CN110367925B - Subjective and objective integrated diagnostic optometry device and optometry method - Google Patents
Subjective and objective integrated diagnostic optometry device and optometry method Download PDFInfo
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/0016—Operational features thereof
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/0075—Apparatus for testing the eyes; Instruments for examining the eyes provided with adjusting devices, e.g. operated by control lever
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/02—Subjective types, i.e. testing apparatus requiring the active assistance of the patient
- A61B3/028—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing visual acuity; for determination of refraction, e.g. phoropters
- A61B3/032—Devices for presenting test symbols or characters, e.g. test chart projectors
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/103—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for determining refraction, e.g. refractometers, skiascopes
Abstract
A subjective and objective integrated diagnostic optometry device and an optometry method comprise the following steps: the system comprises an eye refraction objective measurement subsystem, an eye refraction correction subsystem, an eyeball positioning subsystem, a subjective visual function test subsystem and a visual function diagnosis subsystem. The eye refraction objective measurement subsystem is used for objective measurement of eye refraction; an eye refractive correction subsystem for correcting an eye refractive error; the eyeball positioning subsystem is used for positioning eyeballs; the subjective visual function testing subsystem is used for subjective visual function testing; the visual function diagnosis subsystem is used for collecting subjective test information of the testee and giving a diagnosis result; the device has the functions of rapid measurement and screening of human eye refraction and preliminary screening of whether the human eye is ill (except ametropia), and can be used for clinical diagnosis of ophthalmology, myopia screening of people, ametropia monitoring and the like.
Description
Technical Field
The invention relates to the technical field of optical measurement, in particular to an subjective and objective integrated diagnostic optometry device and an optometry method.
Background
The information received by human beings is 83% obtained by eyes, and the health of eyes is important because the bad eyes can influence the study, work and life of people. In 2018, a research report of the world health organization shows that Chinese myopia patients reach 6 hundred million, and the myopia rate of teenagers is the first in the world and still continuously trends to rise. According to the current development trend of myopia, most teenagers are early-onset myopia and need to be discovered and treated as soon as possible, so that the child vision screening and the refractive data monitoring are very important.
The eyes are uncomfortable, the doctor visits the hospital, and the clinician needs to make a diagnosis through examination. One of the major symptoms of eye disease is vision deterioration, so vision examination is a routine examination in ophthalmic clinic. At present, the visual acuity test is carried out clinically by adopting an eye chart, only results of whether the vision is normal can be given, and the judgment of ametropia or other eye diseases cannot be made, so that the clinical triage of ophthalmology is inconvenient.
Aiming at the requirements of rapid vision screening, ametropia monitoring and ophthalmic clinical vision screening triage of teenagers with myopia, the invention provides an objective and subjective integrated diagnostic optometry device and an optometry method, which have the functions of rapid eye ametropia screening and preliminary screening on whether a human eye is ill (except ametropia), and can be used for eye ametropia screening, ametropia data monitoring and ophthalmic clinical triage.
Disclosure of Invention
The technical problem solved by the invention is as follows: the subjective and objective integrated diagnostic optometry device and the optometry method have the functions of quickly screening the ametropia of the human eyes and preliminarily screening whether the human eyes are ill (except for ametropia), and can be used for the ametropia screening and the clinical triage of ophthalmology.
Therefore, the invention firstly provides an objective and subjective integrated diagnostic optometry device, which comprises a human eye refractive objective measurement subsystem, a human eye refractive correction subsystem, an eyeball positioning subsystem, a subjective visual function test subsystem and a visual function diagnosis subsystem; the eye refraction objective measurement subsystem is used for objective measurement of eye refraction; the human eye refractive correction subsystem comprises an internal focusing device and a rotatable cylindrical mirror pair and is used for correcting human eye ametropia; the eyeball positioning subsystem comprises a pupil imaging device and is used for positioning eyeballs; the subjective visual function testing subsystem comprises a visual target objective lens and a visual target display device and is used for subjective visual function testing; and the visual function diagnosis subsystem is used for collecting subjective test information of the detected person and giving a diagnosis result.
Preferably, the subjective and objective integrated diagnostic optometry device can adopt a single-path structure to realize monocular diagnostic optometry and can also adopt a double-path structure to realize binocular synchronous diagnostic optometry.
Further preferably, said human eye refractive objective measurement subsystem principle may be selected from wavefront measurement techniques, optometry techniques, bar-grid focusing optometry techniques, scheiner disc optometry techniques and blade measurement optometry techniques.
Further preferably, the wavefront measuring technique is selected from a hartmann wavefront sensor based on a microlens array, a hartmann wavefront sensor based on a microprism array, a curvature wavefront sensor, a pyramid wavefront sensor.
Further preferably, the cylindrical mirror pair is selected from a plano-concave/plano-convex cylindrical mirror pair, a plano-concave/plano-concave cylindrical mirror pair, and a plano-convex/plano-convex cylindrical mirror pair, which have the same or different power levels.
Further preferably, the optotype display device is selected from a CRT display, a commercial projector, a liquid crystal display, a plasma display, an electroluminescence display, an organic light emitting display, a projection display device, and a printed visual chart.
Preferably, the human eye refractive objective measurement subsystem comprises a first relay telescope or a third relay telescope, a cylindrical mirror pair, a first spectroscope, a second relay telescope, a wavefront sensor, a second spectroscope, a collimating objective and a near-infrared beacon light source; the cylindrical mirror pair is arranged between the first relay telescope and the first spectroscope, or the cylindrical mirror pair is arranged between the third relay telescope and the first spectroscope, the cylindrical mirror pair is coaxial with the optical path of the first relay telescope or the third relay telescope, the original optical path of the first spectroscope is coaxial with the optical path of the second relay telescope, the optical path of the first spectroscope is coaxial with the original optical path of the second spectroscope, the optical path of the second spectroscope is coaxial with the optical path of the collimating objective lens, the near-infrared beacon light source is arranged at the rear position of the collimating objective lens, and the wavefront sensor is arranged at the rear position of the second relay telescope.
Further preferably, the human refractive correction subsystem comprises a pair of cylindrical mirrors; the cylindrical mirror pair is arranged at the conjugate position of human eyes, the steering angle of a single cylindrical mirror in the cylindrical mirror pair is adjusted, the astigmatism of the human eyes is continuously corrected, and the distance between the lens in the first relay telescope and the third relay telescope is adjusted, so that the defocus is continuously corrected.
Further preferably, the visual function diagnosis subsystem is connected to the visual target display device in communication, and the visual function diagnosis subsystem performs determination based on the judgment of the subject.
The invention provides a subjective and objective integrated diagnostic optometry method, which comprises the following steps:
1. starting a near-infrared beacon light source, wherein the near-infrared beacon light source emits light, the light is collimated by a collimating objective lens, reflected by a second spectroscope and a first spectroscope, and then enters human eyes after passing through a cylindrical mirror pair and a first relay telescope or a third relay telescope;
2. the light reflected by the fundus of the human eye enters the wavefront sensor through the first relay telescope or the third relay telescope, the cylindrical lens pair, the first spectroscope and the second relay telescope, and the refractive error (defocusing, astigmatism and astigmatism axial direction) of the human eye is objectively measured;
3. compensating the defocusing of the human eyes by a human eye defocusing correction formula and an internal focusing mode according to the measured refractive error of the human eyes; respectively rotating the single cylindrical lens in the cylindrical lens pair around the optical axis according to the measured human eye refractive error, and compensating the human eye astigmatism through a human eye astigmatism correction formula and a single cylindrical lens rotation mode;
4. after the refractive error compensation of the human eye is finished, the sighting target display device displays the sighting target of a specific type, and the human eye observes and judges the specific sighting target displayed on the sighting target display device through the first relay telescope or the third relay telescope, the cylindrical mirror pair, the first spectroscope, the second spectroscope, the reflector and the sighting target objective lens;
5. the visual function diagnosis subsystem diagnoses according to the judgment of the examined person, and if the examined person judges that the judgment is correct, the examined eye is considered to have ametropia only and a refraction measured value is given; if the examinee judges wrongly, the examined eye may have other eye diseases besides ametropia, and needs to be clearly determined by matching with other ophthalmic examinations (such as fundus oculi and the like).
Preferably, the human eye defocus correction formula is as follows:
wherein D is correctable defocus, f 1 、f 2 The focal lengths of the two lenses in the first relay telescope are respectively, d is the distance between the two convex lenses in the first relay telescope in the optical axis direction, and the continuous correction of the defocusing of the human eye is realized by changing the distance between the two image lenses in the first relay telescope in the optical axis direction.
Preferably, the formula for correcting astigmatism of human eyes is as follows:
C＝2F c cos(a 1 -a 2 )
where C and φ are the correctable astigmatism and axial direction, respectively, fc is the astigmatism of a single cylindrical mirror in the cylindrical mirror pair, a 1 And a 2 Is the astigmatic axis direction of the two cylindrical mirrors; continuous correction of astigmatism of the human eye is achieved by rotating the single cylindrical mirrors in the cylindrical mirror pair respectively.
Compared with the prior art, the invention has the beneficial effects that:
the diopter of the human eyes is objectively measured by adopting an objective refraction measuring technology, so that the inner focusing device and the rotating cylindrical mirror pair are guided to respectively correct the defocusing and the astigmatism of the human eyes. After the refractive correction of the human eyes is finished, the tested person observes the built-in specific sighting target through the device and judges, if the judgment is correct, the tested eye is considered to have ametropia only and a refractive measured value is given; if the judgment is wrong, the eye to be detected may have other eye diseases besides refraction, and other eye tests (such as fundus oculi pictures and the like) need to be matched for making a clear determination, so that whether a patient has other eye diseases or not can be quickly judged, the test flow is saved, and the triage speed is increased.
Drawings
Fig. 1 is a schematic diagram of an embodiment 1 of the objective-subjective integrated diagnostic optometry apparatus based on wavefront measurement technology in accordance with the present invention.
Fig. 2 is a schematic diagram of an embodiment 2 of the subjective and objective integrated diagnostic optometry device based on the wavefront measurement technology.
FIG. 3 is a schematic diagram of the subjective and objective integrated diagnostic optometry apparatus of the present invention during binocular optometry;
the labels in the figure are: 1. a human eye; 2. a pupil imaging device; 3. a first relay telescope; 4. a cylindrical mirror pair; 5. a first beam splitter; 6. a second relay telescope; 7. a wavefront sensor; 8. a visual target display device; 9. a near-infrared beacon light source; 10. a collimating objective lens; 11. a sighting target objective lens; 12. a mirror; 13. a second spectroscope; 14. a visual function diagnostic device; 15. a first reflector; 16. a first lens; 17. a second reflector; 18. a third reflector; 19. a second lens; 20. a fourth mirror.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. It should be emphasized that the following description is merely exemplary in nature and is in no way intended to limit the scope of the invention or its applications. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
Example 1
As shown in fig. 1, a subjective and objective integrated diagnostic optometry device based on a wavefront measurement technology comprises a pupil imaging device 2, a first relay telescope 3, a cylindrical mirror pair 4, a first spectroscope 5, a second relay telescope 6, a wavefront sensor 7, a sighting target display device 8, a near-infrared beacon light source 9, a collimator objective 10, a sighting target objective 11, a reflector 12, a second spectroscope 13 and a visual function diagnostic device 14.
The light emitted by the near-infrared beacon light source 9 is collimated by the collimating objective lens 10, reflected by the second beam splitter 13 and the first beam splitter 5, and enters the human eye 1 after passing through the cylindrical mirror pair 4 and the first relay telescope 3; the light reflected by the fundus of the human eye 1 enters a wavefront sensor 7 through a first relay telescope 3, a cylindrical mirror pair 4, a first spectroscope 5 and a second relay telescope 6 to objectively measure the refractive error (defocusing, astigmatism and astigmatism axial direction) of the human eye 1; according to the measured refraction error of the human eyes 1, an internal focusing mode is adopted to compensate the defocusing of the human eyes 1; according to the measured refractive error of the human eyes 1, single cylindrical mirrors in the cylindrical mirror pair 4 are respectively rotated around the optical axis, and the astigmatism of the human eyes 1 is compensated by adopting a cylindrical mirror synthesis mode. After the compensation of the refraction error of the human eyes 1 is finished, the sighting target display device 8 displays the sighting target of a specific type, and the human eyes 1 observe and judge the specific sighting target displayed on the sighting target display device 8 through the first relay telescope 3, the cylindrical mirror pair 4, the first spectroscope 5, the second spectroscope 13, the reflecting mirror 12 and the sighting target objective lens 11; the visual function diagnosis subsystem diagnoses according to the judgment of the examined person, and if the examined person judges that the judgment is correct, the examined eye is considered to have ametropia only and a refraction measured value is given; if the examinee judges wrongly, the examined eye may have other eye diseases besides refraction, and needs to be clearly determined in cooperation with other ophthalmic examinations (such as fundus oculi and the like).
The human eye 1 defocus correction formula is as follows:
d is correctable defocusing, f and f are respectively the focal lengths of the two lenses in the relay telescope, and D is the distance between the two lenses in the relay telescope in the direction of the optical axis. As can be known from formula 1, by changing the distance between the two lenses in the relay telescope on the optical axis, the continuous correction of the defocus of the human eye 1 can be realized.
The formula for correcting astigmatism in the human eye 1 is as follows:
C＝2F c cos(a 1 -a 2 ) (2)
wherein C and phi are respectively the astigmatism size and the axial direction which can be corrected, fc is the astigmatism size of a single cylindrical mirror in the cylindrical mirror pair 4, and a are the astigmatism axial directions of two cylindrical mirrors. As can be seen from formula 2, by rotating the single cylindrical mirrors in the cylindrical mirror pair 4, respectively, continuous correction of astigmatism of the human eye 1 can be achieved.
Example 2
As shown in fig. 2, an objective and subjective integrated diagnostic optometry apparatus based on wavefront measurement technology includes a pupil imaging device 2, a third relay telescope, a cylindrical mirror pair 4, a first spectroscope 5, a second relay telescope 6, a wavefront sensor 7, a sighting target display device 8, a near-infrared beacon light source 9, a collimating objective 10, a sighting target objective 11, a reflecting mirror 12, a second spectroscope 13 and a visual function diagnostic device 14; wherein the third relay telescope comprises a first reflector 15, a first lens 16, a second reflector 17, a third reflector 18, a second lens 19 and a fourth reflector 20.
The light emitted by the near-infrared beacon light source 9 is collimated by the collimating objective lens 10, reflected by the second beam splitter 13 and the first beam splitter 5, and enters the human eyes 1 through the cylindrical mirror pair 4 and the inner focusing device 3; the light reflected by the eyeground of the human eye 1 passes through the third relay telescope, the cylindrical lens pair 4, the first spectroscope 5 and the second relay telescope 6 and enters the wavefront sensor 7 to objectively measure the human eye refractive error (defocusing, astigmatism and astigmatism axial direction); according to the measured refractive error of the human eye, the second reflector 17 and the third reflector 18 are synchronously moved along the optical axis, and the defocusing of the human eye is compensated by adopting an inner focusing mode; and respectively rotating the single cylindrical mirrors in the cylindrical mirror pair 4 around the optical axis according to the measured refractive error of the human eyes, and compensating the astigmatism of the human eyes by adopting a cylindrical mirror synthesis mode. After the refractive error compensation of the human eye is completed, the sighting target display device 8 displays the sighting target of a specific type, and the human eye observes and judges the specific sighting target displayed on the sighting target display device 8 through the third relay telescope, the cylindrical lens pair 4, the first spectroscope 5, the second spectroscope 13, the reflector 12 and the sighting target objective lens 11; the visual function diagnosis subsystem 14 carries out diagnosis according to the judgment of the examinee, and if the examinee judges the judgment is correct, the examinee considers that only ametropia exists in the eye to be examined and gives a measured value of the ametropia; if the examinee judges wrongly, the examined eye may have other eye diseases besides refraction, and needs to be clearly determined in cooperation with other ophthalmic examinations (such as fundus oculi and the like).
In example 2, the human eye astigmatism is corrected in the same manner as in example 1. The correction of the defocusing of the human eyes is realized by a reflection type internal focusing device. The device can also realize continuous correction of the human eye defocusing. Differs from example 1 in that f in formula 1 1 、f 2 And d are the focal lengths of two of the first lens 16 and the second lens 19, respectively, and the distance therebetween.
The invention has thus been described with reference to the preferred embodiments. It should be understood by those skilled in the art that various other changes, substitutions, and additions may be made without departing from the spirit and scope of the invention. The scope of the invention is therefore not to be restricted by the specific embodiments described above, but only by the appended claims.
Claims (7)
1. The utility model provides a diagnostic optometry device of subjective and objective integral type which characterized in that: the subjective and objective integrated diagnostic optometry device comprises an eye refractive objective measurement subsystem, an eye refractive correction subsystem, an eyeball positioning subsystem, a subjective visual function test subsystem and a visual function diagnosis subsystem; the human eye refraction objective measurement subsystem is used for objective measurement of human eye refraction and comprises a first relay telescope or a third relay telescope, a cylindrical mirror pair, a first spectroscope, a second relay telescope, a wavefront sensor, a second spectroscope, a collimating mirror and a near-infrared beacon light source; the cylindrical mirror pair is arranged at the conjugate position of human eyes; the first relay telescope comprises two lenses; the third relay telescope comprises a first reflector, a first lens, a second reflector, a third reflector, a second lens and a fourth reflector; the human eye refractive correction subsystem is used for correcting human eye ametropia and comprises an internal focusing device and a cylindrical lens pair, wherein the internal focusing device comprises a first relay telescope or a third relay telescope; the eyeball positioning subsystem is used for positioning eyeballs and comprises a pupil imaging device; the subjective visual function testing subsystem is used for subjective visual function testing and comprises a first relay telescope or a third relay telescope, a cylindrical mirror pair, a first spectroscope, a second spectroscope, a reflector, a sighting target objective and a sighting target display device; the visual function diagnosis subsystem is in communication connection with the visual target display device and is used for collecting subjective test information of a detected person and giving a diagnosis result; the human eye refraction objective measuring subsystem and the main viewing function testing subsystem share part of optical devices; the cylindrical mirror pair of the refractive correction subsystem and the first relay telescope are both positioned in the common optical path of the human eye refractive objective measuring subsystem and the subjective viewing function testing subsystem, or the cylindrical mirror pair of the refractive correction subsystem and the third relay telescope are both positioned in the common optical path of the human eye refractive objective measuring subsystem and the subjective viewing function testing subsystem; the subjective and objective integrated diagnostic optometry device performs optometry through the following steps:
1. the near-infrared beacon light source is started, emits light, is collimated by the collimating objective lens, is reflected by the second spectroscope and the first spectroscope, penetrates through the cylindrical lens pair, and enters human eyes through the first relay telescope or the third relay telescope;
2. the light reflected by the fundus of the human eye enters the wavefront sensor through the first relay telescope or the third relay telescope, the cylindrical mirror pair, the first spectroscope and the second relay telescope to objectively measure the refractive error of the human eye;
3. compensating the human eye defocusing through a human eye defocusing correction formula and an internal focusing mode according to the measured human eye refractive error;
the human eye defocus correction formula is as follows: d = (D-f) 1 -f 2 )/f 1 f 2 Wherein D is correctable defocus, f 1 、f 2 The focal lengths of the two lenses in the first relay telescope are respectively, and d is the distance between the two lenses in the first relay telescope in the direction of the optical axis; or, f 1 、f 2 The focal lengths of the first lens and the second lens in the third relay telescope are respectively, and d is the distance between the first lens and the second lens in the optical axis direction; the continuous correction of the defocusing of the human eyes is realized by changing the distance between the two lenses in the first relay telescope or the third relay telescope on the optical axis;
respectively rotating a single cylindrical mirror in the cylindrical mirror pair around the optical axis to compensate the astigmatism of human eyes according to the measured refractive error of the human eyes;
the formula for correcting human eye astigmatism is as follows: c =2F c cos(a 1 -a 2 ), φ=(a 1 +a 2 )/2，
Wherein C and phi are respectively the astigmatism which can be corrected and the axial direction, fc is the astigmatism of a single cylindrical lens in the cylindrical lens pair, a 1 And a 2 Is the astigmatic axial direction of the two cylindrical mirrors; continuous correction of astigmatism of the human eye is realized by respectively rotating the single cylindrical mirrors in the cylindrical mirror pair;
4. after the compensation of the refractive error of the human eye is finished, the sighting target display device displays the sighting target of a specific type, and the human eye observes and judges the specific sighting target displayed on the sighting target display device through the first relay telescope or the third relay telescope, the cylindrical mirror pair, the first spectroscope, the second spectroscope, the reflecting mirror and the sighting target objective lens;
5. the visual function diagnosis subsystem carries out diagnosis according to the judgment of the testee.
2. The subjective and objective integrated diagnostic optometric apparatus of claim 1, wherein: the device adopts a single-path structure to realize monocular diagnostic optometry, or adopts a double-path structure to realize binocular diagnostic optometry.
3. The subjective and objective integrated diagnostic optometric apparatus of claim 1, wherein: the realization of the human eye refraction objective measurement subsystem is selected from a wavefront measurement technology, an optometry technology, a bar-grating focusing optometry technology, a Scheiner disc optometry technology and a blade measurement optometry technology.
4. The subjective and objective integrated diagnostic optometric apparatus of claim 3, wherein: the wavefront measuring technique is selected from a Hartmann wavefront sensor based on a micro lens array, a Hartmann wavefront sensor based on a micro prism array, a curvature wavefront sensor and a pyramid wavefront sensor.
5. The subjective and objective integrated diagnostic optometric apparatus of claim 1, wherein: the cylindrical mirror is selected from a plano-concave/plano-convex cylindrical mirror pair, a plano-concave/plano-concave cylindrical mirror pair, and a plano-convex/plano-convex cylindrical mirror pair, which have the same or different focal powers.
6. The subjective and objective integrated diagnostic optometric apparatus of claim 1, wherein: in the human eye refractive objective measurement subsystem, the cylindrical mirror pair is arranged between the first relay telescope and the first spectroscope, or the cylindrical mirror pair is arranged between the third relay telescope and the first spectroscope; the cylindrical mirror pair is coaxial with the optical path of the first relay telescope or the third relay telescope, the primary optical path of the first spectroscope is coaxial with the optical path of the second relay telescope, the light splitting path of the first spectroscope is coaxial with the primary optical path of the second spectroscope, the light splitting path of the second spectroscope is coaxial with the optical path of the collimating objective lens, the near-infrared beacon light source is arranged at the rear position of the collimating objective lens, and the wavefront sensor is arranged at the rear position of the second relay telescope.
7. The subjective and objective integrated diagnostic optometric apparatus of claim 1, wherein: the visual target display device is selected from CRT display, commercial projector, liquid crystal display, plasma display, electroluminescent display, organic light emitting display, projection display device, and printed visual chart.
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| PCT/CN2020/075652 WO2021031538A1 (en) | 2019-08-22 | 2020-02-18 | Subjective and objective integrated precise optometry device, and optometry method |
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| CN112754419A (en) * | 2021-01-08 | 2021-05-07 | 瑞尔明康(杭州)视光科技有限公司 | Visual perception learning training instrument and visual perception learning training system |
| CN113208554A (en) * | 2021-05-14 | 2021-08-06 | 长兴爱之瞳医疗科技有限公司 | Optometry device with defocusing and astigmatism accurate correction functions and optometry method |
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| CN110367925A (en) | 2019-10-25 |
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