistical analysis of clinical data, the α value was set as -0.15 for follow-up within 1.5-4.5 months after the first dilated optometry examination, -0.1 for follow-up within 4.5-7.5 months, -0.05 for follow-up within 7.5-10.5 months, 0 for follow-up within 10.5-13.5 months, 0 for follow-up within 13.5-16.5 months, 0.05 for follow-up within 16.5-18 months, and 0.1 for follow-up within 18.5-20 months. For follow-up within 6.5-19.5 months, α is recorded as 0.1; for follow-up within 19.5-22.5 months, α is recorded as 0.15; for follow-up within 22.5-25.5 months, a is recorded as 0.2; for follow-up within 25.5-37.5 months, a is recorded as 0.25; for follow-up within 37.5-49.5 months, a is recorded as 0.3. If the initial value exceeds 49.5, dilation refraction is required and the cycle is repeated based on this value.

[0013] In addition, since mydriatic refraction has not been performed for 4 years, it is recommended to perform mydriatic refraction again at this time, and use the mydriatic refraction test results at this time as the initial value and cycle in sequence.

[0014] By adopting the method of the present invention, adolescent children only need to undergo mydriasis refraction once within at least 4 years. Subsequent refraction does not require mydriasis. The measured eye morphological parameters and the changes in each parameter can be brought into the relevant model to quickly and accurately obtain the predicted equivalent spherical power and spherical power value.

[0015] Among the above methods, preferably, the mydriasis described in S2 is performed for children under 6 years old undergoing their first optometry examination. 1.0% atropine eye ointment is used for mydriasis, 2 to 3 times a day, for 3 to 5 consecutive days. For children over 6 years old undergoing their first optometry examination, topical anesthetic is first used for eye dilation, and then 1.0% cyclopentanone eye drops are used 2 to 3 minutes later, once every 5 minutes, for 3 times.

[0016] Preferably, in S2, whether the pupil is completely dilated is determined by the following method: When atropine eye ointment is applied, the pupil diameter dilates to ≥6 mm; Or after using topical anesthetics in the eyes, the pupil's direct light reflex disappears or is significantly weakened; Alternatively, the iris can be observed to be completely relaxed and without wrinkles by slit lamp observation; Alternatively, if two eye examinations are performed with an interval of 10-15 minutes and the difference in the results is ≤0.5×spherical value / cylindrical value, the pupil is considered to be completely dilated.

[0017] Preferably, in S5, when the change in the eyeball morphological parameters measured twice before and after is within the following range: 0.02 < |ΔLT| < 0.06, 0.05 < |ΔK1| < 0.16, 0.07 < |ΔK2| < 0.275, the equivalent spherical power and spherical power values ​​are calculated according to the change in the anterior chamber depth ΔAD. The fast calculation model for the equivalent spherical power and spherical power values ​​predicted for the nth time is: 0.03<|ΔAD|<0.09, SE n =SE0-(1.72±0.61+α+γ)×ΔAL,SP n =SP0-(1.72±0.61+α+γ)×ΔAL; |ΔAD|≥0.09, SE n =SE0-(1.73±0.44+α+γ)×ΔAL+δ, SP n =SP0-(1.73±0.44+α+γ)×ΔAL+δ; |ΔAD|≤0.03, SE n =SE0-(1.73±0.44+α+γ)×ΔAL-δ, SP n =SP0-(1.73±0.44+α+γ)×ΔAL-δ; In the model described, ΔAD=AD 第n次测定值 -AD 第1次测定值 , ΔLT=LT 第n次测定值 -LT 第1次测定值 , δ=(0.02±0.16)×ΔAD.

[0018] Preferably, in S5, when the change in the eyeball morphological parameters between the two previous measurements is within the following range: 0.03 < |ΔAD| < 0.09, 0.05 < |ΔK1| < 0.16, 0.07 < |ΔK2| < 0.275, the equivalent spherical power and the spherical power value are calculated according to the change in the lens thickness ΔLT. The fast calculation model for the equivalent spherical power and the spherical power value predicted for the nth time is: |ΔLT|≥0.06, SEn =SE0-(1.70±0.12+α+γ)×ΔAL+δ, SP n =SP0-[(1.70±0.12)+α+γ]×ΔAL+δ; |ΔLT|≤0.02, SE n =SE0-(1.70±0.12+α+γ)×ΔAL-δ, SP n =SP0-(1.70±0.12+α+γ)×ΔAL-δ; In the model described, ΔLT=LT 第n次测定值 -LT 第1次测定值 , ΔAL=AL 第n次测定值 -AL 第1次测定值 ,δ=(0.12±0.13)×ΔLT.

[0019] Preferably, in S5, when the change in the eyeball morphological parameters measured twice before and after is within the following range: 0.03 < |ΔAD| < 0.09, 0.02 < |ΔLT| < 0.06, 0.07 < |ΔK2| < 0.275, the equivalent spherical power and the spherical power value are calculated according to the change ΔK1 of the K1 value of the anterior corneal surface. The fast calculation model of the equivalent spherical power and the spherical power value predicted for the nth time is: |ΔK1|≥0.16, SE n =SE0-(1.71±0.32+α+γ)×ΔAL-δ, SP n =SP0-(1.71±0.32+α+γ)×ΔAL-δ; |ΔK1|≤0.05,SE n =SE0-(1.71±0.32+α+γ)×ΔAL+δ, SP n =SP0-(1.71±0.32+α+γ)×ΔAL+δ; In the model described above, ΔK1=K 1第n次测定值 -K 1第1次测定值 , ΔAL=AL 第n次测定值 -AL 第1次测定值 , δ=(0.07±0.02)×(ΔK1 / 3); Preferably, in S5, when the change in the eyeball morphological parameters measured twice before and after is within the following range: 0.03 < |ΔAD| < 0.09, 0.02 < |ΔLT| < 0.06, |ΔK1| ≤ 0.05, the equivalent spherical power and the spherical power value are calculated according to the change ΔK2 of the K2 value of the anterior corneal surface. The fast calculation model of the equivalent spherical power and the spherical power value predicted for the nth time is: |ΔK2|≥0.275, SE n=SE0-(1.73±0.21+α+γ)×ΔAL-δ, SP n =SP0-(1.73±0.21+α+γ)×ΔAL-δ; |ΔK2|≤0.07, SE n =SE0-(1.73±0.21+α+γ)×ΔAL+δ, SP n =SP0-(1.73±0.21+α+γ)×ΔAL+δ; In the model described above, ΔK2=K 2第n次测定值 -K 2第1次测定值 , ΔAL=AL 第n次测定值 -AL 第1次测定值 , δ=(0.01±0.02)×(ΔK2 / 3).

[0020] Preferably, in S5, when the changes in the eyeball morphological parameters measured between the two times are not within the above-listed ranges, the equivalent spherical power and the spherical power values ​​are calculated based on the change in the anterior chamber depth ΔAD, the change in the lens thickness ΔLT, the change in the K1 value of the anterior corneal surface ΔK1, and the change in the K2 value of the anterior corneal surface ΔK2. The fast calculation model for the equivalent spherical power and the spherical power values ​​is: SE n =SE0-(1.74±0.21+α+γ)×ΔAL+δ, SP n =SP0-(1.74±0.21+α+γ)×ΔAL+δ; in the model described above, δ=(0.02±0.16)×ΔAD+(0.12±0.13)×ΔLT+(0.07±0.02)×(ΔK1 / 3)+(0.01±0.02)×(ΔK2 / 3), ΔK1=K 1第n次测定值 -K 1第1次测定值 , ΔK2=K 2第n次测定值 -K 2第1次测定值 , ΔAD=AD 第n次测定值 -AD 第1次测定值 , ΔLT=LT 第n次测定值 -LT 第1次测定值 .

[0021] The model formula involved in the above method provided by the present invention is applicable to children with no obvious organic lesions in both eyes and transparent refractive media, but is not applicable to children with poor compliance. The beneficial effects of the present invention are: (1) The method provided by the present invention only requires one mydriatic optometry test for adolescent children within four years. During the follow-up test after mydriatic optometry, there is no need to perform mydriatic optometry again. It is only necessary to measure the morphological parameters of the eyeball, including the anterior chamber depth AD, axial length AL, lens thickness LT, anterior corneal surface K1 value, anterior corneal surface K2 value, etc., and bring the changes in the morphological parameters of the eyeball measured twice before and after into the calculation model to accurately and quickly obtain the equivalent spherical power and spherical power value. (2) The present invention introduces parameters such as age-related coefficient and follow-up error into the rapid calculation model of equivalent spherical power and spherical power value. Through a large amount of experimental data, the errors that may affect the accuracy caused by the changes of eye morphological parameters over time and age are corrected, and the measurement accuracy is higher. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in conjunction with specific embodiments.

[0023] In the following embodiments of the present invention, the steps for performing mydriasis on adolescents and children are as follows: For children under 6 years old undergoing their first eye examination, use 1.0% atropine eye ointment to dilate the pupil twice a day for 5 consecutive days. For children aged 6 years and above undergoing their first eye examination, use 1.0% cyclopentanone eye drops to dilate the pupil. First, apply a topical anesthetic once, then apply 1.0% cyclopentanone eye drops 3 minutes later. Use once every 5 minutes for a total of 3 times.

[0024] Example 1 A method for quickly calculating equivalent spherical power and spherical power values ​​based on eyeball morphological parameters, comprising the following steps: S1: The morphological parameters of the right eye of an 11-year-old child were measured for the first time; Among them, AL is 27.59, AD is 3.89, LT is 3.33, K1 is 41.17, and K2 is 41.89; S2: Dilated mydriasis was performed on the child's right eye to obtain the initial spherical equivalent power SE0 and spherical power SP0 values. The test results for the right eye were: -7.25-1.25*5=1.0, SE0 was -7.875 D, SP0=-7.25 D; S3: After 12 months, the morphological parameters of the child's right eye were measured for the second time, among which AD was 3.97, AL was 28.68, LT was 3.30, K1 was 41.06, and K2 was 42.01; At the same time, in order to verify the accuracy of the method of the present invention, the right eye was dilated and then re-examined. The results of the dilated eye refraction were: -9.25-1.75*10=1.0, SE=-10.125 D, SP=-9.25 D; S4 calculates the change of each parameter based on the measurement results of the right eyeball morphological parameters twice, and brings it into the fast calculation model of equivalent spherical power and spherical power value to obtain the first predicted equivalent spherical power SE1 and spherical power SP1.

[0025] The results of the eyeball morphological parameters measured twice are shown in Table 1 below.

[0026] Table 1 Eye morphological parameters measured before and after AL AD LT <![CDATA[K1]]> <![CDATA[K2]]> first 27.59 3.89 3.33 41.17 41.89 Second time (11 months) 28.68 3.97 3.30 41.06 42.01 |Δ| 1.09 0.08 0.03 0.11 0.12

[0027] In the table, |Δ| represents the absolute value of the difference between the two measured eye morphological parameters, namely |ΔAL|, |ΔAD|, |ΔLT|, |ΔK1|, |ΔK2|. The same applies to the following and will not be repeated here.

[0028] Since the child is 11 years old, γ = 0.05 × 11 = 0.55; and since the follow-up test time is 12 months, the α value is taken as 0; Moreover, 0.02<|ΔLT|=0.03<0.06, 0.05<|ΔK1|=0.11<0.16, 0.07<|ΔK2|=0.12<0.275, and 0.03<|ΔAD|=0.08<0.09, According to the specific condition of the child's eyes and clinical data statistics, the simplified spherical equivalent power and the rapid calculation model of the spherical power value are selected as follows: SE1=SE0-(1.62+α+γ)×ΔAL=-7.875-(1.72+0+0.55)×1.09=-10.3493 D; SP1=SP0-(1.62+α+γ)×ΔAL=-7.25-(1.72+0+0.55)×1.09=-9.72 D.

[0029] The calculated SE 1= -10.3493 D, SP1=-9.72 D. Compared with the true experimental light results SE=-10.125 D, SP=-9.25 D, the errors are less than 0.5 D. It can be seen that the method of the present invention significantly improves the accuracy of visual acuity measurement based on eye morphological parameters and greatly reduces the number of mydriasis.

[0030] Example 2 The morphological parameters of the right eyeball of an 8-year-old girl were measured using the same method as in Example 1. The results of the eyeball morphological parameters measured twice are shown in Table 2 below.

[0031] Table 2 Eye morphological parameters measured before and after AL AD LT <![CDATA[K1]]> <![CDATA[K2]]> first 24.71 3.79 3.39 42.69 42.10 Second time (10 months) 25.62 3.70 3.35 42.62 42.01 |Δ| 0.91 0.09 0.04 0.07 0.09

[0032] The result of the first dilated mydriatic refraction of the girl's right eye was: -3.50-1.25*170=1.0, SE0=-4.125 D, SP0=-3.50 D; the result of the second dilated mydriatic refraction was: -5.00-1.50*160=1.0, SE=-5.75 D, SP=-5.00D.

[0033] Since 0.02<|ΔLT|=0.04<0.06, 0.05<|ΔK1|=0.07<0.16, 0.07<|ΔK2|=0.09<0.275, and |ΔAD|=0.91>0.09, based on the actual situation of this child and clinical data statistics, the following model is selected to calculate the equivalent spherical lens and spherical power values: SE1=SE0-(1.73±0.44+α+γ)×ΔAL+δ; SP1=SP0-(1.73±0.44+α+γ)×ΔAL+δ.

[0034] Since the child is 8 years old, γ=0.05×8=0.4; in addition, since the follow-up test time is 10 months, the α value is taken as -0.05, δ=0.18×ΔAD=0.0162 D.

[0035] Substitute and calculate SE1=SE0-(1.72+α+γ)×ΔAL+δ=-4.125-(1.72-0.05+0.4)×0.91+0.0162=-5.9925 D; SP1=-3.50-(1.72-0.05+0.4)×0.91+0.126=-5.3675 D.

[0036] The calculated SE1=-5.9925 D, SP1=-5.3675 D, and the errors with the actual experimental light results are both less than 0.5 D.

[0037] Example 3 The right eye of a 7-year-old boy was tested for optometry using the same method as in Example 1. The eye morphology parameters obtained from the two measurements are shown in Table 3 below.

[0038] Table 3 Eye morphological parameters measured before and after AL AD LT <![CDATA[K1]]> <![CDATA[K2]]> first 24.62 3.74 3.62 41.05 42.28 Second time (9 months) 24.84 3.72 3.47 40.91 42.55 |Δ| 0.22 0.02 0.15 0.14 0.27

[0039] The first dilated mydriatic refraction result of the boy's right eye was: -0.50-1.00*175=1.0, SE0=-1.00 D, SP0=-0.50 D; the second dilated mydriatic refraction result was: -1.00-1.00*175=1.0, SE=-1.5 D, SP=-1.00 D.

[0040] Since the child is 7 years old, γ = 0.05 × 7 = 0.35; in addition, since the follow-up test time is 9 months, the α value is -0.05; Since |ΔAD|=0.02<0.03, 0.05<|ΔK1|=0.14<0.16, 0.07<|ΔK2|=0.27<0.275, |ΔLT|=0.15>0.06, the following model is used to calculate the equivalent spherical lens and spherical power value: SE1=SE0-(1.74±0.21+α+γ)×ΔAL+δ, SP1=SP0-(1.74±0.21+α+γ)×ΔAL+δ; among them, δ=0.18×ΔAD+0.25×ΔLT+0.09×(ΔK1 / 3)+0.03×(ΔK2 / 3)=0.048 D.

[0041] After substituting, SE1=-1.00-(1.74-0.05+0.35)×0.22+0.048=-1.4008 D, SP1=-0.50-(1.74-0.05+0.35)×0.22+0.048=-0.9008 D; The calculated results show that SE1=-1.4008 D and SP1=-0.9008 D, and the errors with the actual experimental light results are both less than 0.5 D.

[0042] Example 4 The right eye of an 8-year-old girl was tested for optometry using the same method as in Example 1. The eye morphology parameters obtained from the two measurements are shown in Table 4 below.

[0043] Table 4 Eye morphological parameters measured before and after AL AD LT <![CDATA[K1]]> <![CDATA[K2]]> first 23.73 3.62 3.38 42.79 44.26 Second time (June) 24.93 3.68 3.32 42.85 44.16 |Δ| 0.20 0.06 0.06 0.06 0.09

[0044] The first dilated mydriatic refraction result of the girl's right eye was: -1.00=1.0, SE0=-1.00 D, SP0=-1.00 D; the second dilated mydriatic refraction result was: -1.5=1.0, SE=-1.5 D, SP=-1.5 D.

[0045] Since 0.03<|ΔAD|=0.06<0.09, 0.05<|ΔK1|=0.06<0.16, 0.07<|ΔK2|=0.09<0.275, |ΔLT|=0.06, the following model is used to calculate the equivalent spherical lens and spherical power values, where α is -0.1, γ=0.05×8=0.4, and δ=0.25×ΔLT=0.015 D.

[0046] SE1==-1.00-(1.72-0.1+0.4)×0.2+0.015=-1.389 D; SP1=-1.00-(1.72-0.1+0.4)×0.2+0.015=-1.389 D; After calculation, SE1=-1.389 D, SP1=-1.389 D, and the error with the true experimental light result is less than 0.5 D.

[0047] Example 5 The right eye of a 10-year-old girl was tested for optometry using the same method as in Example 1. The eye morphology parameters obtained from the two measurements are shown in Table 5 below.

[0048] Table 5 Eye morphological parameters measured before and after AL AD LT <![CDATA[K1]]> <![CDATA[K2]]> first 23.18 3.63 3.43 43.30 44.14 Second time (14 months) 24.53 3.68 3.42 43.22 44.37 |Δ| 1.35 0.05 0.01 0.08 0.25

[0049] The first dilated mydriatic refraction result of the girl's right eye was: -0.50-0.50*10=1.0, SE0=-0.75 D, SP0=-0.50 D; the second dilated mydriatic refraction result was: -3.5-0.50*180=1.0, SE=-3.75 D, SP=-3.5D.

[0050] Since 0.03<|ΔAD|=0.05<0.09, 0.05<|ΔK1|=0.08<0.16, 0.07<|ΔK2|=0.25<0.275, |ΔLT|=0.01<0.02, the following model is used to calculate the equivalent spherical lens and spherical power values, where α is 0.05, γ=0.05×10=0.5, and δ=0.25×ΔLT=0.0025 D; SE1=SE0-(1.68+α+γ)×ΔAL-δ=-0.75-(1.70+0.05+0.5)×1.35-0.0025=-3.79; SP1=SP0-(1.68+α+γ)×ΔAL-δ=-0.5-(1.70+0.05+0.5)×1.35-0.0025=-3.54 D; The calculated SE1=-3.79 D, SP1=-3.54 D, and the error with the actual experimental light result is less than 0.5 D.

[0051] Example 6 The right eye of a 7-year-old boy was tested for optometry using the same method as in Example 1. The eye morphology parameters obtained from the two measurements are shown in Table 6 below.

[0052] Table 6 Eye morphological parameters measured before and after AL AD LT <![CDATA[K1]]> <![CDATA[K2]]> first 25.02 3.68 3.19 39.80 41.28 Second time (6 months) 25.20 3.64 3.22 39.98 41.20 |Δ| 0.18 0.04 0.03 0.18 0.08

[0053] The first dilated mydriatic refraction result of the boy's right eye was: -0.50-1.25*175=1.0, SE0=-1.125 D, SP0=-0.50 D; the second dilated mydriatic refraction result was: -1.00-1.25*175=1.0, SE=-1.625 D, SP=-1.00D.

[0054] Since 0.03 < |ΔAD| = 0.04 < 0.09, 0.07 < |ΔK2| = 0.08 < 0.275, 0.02 < |ΔLT| = 0.03 < 0.06, and |ΔK1| = 0.18 > 0.16, the following model is used to calculate the equivalent spherical lens and spherical power values, where α is -0.1, γ = 0.05 × 7 = 0.35, and δ = 0.09 × (ΔK1 / 3) = 0.0054 D. SE1 = SE0 - (1.74 + α + γ) × ΔAL - δ = -1.125 - (1.74 - 0.1 + 0.35) × 0.18 - 0.0054 = -1.4886 D; SP1=SP0-(1.74+α+γ)×ΔAL-δ=-0.50-(1.74-0.1+0.35)×0.18-0.0054=-0.8636D; Calculated SE 1= -1.4814 D, SP1=-0.8636 D, the error with the true experimental light result is less than 0.5 D.

[0055] Example 7 The right eye of an 8-year-old boy was tested for optometry using the same method as in Example 1. The eye morphology parameters obtained from the two measurements are shown in Table 7 below.

[0056] Table 7 Eye morphological parameters measured before and after AL AD LT <![CDATA[K1]]> <![CDATA[K2]]> first 24.27 3.87 3.24 40.89 41.98 Second time (7 months) 24.45 3.94 3.27 40.92 42.12 |Δ| 0.18 0.07 0.03 0.03 0.14

[0057] The result of the first dilated mydriatic refraction of the boy's right eye was: 0=1.0, SE0=0 D, SP0=0 D; the result of the second dilated mydriatic refraction was: -0.50=1.0, SE=-0.5 D, SP=-0.5 D.

[0058] Since 0.03<|ΔAD|=0.07<0.09, 0.07<|ΔK2|=0.14<0.275, 0.02<|ΔLT|=0.03<0.06, and |ΔK1|=0.03<0.05, the following model is used to calculate the equivalent spherical power and spherical power value, where α is -0.1, γ=0.05×8=0.4, and δ=0.09×(ΔK1 / 3)=0.0009 D.

[0059] SE1=SE0-(1.71±0.32+α+γ)×ΔAL+δ=0-(1.72-0.1+0.4)×0.18+0.0009=-0.3627; SP1=SP0-(1.71±0.32+α+γ)×ΔAL+δ=0-(1.72-0.1+0.4)×0.18+0.0009=-0.3627; After calculation, SE1=-0.3627 D, SP1=-0.3627D, and the error with the true experimental light result is less than 0.5 D.

[0060] Example 8 The right eye of an 8-year-old girl was tested for optometry using the same method as in Example 1. The eye morphology parameters obtained from the two measurements are shown in Table 8 below.

[0061] Table 8 Eye morphological parameters measured before and after AL AD LT <![CDATA[K1]]> <![CDATA[K2]]> first 23.77 3.59 3.38 42.62 44.49 Second time (9 months) 23.94 3.67 3.33 42.58 44.21 |Δ| 0.17 0.08 0.05 0.04 0.28

[0062] The first dilated mydriatic refraction result of the girl's right eye was: -1.25-0.50*180=1.0, SE0=-1.5 D, SP0=-1.25 D; the second dilated mydriatic refraction result was: -1.75-0.75*180=1.0, SE=-1.7875 D, SP=-1.75D.

[0063] Since 0.03<|ΔAD|=0.08<0.09, 0.05<|ΔK1|=0.04<0.16, 0.02<|ΔLT|=0.05<0.06, and |ΔK2|=0.28>0.275, the following model is used to calculate the equivalent spherical power and spherical power value, where α is -0.05, γ=0.05×8=0.4, and δ=0.03×(ΔK2 / 3)=0.0028 D.

[0064] SE1=SE0-(1.73±0.21+α+γ)×ΔAL-δ=-1.5-(1.72-0.05+0.4)×0.17-0.0027=-1.8547 D; SP1=SP0-(1.73±0.21+α+γ)×ΔAL-δ=-1.25-(1.72-0.05+0.4)×0.17-0.0027=-1.6047 D; Calculate SE based on parameters 1= -1.8547 D, SP1=-1.6047 D, the error with the true experimental light result is less than 0.5 D.

[0065] Example 9 The right eye of an 8-year-old girl was tested for optometry using the same method as in Example 1. The eye morphology parameters obtained from the two measurements are shown in Table 9 below.

[0066] Table 9 Eye morphological parameters measured before and after AL AD LT <![CDATA[K1]]> <![CDATA[K2]]> first 24.39 3.20 3.62 41.68 42.53 Second time (11 months) 24.79 3.38 3.40 41.72 42.54 |Δ| 0.40 0.18 0.22 0.04 0.01

[0067] The first dilated mydriatic refraction result of the girl's right eye was: -1.75-0.50*170=1.0, SE0=-2.00 D, SP0=-1.75 D; the second dilated mydriatic refraction result was: -2.50-0.50*170=1.0, SE=-2.75 D, SP=-2.50D.

[0068] Since |ΔAD|=0.18, |ΔK1|=0.04<0.05, |ΔK2|=0.01<0.07, and |ΔLT|=0.22, the following model is used to calculate the equivalent spherical lens and spherical power values, where α is 0, γ=0.05×8=0.4, and δ=0.18×ΔAD+0.25×ΔLT+0.09×(ΔK1 / 3)+0.03×(ΔK2 / 3)=0.0887 D.

[0069] SE1=SE0-(1.74±0.21+α+γ)×ΔAL+δ=-2.00-(1.72+0+0.4)×0.40+0.0843=-2.7593 D; SP1=SP0-(1.74±0.21+α+γ)×ΔAL+δ=-1.75-(1.72+0+0.4)×0.40+0.0843=-2.5093 D.

[0070] Calculate SE based on parameters 1= -2.7593 D, SP1=-2.5093 D, the error with the true experimental light result is less than 0.5 D.

Claims

1. A method for rapidly calculating equivalent spherical power and spherical power values ​​based on eyeball morphological parameters, characterized in that: The following steps are involved: S1 performs a first measurement of the morphological parameters of the eyeball, wherein the morphological parameters of the eyeball include: anterior chamber depth AD, axial length AL, lens thickness LT, anterior corneal surface K1 value, and anterior corneal surface K2 value; S2 dilates the eyeball, and after the pupil is completely dilated, the first optometry test is performed to obtain the initial spherical equivalent power and spherical power values, which are recorded as SE0 and SP0; S3 performs a second measurement of the morphological parameters of the eyeball measured in S1; S4 calculates the change of each parameter based on the measurement results of the eyeball morphological parameters twice, and brings it into the fast calculation model of the equivalent spherical power and the spherical power value to obtain the first predicted equivalent spherical power and the spherical power value SE1 and SP1; The fast calculation model is: SE1=SE0-[(1.72±0.65)+α+γ]×ΔAL±δ, SP1=SP0-[(1.72±0.65)+α+γ]×ΔAL±δ; Among them, α is the follow-up error, and the value range of α is between -0.15 and 0.3; γ is the age-related coefficient, γ=0.05×age value; ΔAL is the change in axial length, ΔAL=AD 第2次测定值 -AD 第1次测定值 , δ is the error coefficient related to the eye morphological parameters, and the value of δ depends on the variation of each measured eye morphological parameter; S5: Within 4 years of the first dilated mydriatic refraction, the ocular morphological parameters are measured for the third, fourth, and nth time, where n is an integer greater than 4. Based on the first measured ocular morphological parameters, the change between the two measured morphological parameters is calculated and incorporated into the following calculation model to quickly and accurately calculate the equivalent spherical power and spherical power value at each test; The calculation model of the equivalent spherical power and spherical power value predicted for the nth time is: SE n =SE0-[(1.72±0.65)+α+γ]×ΔAL±δ, SP n =SP0-[(1.72±0.65)+α+γ]×ΔAL±δ, where α is the follow-up error, and the value range of α is between -0.15 and 0.3; γ is the age-related coefficient, γ=0.05×age value; ΔAL is the change in axial length, ΔAL=AD 第n次测定值 -AD 第1次测定值 , δ is the error coefficient related to the eye morphological parameters, and the value of δ depends on the change of each measured eye morphological parameter.

2. The method according to claim 1, wherein For the mydriasis described in S2, for children under 6 years old undergoing initial optometry, 1.0% atropine eye ointment should be used for mydriasis 2 to 3 times a day for 3 to 5 days; For children over 6 years old undergoing their first eye examination, use 1.0% cyclopentanone eye drops to dilate the pupil. First, apply a topical anesthetic once, then apply 1.0% cyclopentanone eye drops 2 to 3 minutes later. Use once every 5 minutes for a total of 3 times.

3. The method according to claim 1, wherein In S2, whether the pupil is completely dilated is determined by the following method: When atropine eye ointment is applied, the pupil diameter dilates to ≥6 mm; Or after using topical anesthetics in the eyes, the pupil's direct light reflex disappears or is significantly weakened; Alternatively, the iris can be observed to be completely relaxed and without wrinkles by slit lamp observation; Alternatively, if two eye examinations are performed with an interval of 10-15 minutes and the difference in the results is ≤0.5×spherical value / cylindrical value, the pupil is considered to be completely dilated.

4. The method according to claim 1, wherein In S5, when the changes in the eyeball morphological parameters between the two previous measurements are within the following ranges: 0.02 < |ΔLT| < 0.06, 0.05 < |ΔK1| < 0.16, 0.07 < |ΔK2| < 0.275, the equivalent spherical power and spherical power values ​​are calculated based on the change in the anterior chamber depth ΔAD. The fast calculation model for the equivalent spherical power and spherical power values ​​predicted for the nth time is: When 0.03 < |ΔAD| < 0.09, SE n = SE0 - (1.72 ± 0.61 + α + γ) × ΔAL, SP n = SP0 - (1.72 ± 0.61 + α + γ) × ΔAL; When |ΔAD| ≥ 0.09, SE n = SE0 - (1.73 ± 0.44 + α + γ) × ΔAL + δ, SP n = SP0 - (1.73 ± 0.44 + α + γ) × ΔAL + δ; When |ΔAD| ≤ 0.03, SE n = SE0 - (1.73 ± 0.44 + α + γ) × ΔAL - δ, SP n = SP0 - (1.73 ± 0.44 + α + γ) × ΔAL - δ; In the model described, ΔAD=AD 第n次测定值 -AD 第1次测定值 , ΔLT=LT 第n次测定值 -LT 第1次测定值 , δ=(0.02±0.16)×ΔAD.

5. The method according to claim 1, wherein In S5, when the changes in the eyeball morphological parameters between the two previous measurements are within the following ranges: 0.03 < |ΔAD| < 0.09, 0.05 < |ΔK1| < 0.16, 0.07 < |ΔK2| < 0.275, the equivalent spherical power and spherical power values ​​are calculated according to the change in the lens thickness ΔLT. The fast calculation model for the equivalent spherical power and spherical power values ​​predicted for the nth time is: |ΔLT|≥0.06,SE n =SE0-(1.70±0.12+α+γ)×ΔAL+δ,SP n =SP0-(1.70±0.12+α+γ)×ΔAL+δ; When |ΔLT| ≤ 0.02, SE n = SE0 - (1.70 ± 0.12 + α + γ) × ΔAL - δ, SP n = SP0 - (1.70 ± 0.12 + α + γ) × ΔAL - δ; In the model described, ΔLT=LT 第n次测定值 -LT 第1次测定值 , ΔAL=AL 第n次测定值 -AL 第1次测定值 ,δ=(0.12±0.13)×ΔLT.

6. The method according to claim 1, wherein In S5, when the change in the eyeball morphological parameters between the two measurements is within the following ranges: 0.03 < |ΔAD| < 0.09, 0.02 < |ΔLT| < 0.06, 0.07 < |ΔK2| < 0.275, the equivalent spherical power and the spherical power value are calculated according to the change in the K1 value of the anterior corneal surface ΔK1. The fast calculation model for the equivalent spherical power and the spherical power value predicted for the nth time is: When |ΔK1|≥0.16, SE n = SE0 - (1.71 ± 0.32 + α + γ) × ΔAL - δ, SP n = SP0 - (1.71 ± 0.32 + α + γ) × ΔAL - δ; When |ΔK1| ≤ 0.05, SE n = SE0 - (1.71 ± 0.32 + α + γ) × ΔAL + δ, SP n = SP0 - (1.71 ± 0.32 + α + γ) × ΔAL + δ; In the model described above, ΔK1=K 1第n次测定值 -K 1第1次测定值 , ΔAL=AL 第n次测定值 -AL 第1次测定值 , δ=(0.07±0.02)×(ΔK1 / 3).

7. The method according to claim 1, wherein In S5, when the change in the eyeball morphological parameters between the two measurements is within the following range: 0.03 < |ΔAD| < 0.09, 0.02 < |ΔLT| < 0.06, |ΔK1| ≤ 0.05, the equivalent spherical power and the spherical power value are calculated according to the change in the K2 value of the anterior corneal surface ΔK2. The fast calculation model for the equivalent spherical power and the spherical power value predicted for the nth time is: |ΔK2|≥0.275,SE n =SE0-(1.73±0.21+α+γ)×ΔAL-δ,SP n =SP0-(1.73±0.21+α+γ)×ΔAL-δ; |ΔK2|≤0.07,SE n =SE0-(1.73±0.21+α+γ)×ΔAL+δ,SP n =SP0-(1.73±0.21+α+γ)×ΔAL+δ; In the model described above, ΔK2=K 2第n次测定值 -K 2第1次测定值 , ΔAL=AL 第n次测定值 -AL 第1次测定值 , δ=(0.01±0.02)×(ΔK2 / 3).

8. The method according to claim 1, wherein In S5, when the changes in the eyeball morphological parameters measured between the two previous measurements are not within the above-listed ranges, the equivalent spherical power and the spherical power values ​​are calculated based on the change in the anterior chamber depth ΔAD, the change in the lens thickness ΔLT, the change in the K1 value of the anterior corneal surface ΔK1, and the change in the K2 value of the anterior corneal surface ΔK2. The fast calculation model for the equivalent spherical power and the spherical power values ​​predicted for the nth time is: SE n =SE0-(1.74±0.21+α+γ)×ΔAL+δ,SP n =SP0-(1.74±0.21+α+γ)×ΔAL+δ; In the model described, δ=(0.02±0.16)×ΔAD+(0.12±0.13)×ΔLT+(0.07±0.02)×(ΔK1 / 3)+(0.01±0.02)×(ΔK2 / 3); ΔK1=K 1第n次测定值 -K 1第1次测定值 ,ΔK2=K 2第n次测定值 -K 2第1次测定值 ,ΔAD=AD 第n次测定值 -AD 第1次测定值 ,ΔLT=LT 第n次测定值 -LT 第1次测定值 。