CN113208554A - Optometry device with defocusing and astigmatism accurate correction functions and optometry method - Google Patents

Optometry device with defocusing and astigmatism accurate correction functions and optometry method Download PDF

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CN113208554A
CN113208554A CN202110525066.2A CN202110525066A CN113208554A CN 113208554 A CN113208554 A CN 113208554A CN 202110525066 A CN202110525066 A CN 202110525066A CN 113208554 A CN113208554 A CN 113208554A
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astigmatism
human eye
lens
optometry
defocusing
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何良义
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Zhejiang Aizhitong Medical Technology Co ltd
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    • 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
    • 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
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    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
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    • A61B3/0041—Operational features thereof characterised by display arrangements
    • 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
    • A—HUMAN NECESSITIES
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    • 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
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    • 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
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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
    • A61B3/036—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing visual acuity; for determination of refraction, e.g. phoropters for testing astigmatism

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Abstract

The invention discloses an optometry device with defocusing and astigmatism accurate correction functions and an optometry method, wherein the device consists of a left eye light path and a right eye light path; the monocular optical path comprises a focusing subsystem, an astigmatism compensation subsystem, an eyeball positioning subsystem and a subjective visual function testing subsystem. The device has the functions of monocular and binocular positioning, continuous subjective refraction, pupil distance measurement, monocular and binocular vision function measurement (including but not limited to vision and stereoscopic vision) and the like, and can realize subjective accurate refraction of monocular and binocular; can be used for optometry lens matching, ophthalmology clinical triage, crowd ametropia screening and monitoring and the like.

Description

Optometry device with defocusing and astigmatism accurate correction functions and optometry method
Technical Field
The invention relates to the technical field of optical measurement, in particular to an optometry device with defocusing and astigmatism accurate correction functions and an optometry method.
Background
Uncorrected refractive errors (including myopia, hyperopia and astigmatism), and non-surgically treated cataracts are the two leading causes of vision impairment (see literature [ J ]. Ophthematology 2016; 123 (5): 1036) 1042. The critical point in performing refractive correction for a patient is the accurate refraction of the human eye for the degree of refractive error to give the best corrective prescription.
Currently, the optometry procedure includes two steps of objective optometry and subjective optometry. Methods for objective refraction include shadowgraph and optometry and objective measurement of refractive errors of patients by means of professional equipment such as computer optometry, eye aberrometers and the like. On the basis, the subjective refraction is carried out by utilizing the trial frame insert or the comprehensive refractometer. Since objective refraction does not involve subjective feedback from the subject, the test results are often used as reference. The accuracy and repeatability of subjective refraction depends on the degree of fitting of the examinee, the level of the examinee and clinical experience to a great extent, so that the quality of the corrective prescription obtained based on the existing subjective refraction method is uneven. More importantly, the prior trial frame insert or the prior comprehensive optometry instrument adopts trial lenses with discrete degrees (step length of 0.25D) to carry out subjective optometry, has adjustment errors and cannot realize continuous and accurate optometry on the ametropia of human eyes.
The accuracy of the diopter is related to the visual quality and the wearing comfort, and for teenagers, whether myopia can be caused or not is also related. Since a series of studies have shown that over-correction or under-correction can lead to accelerated myopia progression, foot correction is the best option for juvenile myopia glasses. The red-green double-color test is an important method for searching a ball lens foot correction point and avoiding under correction and over correction. In the field of optometry, bicolor testing is an important step of subjective optometry, and textbooks on qualification tests of optometrists of various countries classify the same as a method for determining the sphere power and the most positive optimal vision (MPMVA). Because the prior trial frame insert or the comprehensive optometry instrument adopts trial lenses with discrete degrees (step length of 0.25D) to carry out red-green double-color test, and the probability that the degree of the spherical lenses of human eyes is integral multiple of 0.25D or the difference of the spherical lenses below 0.25D cannot be distinguished is very low, most myopia groups are difficult to reach red-green balance, and the most myopia groups are in under-correction or over-correction states.
The invention provides a subjective optometry device with defocusing and astigmatism accurate correction functions, aiming at the problem that the existing subjective optometry process adopts a test lens with discrete degrees (step length of 0.25D) and cannot meet the accurate optometry of most of myopia groups, so that under-correction and over-correction are caused. The focusing subsystem in the device can realize continuous adjustment of defocusing, and the astigmatism compensation subsystem can realize continuous adjustment of astigmatism. The device can solve the problem that the degree of the test lens is discontinuous and has a rounding error in the existing subjective optometry process, improves the precision of subjective optometry, and is convenient for integration of a main optometry system and an objective optometry system.
Disclosure of Invention
The invention aims to provide an optometry device with defocusing and astigmatism accurate correction functions and an optometry method aiming at the defects, and solves the problems of under-correction and over-correction caused by chemical error due to discontinuous test lens power in the existing subjective optometry means.
The scheme is realized as follows:
the invention firstly provides a subjective optometry device with defocusing and astigmatic accurate correction functions, which consists of a left eye light path and a right eye light path; the monocular optical path comprises a focusing subsystem, an astigmatism compensation subsystem, an eyeball positioning subsystem and a subjective visual function testing subsystem; the focusing subsystem is used for continuously and accurately correcting the defocusing of human eyes; an astigmatism compensation subsystem for continuous accurate correction of astigmatism of a human eye; the eyeball positioning subsystem is used for positioning eyeballs; and the subjective visual function testing subsystem is used for testing the visual function during subjective refraction.
Preferably, the focusing subsystem comprises a relay telescope, the astigmatism compensation subsystem comprises a cylindrical lens pair, the eyeball positioning subsystem comprises a pupil imaging device, and the subjective visual function testing subsystem comprises a visual target display device and a visual target objective lens; the cylindrical mirror pair is arranged at the conjugate position of the pupil of human eyes, when the system starts to work, the distance between two lenses of the relay telescope along the optical axis is changed according to the human eye refractive error measured by objective optometry to correct the defocusing of human eyes, the cylindrical mirror pair is rotated around the optical axis to correct the astigmatism of human eyes, after the human eye refractive error is corrected, the sighting target display device displays the sighting target of a specific type, and the human eyes observe the sighting target displayed on the sighting target display device through the first relay telescope (3), the cylindrical mirror pair and the sighting target objective lens.
Further preferably, the cylindrical mirror pair may be 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 power.
Further preferably, the optotype display device may be 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 type display device, a printed visual chart.
Further preferably, the first relay telescope is replaced by an inner focusing device, and the inner focusing device comprises a first reflecting mirror, a first lens, a second reflecting mirror, a third reflecting mirror, a second lens and a fourth reflecting mirror.
The invention also provides an optometry method based on the subjective optometry device with the functions of defocusing and astigmatic accurate correction, which comprises the following steps:
s1, changing the distance between two lenses of a first relay telescope along an optical axis to correct the human eye defocusing through a human eye defocusing correction formula according to human eye ametropia data measured by objective optometry; respectively rotating a single cylindrical mirror in the cylindrical mirror pair around the optical axis to correct astigmatism of human eyes through a human eye astigmatism correction formula according to the measured refractive error of the human eyes;
s2, after the human eye refractive error correction is finished, the sighting target display device displays a 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, the cylindrical mirror pair and the sighting target objective lens;
s3, finely adjusting the defocusing size according to subjective visual perception, and finely adjusting the relative angle by rotating the cylindrical mirror to synthesize the astigmatism size and the axial direction until the subjectively optimal corrected visual quality is obtained, so as to finish the monocular subjective refraction optometry;
and S4, after the subjective refraction of the left eye and the right eye is finished, integrally moving the left eye optical path and the right eye optical path along the direction vertical to the optical axis to adjust the interpupillary distance, performing red-green and binocular adjustment balance processes, and finally giving the optimal accurate binocular refraction correction prescription.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the scheme, continuous and accurate correction of human eye defocusing and astigmatism can be achieved by adopting the focusing mechanism and the rotary cylindrical mirror pair, the visual target is displayed by adopting the display device, accurate subjective refraction can be achieved, standard subjective refraction processes such as red-green and binocular adjustment balance are carried out on the basis, and the optimal accurate refraction correction prescription is given finally; can be used for optometry lens matching, population ametropia screening and ophthalmic clinical triage.
Drawings
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
FIG. 2 is a schematic structural view of embodiment 3 of the present invention;
in the figure: 1. the human eye; 2. a pupil imaging device; 3. a relay telescope; 4. through the cylindrical mirror pair; 5. a sighting target objective lens; 6. a visual target display device; 7. a first reflector; 8. a first lens; 9. a second reflector; 10. a third reflector; 11. a second lens; 12. a fourth mirror.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Example 1
Referring to fig. 1, the present invention provides a technical solution:
an optometry device with defocusing and astigmatism accurate correction functions comprises a left eye light path and a right eye light path; the monocular optical path comprises a focusing subsystem, an astigmatism compensation subsystem, an eyeball positioning subsystem and a main viewing function testing subsystem, and all the systems are mutually combined to form a monocular optometry structure;
the focusing subsystem is used for continuously and accurately correcting the defocusing of the human eyes 1; an astigmatism compensation subsystem for continuous accurate correction of astigmatism of the human eye 1; the eyeball positioning subsystem is used for positioning eyeballs; and the subjective visual function testing subsystem is used for testing the visual function during subjective refraction.
The focusing subsystem comprises a relay telescope 3, the astigmatism compensation subsystem comprises a cylindrical lens pair 4, the eyeball positioning subsystem comprises a pupil imaging device 2, and the subjective visual function testing subsystem comprises a visual target display device 6 and a visual target objective lens 5;
the pupil imaging device 2 is arranged at two sides of the relay telescope 3, the cylindrical lens pair 4 is arranged at the rear side of the relay telescope 3, the light path of the relay telescope 3 is collinear with the cylindrical lens pair 4, and the sighting target objective 5 and the sighting target display device 6 are sequentially arranged at the rear side of the cylindrical lens pair 4;
in the embodiment, the cylindrical mirror pair 4 is arranged at the conjugate position of the pupil of a human eye 1, when the system starts to work, the distance between two lenses of the relay telescope 3 along the optical axis is changed according to the refractive error of the human eye 1 measured by objective optometry to correct the defocusing of the human eye 1, the cylindrical mirror pair 4 is rotated around the optical axis to correct the astigmatism of the human eye 1, after the refractive error of the human eye 1 is corrected, the sighting target display device 6 displays a sighting target of a specific type, and the human eye 1 observes the sighting target displayed on the sighting target display device 6 through the relay telescope 3, the cylindrical mirror pair 4 and the sighting target objective 5;
in this embodiment, the cylindrical mirror pair 4 may be selected from a plano-concave/plano-convex cylindrical mirror pair 4, a plano-concave/plano-concave cylindrical mirror pair 4, and a plano-convex/plano-convex cylindrical mirror pair 4, which have the same or different focal powers;
the optotype display device 6 may be 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.
Example 2
Based on the foregoing embodiment 1, the present embodiment provides an optometry method with defocus and astigmatism accurate correction functions, which includes the following steps:
s1, according to human eye 1 ametropia data measured by objective optometry, changing the distance between two lenses of a relay telescope 3 along an optical axis through a human eye 1 defocusing correction formula to correct human eye 1 defocusing; according to the measured refractive error of the human eye 1, respectively rotating the single cylindrical mirror in the cylindrical mirror pair 4(4) around the optical axis to correct the astigmatism of the human eye 1 by an astigmatism correction formula of the human eye 1;
s2, after the human eye 1 refractive error is corrected, the sighting target display device 6 displays a sighting target of a specific type, and the human eye 1 observes and judges the specific sighting target displayed on the sighting target display device 6 through the relay telescope 3, the cylindrical mirror pair 4 and the sighting target objective 5;
s3, finely adjusting the defocusing size according to subjective visual perception, and finely adjusting the relative angle of the rotating cylindrical mirror pair 4 to synthesize the astigmatism size and the axial direction until the best corrected visual quality is obtained, so as to finish the subjective refraction of the monocular;
and S4, after the subjective refraction of the left eye and the right eye is finished, integrally moving the left eye optical path and the right eye optical path along the direction vertical to the optical axis to adjust the interpupillary distance, performing red-green and binocular adjustment balance processes, and finally giving the optimal accurate binocular refraction correction prescription.
The defocusing correction is completed by integrally moving the inner focusing of the defocusing adjusting structure left and right.
The defocusing adjusting structure comprises a cylindrical lens pair 4, a sighting target display device 6, a sighting target objective 5 and a lens close to the cylindrical lens pair 4 side in the relay telescope 3;
in the present embodiment, the formula for correcting defocus of the human eye 1 is as follows:
D＝[d-(f1+f2)]Φ (1)
wherein D is correctable defocus, f1、f2The focal lengths of the two lenses in the relay telescope 3, d is the distance between the two lenses in the relay telescope 3 in the direction of the optical axis, and phi is determined by the focal lengths of the two lenses in the relay telescope 3. As can be seen from equation 1, by changing the distance between the two lenses in the relay telescope 3 on the optical axis, continuous correction of defocus of the human eye 1 can be achieved.
The formula for correcting astigmatism in the human eye 1 is as follows:
C＝2Fccos(a1-a2)
Figure BDA0003065472780000071
wherein C and phi are respectively the magnitude and axial direction of correctable astigmatism, FcIs the astigmatism of the individual cylindrical mirrors in the cylindrical mirror pair 4, a1And a2Is the astigmatic axis of the two cylindrical mirrors. As can be seen from the formula (2), continuous correction of astigmatism of the human eye 1 can be achieved by rotating the single cylindrical mirrors in the cylindrical mirror pair 4, respectively.
Example 3
Referring to fig. 2, the embodiment provides an optometry apparatus with defocus and astigmatism accurate correction functions, which is similar to that in embodiment 1, and is different in that an inner focusing device is replaced by an inner focusing device;
namely, the device consists of a left eye light path and a right eye light path; the monocular optical path comprises a focusing subsystem, an astigmatism compensation subsystem, an eyeball positioning subsystem and a main viewing function testing subsystem, and all the systems are mutually combined to form a monocular optometry structure;
the focusing subsystem is used for continuously and accurately correcting the defocusing of the human eyes 1; an astigmatism compensation subsystem for continuous accurate correction of astigmatism of the human eye 1; the eyeball positioning subsystem is used for positioning eyeballs; and the subjective visual function testing subsystem is used for testing the visual function during subjective refraction.
The focusing subsystem comprises an internal focusing device, the astigmatism compensation subsystem comprises a cylindrical lens pair 4, the eyeball positioning subsystem comprises a pupil imaging device 2, and the subjective visual function test subsystem comprises a visual target display device 6 and a visual target objective lens 5;
the pupil imaging device 2 is arranged at two sides of the inner focusing device, the cylindrical lens pair 4 is arranged at the rear side of the inner focusing device, the light path of the inner focusing device is collinear with the cylindrical lens pair 4, and the sighting target objective 5 and the sighting target display device 6 are sequentially arranged at the rear side of the cylindrical lens pair 4;
the inner focusing device comprises a first reflector 7, a first lens 8, a second reflector 9, a third reflector 1010, a second lens 11 and a fourth reflector 12; the fourth reflector 12 is arranged at an angle of 45 degrees with the incident light of the human eye 1, the hot incident light of the human eye 1 is reflected into the second lens 11 after passing through the fourth reflector 12,
third speculum 10 and second lens 11 become certain angle setting, and second mirror 9 and third speculum 10 symmetry set up, and the light through second lens 11 has and enters into first lens 8 by second mirror 9 and third speculum 10 reflection back, first speculum 7 and first lens 8 become 45 degrees angle settings, and light is to the cylindrical mirror 4 outgoing through first speculum 7.
In the embodiment, the cylindrical mirror pair 4 is arranged at the conjugate position of the pupil of a human eye 1, when the system starts to work, the distance of the second defocusing adjusting structure is changed according to the refractive error of the human eye 1 measured by objective optometry to correct the defocusing of the human eye 1, the cylindrical mirror pair 4 is rotated around an optical axis to correct the astigmatism of the human eye 1, after the refractive error of the human eye 1 is corrected, a sighting target display device 6 displays a sighting target of a specific type, and the human eye 1 observes the sighting target displayed on the sighting target display device 6 through the relay telescope 3, the cylindrical mirror pair 4 and the sighting target objective 5;
the second defocusing adjusting structure comprises a second reflecting mirror 9 and a third reflecting mirror 10, and the defocusing of the human eye 1 is adjusted by moving the distance between the second defocusing adjusting structure and the first lens 8 and the second lens 11.
In this embodiment, the cylindrical mirror pair 4 may be selected from a plano-concave/plano-convex cylindrical mirror pair 4, a plano-concave/plano-concave cylindrical mirror pair 4, and a plano-convex/plano-convex cylindrical mirror pair 4, which have the same or different focal powers;
the optotype display device 6 may be 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.
Example 4
Based on the above embodiment 3, the present embodiment provides an optometry method with defocus and astigmatism accurate correction functions, which includes the following steps:
s1, according to human eye 1 ametropia data measured by objective optometry, correcting human eye 1 defocusing by changing the distance between a second defocusing adjusting structure in an inner focusing device and a first lens 8 and a second lens 11 through a human eye 1 defocusing correction formula; according to the measured refractive error of the human eye 1, respectively rotating the single cylindrical mirror in the cylindrical mirror pair 4(4) around the optical axis to correct the astigmatism of the human eye 1 by an astigmatism correction formula of the human eye 1;
s2, after the human eye 1 refractive error is corrected, the sighting target display device 6 displays a sighting target of a specific type, and the human eye 1 observes and judges the specific sighting target displayed on the sighting target display device 6 through the internal focusing device, the cylindrical lens pair 4 and the sighting target objective lens 5;
s3, finely adjusting the defocusing size according to subjective visual perception, and finely adjusting the relative angle of the rotating cylindrical mirror pair 4 to synthesize the astigmatism size and the axial direction until the best corrected visual quality is obtained, so as to finish the subjective refraction of the monocular;
and S4, after the subjective refraction of the left eye and the right eye is finished, integrally moving the left eye optical path and the right eye optical path along the direction vertical to the optical axis to adjust the interpupillary distance, performing red-green and binocular adjustment balance processes, and finally giving the optimal accurate binocular refraction correction prescription.
The defocus correction is performed by moving the distance between the second defocus adjustment structure and the first lens 8 and the second lens 11 left and right as a whole.
In the present embodiment, the formula for correcting defocus of the human eye 1 is as follows:
D＝[d-(f1+f2)]Φ (1)
wherein D is correctable defocus, f1、f2D are focal lengths of the first lens 8 and the second lens 11 and a distance therebetween, respectively, and the defocus of the human eye 1 is corrected by changing the distances of the first lens 88 and the second lens 1111 in the optical axis direction by moving the second mirror 99 and the third mirror 1010 integrally. As can be seen from equation 1, by changing the distance between the second defocus adjustment structure in the inner focusing apparatus and the first lens 8 and the second lens 11, continuous correction of defocus of the human eye 1 can be achieved.
The formula for correcting astigmatism in the human eye 1 is as follows:
C＝2Fccos(a1-a2)
Figure BDA0003065472780000101
wherein C and phi are respectively the magnitude and axial direction of correctable astigmatism, FcIs the astigmatism of the individual cylindrical mirrors in the cylindrical mirror pair 4, a1And a2Is the astigmatic axis of the two cylindrical mirrors. As can be seen from the formula (2), continuous correction of astigmatism of the human eye 1 can be achieved by rotating the single cylindrical mirrors in the cylindrical mirror pair 4, respectively.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The utility model provides a possess out of focus and astigmatic accurate correction function's optometry device which characterized in that: the device consists of a left eye light path and a right eye light path; the monocular optical path comprises a focusing subsystem, an astigmatism compensation subsystem, an eyeball positioning subsystem and a main viewing function testing subsystem, and all the systems are mutually combined to form a monocular optometry structure.
2. The optometric instrument with defocus and astigmatism accurate correction functions as claimed in claim 1, wherein: the focusing subsystem comprises a relay telescope, the astigmatism compensation subsystem comprises a cylindrical lens pair, the eyeball positioning subsystem comprises a pupil imaging device, and the subjective visual function testing subsystem comprises a visual target display device and a visual target objective lens;
the cylindrical mirror pair is arranged at the conjugate position of the pupil of the human eye, when the system starts to work, the distance between the two lenses of the relay telescope along the optical axis is changed according to the human eye refractive error measured by objective optometry to correct the defocusing of the human eye, the cylindrical mirror pair is rotated around the optical axis to correct the astigmatism of the human eye, after the human eye refractive error is corrected, the sighting mark display device displays the sighting mark of a specific type, and the human eye observes the sighting mark displayed on the sighting mark display device through the relay telescope, the cylindrical mirror pair and the sighting mark objective lens.
3. The optometric instrument with defocus and astigmatism accurate correction functions as claimed in claim 2, wherein: the cylindrical mirror pair is one of 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.
4. The optometric instrument with defocus and astigmatism accurate correction functions as claimed in claim 2, wherein: the visual target display device is one of a CRT display, a commercial projector, a liquid crystal display, a plasma display, an electroluminescent display, an organic light emitting display, a projection display device and a printing visual chart.
5. The optometric instrument with defocus and astigmatism accurate correction functions as claimed in claim 1, wherein: the focusing subsystem comprises an internal focusing device, the astigmatism compensation subsystem comprises a cylindrical lens pair, the eyeball positioning subsystem comprises a pupil imaging device, and the subjective visual function testing subsystem comprises a visual target display device and a visual target objective lens.
6. The optometric instrument with defocus and astigmatism fine correction functions as claimed in claim 5, wherein: the pupil imaging device is arranged at two sides of the inner focusing device, the cylindrical lens pair is arranged at the rear side of the inner focusing device, the light path of the inner focusing device is collinear with the cylindrical lens pair, and the sighting mark objective lens and the sighting mark display device are sequentially arranged at the rear side of the cylindrical lens pair; the inner focusing device comprises a first reflecting mirror, a first lens, a second reflecting mirror, a third reflecting mirror, a second lens and a fourth reflecting mirror.
7. An optometric method based on the optometric instrument of claim 1 or 2 or 3 or 4, characterized in that: which comprises the following steps:
s1, changing the distance between two lenses of a relay telescope along an optical axis to correct the human eye defocusing through a human eye defocusing correction formula according to human eye ametropia data measured by objective optometry; respectively rotating a single cylindrical mirror in the cylindrical mirror pair around the optical axis to correct astigmatism of human eyes through a human eye astigmatism correction formula according to the measured refractive error of the human eyes;
s2, after the human eye refractive error correction is finished, the sighting target display device displays a 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 relay telescope, the cylindrical mirror pair and the sighting target objective lens;
s3, finely adjusting the defocusing size according to subjective visual perception, and finely adjusting the relative angle by rotating the cylindrical mirror to synthesize the astigmatism size and the axial direction until the subjectively optimal corrected visual quality is obtained, so as to finish the monocular subjective refraction optometry;
and S4, after the subjective refraction of the left eye and the right eye is finished, integrally moving the left eye optical path and the right eye optical path along the direction vertical to the optical axis to adjust the interpupillary distance, performing red-green and binocular adjustment balance processes, and finally giving the optimal accurate binocular refraction correction prescription.
8. An optometric method based on the optometric instrument of claim 5 or 6, comprising: which comprises the following steps:
s1, according to human eye ametropia data measured by objective optometry, changing the distance between a second out-of-focus adjusting structure in an inner focusing device and a first lens and a second lens through a human eye out-of-focus correcting formula to correct human eye out-of-focus; respectively rotating a single cylindrical mirror in the cylindrical mirror pair around the optical axis to correct astigmatism of human eyes through a human eye astigmatism correction formula according to the measured refractive error of the human eyes;
s2, after the human eye refractive error correction is finished, the visual target display device displays a visual target of a specific type, and the human eye observes and judges the specific visual target displayed on the visual target display device through the internal focusing device, the cylindrical lens pair and the visual target objective lens;
s3, finely adjusting the defocusing size according to subjective visual perception, and finely adjusting the relative angle by rotating the cylindrical mirror to synthesize the astigmatism size and the axial direction until the subjectively optimal corrected visual quality is obtained, so as to finish the monocular subjective refraction optometry;
and S4, after the subjective refraction of the left eye and the right eye is finished, integrally moving the left eye optical path and the right eye optical path along the direction vertical to the optical axis to adjust the interpupillary distance, performing red-green and binocular adjustment balance processes, and finally giving the optimal accurate binocular refraction correction prescription.
The defocus correction is performed by moving the distance between the second defocus adjustment structure and the first lens and the second lens left and right as a whole.
The second defocusing adjusting structure comprises a second reflecting mirror and a third reflecting mirror, and the distance between the second defocusing adjusting structure and the first lens and the second lens is moved to adjust the out-of-focus of the human eye.
CN202110525066.2A 2021-05-14 2021-05-14 Optometry device with defocusing and astigmatism accurate correction functions and optometry method Pending CN113208554A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
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CN113576397A (en) * 2021-08-27 2021-11-02 无锡吾渡光学科技有限公司 Optometry method with higher myopia degree detection precision

Citations (1)

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Publication number Priority date Publication date Assignee Title
CN110367925A (en) * 2019-08-22 2019-10-25 长兴爱之瞳医疗科技有限公司 The diagnostic optometry equipment of subjective and objective integral type and optometry method

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
CN110367925A (en) * 2019-08-22 2019-10-25 长兴爱之瞳医疗科技有限公司 The diagnostic optometry equipment of subjective and objective integral type and optometry method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113576397A (en) * 2021-08-27 2021-11-02 无锡吾渡光学科技有限公司 Optometry method with higher myopia degree detection precision

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