CN116616695A - Human eye optical characteristic acquisition method, large-view-field optometry device and optometry system - Google Patents
Human eye optical characteristic acquisition method, large-view-field optometry device and optometry system Download PDFInfo
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- 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
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Abstract
The disclosure provides a method for acquiring optical characteristics of human eyes based on dynamic light paths, which comprises the following steps: constructing initial detection light; dynamically adjusting the light path of the initial detection light to form a first dynamic light path dynamically adjusted in a first direction so as to irradiate the target human eye based on the first dynamic light path and measure the reflected light of the target human eye to obtain first reflected light information; dynamically adjusting the light path of the initial detection light to form a second dynamic light path which is dynamically adjusted in a second direction so as to irradiate the target human eye based on the second dynamic light path and measure the reflected light of the target human eye, thereby obtaining second reflected light information; and obtaining an optical characteristic of the target human eye based on the first reflected light information and the second reflected light information; the first direction is different from the second direction such that an illuminated area of the first dynamic light path on the retina of the target human eye and an illuminated area of the second dynamic light path on the retina of the target human eye have non-overlapping areas. The present disclosure also provides a large field of view optometry apparatus and optometry system.
Description
Technical Field
The disclosure relates to the technical field of diopter measurement and visual assessment, in particular to a human eye optical characteristic acquisition method based on a dynamic light path, a large-view-field optometry device and an optometry system.
Background
Myopia is the most common type of ametropia, and the incidence rate is high worldwide, and nearly one third of the population in China suffers from myopia. Meanwhile, high myopia is a high risk factor causing serious vision deterioration such as glaucoma, cataract, retinal detachment, etc., and world health organization puts near vision prevention and treatment into the global anti-blindness program.
Although there are various hypotheses about the pathogenesis of myopia, there is currently no theory that can fully elucidate the pathogenesis of myopia. With the continuous and intensive research, people realize that vision is related to not only the fovea (namely the macula fovea), but also the paracentric region seriously influences the occurrence and development of myopia, and research is conducted to consider that hyperopic defocus can induce the increase of the ocular axis and further cause the deepening of diopter, so that the method has important significance in the field of vision research, in particular to research and practice of the occurrence and development of myopia for the measurement of peripheral retinal refractive state and the research of peripheral retinal refractive correction.
There are subjective and objective approaches to the study of peripheral retinal vision.
Subjective methods, such as chinese patent CN110113985a, but they lack gold standards similar to foveal vision refraction, the results are greatly affected by the tester itself.
Objective methods, typically such as chinese patent document CN103142210a, which measure fovea peripheral diopter based on OCT techniques, indirectly obtain visual axis and peripheral diopter by acquiring eye morphology using computer simulation and image processing. For example, in chinese patent document CN111110184a, a large-field objective aberration measurement system is constructed by modifying an aberration measurement device with a zero-degree field of view, and the measured peripheral retinal diopter number can be reported, but the peripheral aberration measurement process is based on the rotation of the eyeball of the subject, and relies on the rotation fit of the eyeball of the subject, so that it is difficult to accurately control the off-center angle, and eye fatigue of the subject is easily caused, and the measurement result is not reliable.
In order to meet the requirements of large visual field diopter measurement and visual assessment of human eyes, it is necessary to provide a large visual field human eye optometry instrument with accurate and reliable measurement results, and the angle of the measurement visual field is controlled in an objective mode, and meanwhile, the diopter of the macula fovea and the peripheral retina can be measured, and the visual functions of the macula fovea and the peripheral retina can be measured.
Disclosure of Invention
The disclosure provides a human eye optical characteristic acquisition method, a large-view-field optometry device and an optometry system based on a dynamic light path.
According to one aspect of the present disclosure, there is provided a method for acquiring optical characteristics of a human eye based on a dynamic optical path, including:
constructing initial detection light;
dynamically adjusting the light path of the initial detection light to form a first dynamic light path which is dynamically adjusted in a first direction so as to irradiate a target human eye based on the first dynamic light path and measure the reflected light of the target human eye to obtain first reflected light information;
dynamically adjusting the light path of the initial detection light to form a second dynamic light path which is dynamically adjusted in a second direction so as to irradiate the target human eye based on the second dynamic light path and measure the reflected light of the target human eye to obtain second reflected light information;
acquiring optical characteristics of the target human eye based on the first reflected light information and the second reflected light information;
wherein the first direction is different from the second direction such that an illuminated area of the first dynamic light path on the retina of the target human eye and an illuminated area of the second dynamic light path on the retina of the target human eye have non-overlapping areas.
According to the method for acquiring the optical characteristics of the human eye based on the dynamic light path in at least one embodiment of the present disclosure, the initial detection light is a parallel light beam.
According to the human eye optical characteristic acquisition method based on the dynamic light path of at least one embodiment of the present disclosure, the first dynamic light path is configured to be capable of being irradiated to the macular fovea and the two side areas of the macular fovea of the target human eye in the first direction, and the second dynamic light path is configured to be capable of being irradiated to the macular fovea and the two side areas of the macular fovea of the target human eye in the second direction.
According to the dynamic light path-based human eye optical characteristic acquisition method of at least one embodiment of the present disclosure, the first dynamic light path is configured to irradiate the two side regions of the macula fovea in the first direction two or more times, and the second dynamic light path is configured to irradiate the two side regions of the macula fovea in the second direction two or more times.
According to the dynamic light path-based human eye optical characteristic acquisition method of at least one embodiment of the present disclosure, the first dynamic light path is configured to perform a first irradiation on both side regions of the macular fovea in the first direction and then perform a second irradiation, and the second dynamic light path is configured to perform a first irradiation on both side regions of the macular fovea in the second direction and then perform a second irradiation.
According to the method for acquiring the optical characteristics of the human eye based on the dynamic light path, the first direction is a horizontal direction, and the second direction is a vertical direction.
According to at least one embodiment of the present disclosure, in a process of irradiating a target human eye by the first dynamic light path, reflected light of the target human eye is collected in a uniform or non-uniform manner to obtain the first reflected light information; the non-uniform mode is configured to collect reflected light in a mode that sampling points are gradually dense or gradually sparse in the process that the first dynamic light path irradiates towards two side areas of the macula lutea fovea.
According to at least one embodiment of the present disclosure, in the process of irradiating a target human eye by the second dynamic light path, the reflected light of the target human eye is collected in a uniform or non-uniform manner to obtain the second reflected light information; the non-uniform mode is configured to collect reflected light in a mode that sampling points are gradually dense or gradually sparse in the process that the second dynamic light path is irradiated to two side areas of the macula lutea fovea.
According to the human eye optical characteristic acquisition method based on the dynamic optical path of at least one embodiment of the present disclosure, the irradiation and reflected light measurement based on the first dynamic optical path are performed on both eyes simultaneously, and the irradiation and reflected light measurement based on the second dynamic optical path are performed on both eyes simultaneously.
According to the human eye optical characteristic acquisition method based on the dynamic light path of at least one embodiment of the present disclosure, in the process of synchronously performing illumination and reflected light measurement based on the first dynamic light path on both eyes, the scanning direction of the first dynamic light path of the left eye is opposite to the scanning direction of the first dynamic light path of the right eye;
in the process of synchronously performing the irradiation and the reflected light measurement based on the second dynamic light path for both eyes, the scanning direction of the second dynamic light path for the left eye is also opposite to the scanning direction of the second dynamic light path for the right eye.
According to another aspect of the present disclosure, the present disclosure provides a large field of view optometry device that can be used to perform the method of human eye optical feature acquisition of any one of the embodiments of the present disclosure, comprising: a light source section for emitting initial light;
a first convex lens that converts the initial light into a parallel light beam as the initial detection light;
A deflection device configured to be reciprocally deflectable in a first direction to reflect the initial detection light to form a first dynamic light path dynamically adjusted in the first direction, the deflection device configured to be reciprocally deflectable in a second direction to reflect the initial detection light to form a second dynamic light path dynamically adjusted in the second direction;
the optical detector is used for detecting the reflected light of the target human eye so as to obtain the first reflected light information and the second reflected light information.
According to the wide-field optometry device of at least one embodiment of the present disclosure, the light source section includes a point light source or an extended light source.
A large field of view optometry device according to at least one embodiment of the present disclosure further comprises:
the transition optical component is configured between the deflection device and the target human eye, so that the deflection center of the deflection device and the pupil of the target human eye are positioned at conjugate positions, and the first dynamic light path and the second dynamic light path can be converged on the retina of the target human eye after passing through the transition optical component.
A wide-field optometry apparatus according to at least one embodiment of the present disclosure, the transition optics assembly comprises a transmissive/reflective 4f system in combination with a cylindrical lens group, a liquid lens, a anamorphic mirror, or a liquid crystal spatial light modulator.
A large field of view optometry device according to at least one embodiment of the present disclosure further comprises:
and the aperture matching component is configured between the deflection device and the optical detector and is used for adjusting the beam aperture of the reflected light from the target human eye reflected by the deflection device so as to adapt to the optical detection aperture of the optical detector.
According to at least one embodiment of the present disclosure, the aperture matching assembly is implemented by a lens group.
A large field of view optometry device according to at least one embodiment of the present disclosure further comprises:
the first light splitting device is configured between the first convex lens and the deflection device, so that the initial detection light can pass through the first light splitting device and be transmitted to the deflection device, and the reflected light from the target human eye reflected by the deflection device can be reflected by the first light splitting device to be transmitted to the aperture matching assembly and further transmitted to the light detector.
A large field of view optometry device according to at least one embodiment of the present disclosure further comprises:
And the optotype component is used for providing an optotype capable of being projected to different areas of the retina of the target human eye through the first dynamic light path and the second dynamic light path.
A large field of view optometry device according to at least one embodiment of the present disclosure further comprises:
the sighting target light provided by the sighting target assembly is collimated by the second convex lens, reflected to the first light-splitting device by the second light-splitting device and then reflected to the deflection device by the first light-splitting device.
According to the large-view-field optometry device of at least one embodiment of the present disclosure, the reflected light from the target human eye reflected by the deflection device can be reflected by the first light-splitting device to the second light-splitting device and transmitted by the second light-splitting device to the aperture matching assembly and further to the photodetector.
A large field of view optometry apparatus according to at least one embodiment of the present disclosure, the light detector is in a conjugate position with the deflection device.
A large field of view optometry device according to at least one embodiment of the present disclosure is capable of performing diopter measurements and/or vision function measurements of a zero degree field of view when the deflection means is not deflected.
According to yet another aspect of the present disclosure, there is provided an optometry system comprising:
two large field optometry devices of any of the embodiments of the present disclosure are used to perform human eye optical feature acquisition for the left and right eyes, respectively.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.
Fig. 1 is a flow diagram of a method for acquiring optical characteristics of a human eye based on a dynamic light path according to an embodiment of the present disclosure.
Fig. 2A is a schematic structural view of a wide field refraction device of one embodiment of the present disclosure.
Fig. 2B is a schematic structural view of a large field-of-view optometry device of yet another embodiment of the present disclosure.
Fig. 3 is a schematic view of a field of view of a retina that can be illuminated by a large field of view optometry device of one embodiment of the disclosure.
Fig. 4 is a graph of diopter information obtained by a large field of view optometry device of one embodiment of the present disclosure.
Fig. 5A is a schematic structural view of a large field-of-view optometry device of yet another embodiment of the present disclosure.
Fig. 5B is a schematic structural view of a large field-of-view optometry device of yet another embodiment of the present disclosure.
Fig. 6A is a binocular structured large field refraction system of one embodiment of the present disclosure.
Fig. 6B is a binocular structured large field refraction system of another embodiment of the present disclosure.
Description of the reference numerals
100. Large-view-field optometry device
101. Light source unit
102. First convex lens
103. Deflection device
104. Photodetector
105. Transitional optical component
106. Caliber matching assembly
107. First spectroscopic device
108. Optotype assembly
109. Second convex lens
110. Second light-splitting device
111. Aperture dividing device
112. Imaging objective lens
200. The target human eye.
Detailed Description
The present disclosure is described in further detail below with reference to the drawings and the embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant content and not limiting of the present disclosure. It should be further noted that, for convenience of description, only a portion relevant to the present disclosure is shown in the drawings.
In addition, embodiments of the present disclosure and features of the embodiments may be combined with each other without conflict. The technical aspects of the present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Unless otherwise indicated, the exemplary implementations/embodiments shown are to be understood as providing exemplary features of various details of some ways in which the technical concepts of the present disclosure may be practiced. Thus, unless otherwise indicated, features of the various implementations/embodiments may be additionally combined, separated, interchanged, and/or rearranged without departing from the technical concepts of the present disclosure.
The use of cross-hatching and/or shading in the drawings is typically used to clarify the boundaries between adjacent components. As such, the presence or absence of cross-hatching or shading does not convey or represent any preference or requirement for a particular material, material property, dimension, proportion, commonality between illustrated components, and/or any other characteristic, attribute, property, etc. of a component, unless indicated. In addition, in the drawings, the size and relative sizes of elements may be exaggerated for clarity and/or descriptive purposes. While the exemplary embodiments may be variously implemented, the specific process sequences may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in reverse order from that described. Moreover, like reference numerals designate like parts.
When an element is referred to as being "on" or "over", "connected to" or "coupled to" another element, it can be directly on, connected or coupled to the other element or intervening elements may be present. However, when an element is referred to as being "directly on," "directly connected to," or "directly coupled to" another element, there are no intervening elements present. For this reason, the term "connected" may refer to physical connections, electrical connections, and the like, with or without intermediate components.
For descriptive purposes, the present disclosure may use spatially relative terms such as "under … …," under … …, "" under … …, "" lower, "" above … …, "" upper, "" above … …, "" higher "and" side (e.g., in "sidewall") to describe one component's relationship to another (other) component as illustrated in the figures. In addition to the orientations depicted in the drawings, the spatially relative terms are intended to encompass different orientations of the device in use, operation, and/or manufacture. For example, if the device in the figures is turned over, elements described as "under" or "beneath" other elements or features would then be oriented "over" the other elements or features. Thus, the exemplary term "below" … … can encompass both an orientation of "above" and "below". Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, when the terms "comprises" and/or "comprising," and variations thereof, are used in the present specification, the presence of stated features, integers, steps, operations, elements, components, and/or groups thereof is described, but the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof is not precluded. It is also noted that, as used herein, the terms "substantially," "about," and other similar terms are used as approximation terms and not as degree terms, and as such, are used to explain the inherent deviations of measured, calculated, and/or provided values that would be recognized by one of ordinary skill in the art.
Fig. 1 is a flow diagram of a method for acquiring optical characteristics of a human eye based on a dynamic light path according to an embodiment of the present disclosure.
Referring first to fig. 1, a method S100 for acquiring optical characteristics of a human eye based on a dynamic optical path of the present disclosure includes:
S102, constructing initial detection light;
s104, dynamically adjusting the light path of the initial detection light to form a first dynamic light path dynamically adjusted in a first direction so as to irradiate the target human eye based on the first dynamic light path and measure the reflected light of the target human eye to obtain first reflected light information;
s106, dynamically adjusting the light path of the initial detection light to form a second dynamic light path dynamically adjusted in a second direction so as to irradiate the target human eye based on the second dynamic light path and measure the reflected light of the target human eye, and obtaining second reflected light information;
s108, acquiring optical characteristics of the target human eye based on the first reflected light information and the second reflected light information.
Wherein the first direction is different from the second direction such that an illuminated area of the first dynamic light path on the retina of the target human eye and an illuminated area of the second dynamic light path on the retina of the target human eye have non-overlapping areas.
The method for acquiring the human eye optical characteristics based on the dynamic light path comprises the steps of constructing a first dynamic light path dynamically adjusted in a first direction and a second dynamic light path dynamically adjusted in a second direction, and aims to irradiate different visual fields of retina of a target human eye under the condition that the target human eye does not rotate, so that reflected light information of retina of the target human eye based on a large visual field is acquired, and further the large visual field diopter of the target human eye is acquired.
According to the human eye optical characteristic acquisition method based on the dynamic light path, the size (angle range) of the measurement view field is controlled in an objective mode, the method can be used for measuring diopter of the macula fovea, diopter of peripheral retina of the macula fovea and vision function of the peripheral retina of the macula fovea, the limitation that an existing optometry instrument only measures the diopter of the central view field can be effectively solved, and accurate measurement and vision function assessment of large-view-field diopter of human eyes are achieved.
In the human eye optical characteristic acquisition method S100 of the present disclosure, the above-described initial detection light is a parallel light beam.
In some embodiments of the present disclosure, the first direction described above is a horizontal direction and the second direction is a vertical direction. Those skilled in the art may adjust the first direction and the second direction described in the present disclosure in the light of the technical solution of the present disclosure, which all fall within the protection scope of the present disclosure.
In the dynamic light path-based human eye optical characteristic acquisition method S100 of the present disclosure, the first dynamic light path described above is configured to be capable of being irradiated to the macular fovea and both side regions of the macular fovea of the target human eye in the first direction, and the second dynamic light path is configured to be capable of being irradiated to the macular fovea and both side regions of the macular fovea of the target human eye in the second direction. Based on the above configuration of the first dynamic light path and the second dynamic light path, the human eye optical characteristic acquisition method of the present disclosure can construct an irradiation region of a large field of view on the retina of the target human eye.
In the human eye optical characteristic obtaining method S100 of some embodiments of the present disclosure, the first dynamic optical path is configured to irradiate the two side regions of the fovea in the first direction more than twice, the second dynamic optical path is configured to irradiate the two side regions of the fovea in the second direction more than twice, the number of times the first dynamic optical path irradiates the two side regions of the fovea in the first direction is the same, for example, the first side and the second side are both irradiated twice, and the number of times the second dynamic optical path irradiates the two side regions of the fovea in the second direction is the same, for example, the first side and the second side are both irradiated twice. The irradiation pattern of the present embodiment is configured so that more accurate light reflection information from the retina is obtained and the first dynamic light path and the second dynamic light path are formed in a more easily controllable manner, for example, by reciprocating a deflection device described below about two axes perpendicular to each other.
In some embodiments of the present disclosure, preferably, the first dynamic light path in the dynamic light path-based human eye optical characteristic acquisition method S100 of the present disclosure is configured to perform the first irradiation on both side regions of the fovea in the first direction and then perform the second irradiation, and the second dynamic light path is configured to perform the first irradiation on both side regions of the fovea in the second direction and then perform the second irradiation.
In some embodiments of the present disclosure, in order to obtain light reflection information of a more comprehensive region of interest, in the method S100 for obtaining an optical characteristic of a human eye based on a dynamic light path of the present disclosure, in a process of irradiating a target human eye by a first dynamic light path, reflected light of the target human eye is collected in a non-uniform manner to obtain first reflected light information; and collecting reflected light of the target human eye in a non-uniform mode in the process of irradiating the target human eye by the second dynamic light path so as to obtain second reflected light information.
For example, to obtain more comprehensive reflected light information of the retinal border region, the non-uniform manner described above is configured to: and in the process of irradiating the first dynamic light path from the macular fovea to the two side areas, the reflected light is collected in a mode that sampling points are gradually dense, and in the process of irradiating the second dynamic light path from the macular fovea to the two side areas, the reflected light is collected in a mode that sampling points are gradually dense.
In some embodiments of the present disclosure, in the dynamic light path-based human eye optical characteristic acquisition method S100 of the present disclosure, the illumination and reflected light measurement based on the first dynamic light path are performed on both eyes in synchronization, and the illumination and reflected light measurement based on the second dynamic light path are performed on both eyes in synchronization.
In the process of synchronously executing the irradiation and reflected light measurement based on the first dynamic light path for the two eyes, the scanning direction of the first dynamic light path of the left eye is opposite to the scanning direction of the first dynamic light path of the right eye; in the process of synchronously performing the irradiation and the reflected light measurement based on the second dynamic light path for both eyes, the scanning direction of the second dynamic light path for the left eye is also opposite to the scanning direction of the second dynamic light path for the right eye. By the arrangement in the scanning direction, rotation of both eyes under irradiation of the dynamic optical path can be avoided as much as possible.
The present disclosure also provides a large field of view optometry device capable of implementing the dynamic light path-based human eye optical feature acquisition method of any of the above-described embodiments.
Fig. 2A is a schematic structural view of a wide field refraction device of one embodiment of the present disclosure. Fig. 2B is a schematic structural view of a wide-field optometry device of another embodiment of the present disclosure.
Referring to fig. 2A and 2B, in some embodiments of the present disclosure, a large field-of-view optometry apparatus 100 of the present disclosure comprises:
a light source section 101, the light source section 101 for emitting initial light;
a first convex lens 102, the first convex lens 102 converting the initial light into a parallel light beam as initial detection light;
A deflection device 103, the deflection device 103 being configured to be capable of being reciprocally deflected in a first direction to reflect the initial detection light to form a first dynamic light path dynamically adjusted in the first direction, the deflection device 103 being configured to be capable of being reciprocally deflected in a second direction to reflect the initial detection light to form a second dynamic light path dynamically adjusted in the second direction;
the light detector 104, the light detector 104 is configured to detect the reflected light of the target human eye 200 to obtain the first reflected light information and the second reflected light information.
The light source unit 101 may be a point light source, an extended light source, or the like. The deflection devices of the present disclosure may be mechanical galvanometers, electric two-dimensional adjustment mirrors, piezoelectric two-dimensional adjustment mirrors, two-dimensional MEMS tilting mirrors, and the like, all falling within the scope of the present disclosure.
Fig. 2A and 2B illustrate that the deflection device 103 is horizontal in the first direction, and the deflection device 103 forms the first dynamic optical path described above by swinging reciprocally in the horizontal direction, thereby achieving illumination of the fovea of the retina of the target human eye 200 and the regions on both sides of the fovea in the horizontal direction.
Referring to fig. 2A and 2B, a wide field of view optometry apparatus 100 of the present disclosure preferably comprises: the transition optical component 105, the transition optical component 105 is configured between the deflection device 103 and the target human eye 200, so that the deflection center of the deflection device 103 and the pupil of the target human eye 200 are at conjugate positions, and the first dynamic light path and the second dynamic light path can be converged on the retina of the target human eye 200 after passing through the transition optical component 105.
The transition optics 105 described in this disclosure may be a transmissive/reflective 4f system in combination with a cylindrical lens group, a liquid lens, a anamorphic mirror, or a liquid crystal spatial light modulator, all falling within the scope of the present disclosure.
With continued reference to fig. 2A and 2B, in some embodiments of the present disclosure, the large field-of-view optometry apparatus 100 of the present disclosure further comprises: aperture matching component 106, aperture matching component 106 is disposed between deflection device 103 and photodetector 104, aperture matching component 106 is used to adjust the beam aperture of the reflected light from target human eye 200 reflected via deflection device 103 to adapt to the light detection aperture of photodetector 104.
The aperture matching assembly 106 of the present disclosure is preferably implemented by a lens group. Those skilled in the art, with the benefit of this disclosure, may adjust or select the lens combination of the aperture matching assembly 106 while remaining within the scope of this disclosure.
Referring to fig. 2A and 2B, in some embodiments of the present disclosure, the large field-of-view optometry apparatus 100 of the present disclosure further comprises: the first spectroscopic device 107, the first spectroscopic device 107 is disposed between the first convex lens 102 and the deflection device 103 such that the initial detection light can pass through the first spectroscopic device 107 and be transmitted to the deflection device 103, and the reflected light from the target human eye 200 reflected via the deflection device 103 can be reflected by the first spectroscopic device 107 to be transmitted to the aperture matching unit 106 and thus to the photodetector 104.
Referring to fig. 2A and 2B, in some embodiments of the present disclosure, an aperture division device 111 is preferably further configured between the aperture matching component 106 and the optical detector 104, and by configuring the aperture division device 111, wavefront aberration information in reflected light information of the target human eye 200 is divided into sub-units by the aperture division device 111, and then is acquired by the optical detector 104 (for example, a CCD camera), and the wavefront aberration information of the target human eye is obtained by using a wavefront restoration algorithm, so as to complete measurement of diopter of the human eye.
In some embodiments of the present disclosure, with continued reference to fig. 2A, the large field of view optometry apparatus 100 of the present disclosure further comprises: the optotype component 108, the optotype light provided by the optotype component 108 can be projected to different areas of the retina of the target human eye through the first dynamic light path and the second dynamic light path.
In other embodiments of the present disclosure, referring to fig. 2B, the optotype light provided by the optotype assembly 108 is projected onto the retina of the target human eye 200 in a static light path.
In some embodiments of the present disclosure, referring to fig. 2A, there is shown a second convex lens 109 and a second light splitting device 110 of the wide-field optometry apparatus 100, and the optotype light provided by the optotype assembly 108 is reflected by the second convex lens 109, then reflected by the second light splitting device 110 to the first light splitting device 107, and further reflected by the first light splitting device 107 to the deflection device 103. The reflected light from the target human eye reflected by the deflection device 103 can be reflected by the first beam splitter 107 to the second beam splitter 110 and transmitted through the second beam splitter 110 before being transmitted to the aperture matching assembly 106 and further to the light detector 104.
In other embodiments of the present disclosure, referring to fig. 2B, there is shown a second convex lens 109 and a second light splitting device 110 of the wide field of view optotype apparatus 100, and the optotype light provided by the optotype assembly 108 is reflected by the second light splitting device 110 to the transitional optical assembly 105 after being imaged by the second convex lens 109, and is then projected to the target human eye 200 via the transitional optical assembly 105.
Wherein the aperture-dividing means 111 is in a conjugate position with the deflection means 103.
Fig. 3 is a schematic view of a field of view of a retina that can be illuminated by a large field of view optometry device 100 of one embodiment of this disclosure.
Referring to fig. 2A and fig. 3, at a certain field angle of the first dynamic optical path or the second dynamic optical path, the measuring process of the diopter of the target human eye is:
the light emitted from the light source 101 is collimated by the first convex lens 102 (e.g., collimator lens) into a parallel light beam, passes through the first spectroscopic device 107, is reflected by the deflection device 103, enters the transitional optical component 105, enters the target human eye 200, and is collected on the retina.
The backward reflection light on the retina of the human eye enters the aperture division device 111 and the photodetector 104 after passing through the transition optical component 105, the deflection device 103, the first beam splitter 107 (reflection), the second beam splitter 110 (transmission) and the aperture matching component 106, respectively.
The wavefront aberration information reflected by the human eye is divided into sub-units by the aperture dividing device 111 and then acquired by the optical detector 104, and the wavefront aberration information of the human eye is obtained by using a wavefront restoration algorithm, so that the measurement of diopter of the human eye is completed.
Referring to fig. 3, the diopter measurement of the fovea of the macula retinae when the deflection device 103 is in the central position, shown in the black dots in fig. 3; when the deflection device 103 swings about the first direction or the second direction described above to form the first dynamic optical path or the second dynamic optical path, the large field of view optometry device of the present disclosure is able to obtain peripheral area diopters of the retina at the current field of view angle from different rotation angle measurements, as indicated by the white dots in fig. 3.
The deflection device 103 described above in this disclosure may be a mechanical galvanometer, an electrically tuned galvanometer, a piezoelectric optical tuned galvanometer, or the like. The first and second light splitting devices 107 and 110 described above in this disclosure may be proportional beamsplitters, apertured mirrors, dichroic beamsplitters, and the like.
Fig. 4 is a graph of diopter information obtained by a large field of view optometry device of one embodiment of the present disclosure.
Referring to fig. 3 and 4, before measuring diopter with a large field of view, the large field of view optometry device of the present disclosure uses a point light source as an example of a light source 101, first performs alignment between a target human eye 200 and the large field of view optometry device 100, so as to ensure that the visual axis of the target human eye coincides with the optical axis of the large field of view optometry device 100, and may use a human eye retina light spot collected by a light detector 104 (for example, a CCD camera) as an alignment criterion, or use a human eye pupil image position as an alignment criterion.
The following is a process of large field diopter measurement of one embodiment of the present disclosure.
The target human eye 200, i.e. the measured eye, is fixed to the optotype assembly 108, and the deflection device 103 performs two-dimensional rotation in the X-direction (first direction) and the Y-direction (second direction) based on the central field of view, and synchronizes the rotation signal of the deflection device 103, the switching signal of the light source part 101, and the acquisition signal of the light detector 104, and completes diopter measurement at each preset rotation angle. As shown in fig. 3, the central black point represents the macula fovea corresponding to the visual axis on the retina, a rectangular coordinate system is established by the macula fovea, diopter measurement is performed at the corresponding positions of + -5 degrees, + -10 degrees, + -15 degrees, + -20 degrees, + -25 degrees, + -30 degrees, + -35 degrees, + -40 degrees, + -45 degrees, + -50 degrees and … degrees in the X-direction and Y-direction, and the parafovea large visual field diopter can be finally obtained.
The diopter information map (topographic map) obtained by measurement is shown in fig. 4.
In the diopter measurement process based on the large-field optometry device, in order to ensure the accuracy of measurement results, the measurement speed needs to be ensured, so that the deflection angle interval and the maximum deflection angle of the deflection device 103 can be adjusted according to actual use conditions, and the maximum deflection angle is proper to be +/-40 degrees in general; the deflection angle interval can be different at different positions from the central view field, and a person skilled in the art can adjust the angle interval, the maximum deflection angle and the like under the teaching of the technical proposal of the disclosure, which all fall into the protection scope of the disclosure,
In some embodiments of the present disclosure, to more accurately obtain reflected light information of the fovea vicinity of the macula lutea, sampling is dense when closer to the central field of view, and sampling is sparse when farther from the central field of view, for example, diopter measurements are made at positions corresponding to ±3 degrees, ±6 degrees, ±10 degrees, ±15 degrees, ±20 degrees, ±25 degrees, ±30 degrees, ±40 degrees in the X-direction and Y-direction, respectively.
After the large-field diopter is obtained based on the obtained human eye optical characteristics, the transition optical component 105 can generate defocus and astigmatism values corresponding to the diopter result at each field position according to the diopter result at the position, so that the large-field diopter correction is completed.
After the diopter correction of the human eye is completed, the deflection devices 103 are respectively positioned at different deflection angles, and at this time, the tested person completes the measurement of the visual function of the large visual field by observing the test task presented in the optotype component 108 of the large visual field optotype device 100. The measurement of visual functions may include contrast sensitivity measurement, sharpness of vision measurement, contrast vision measurement, red-green balance measurement, color vision inspection, and the like, depending on the visual task.
Fig. 5A and 5B are schematic structural views of a wide-field optometry device of two further embodiments of the present disclosure.
Referring to fig. 5A and 5B, unlike the large-field optometry apparatus shown in fig. 2A and 2B, the large-field optometry apparatus of these embodiments configures an imaging objective lens 112 between a caliber matching unit 106 and a photodetector 104 to explain a diopter measurement process by expanding a light source as an example of the light source portion 101.
Taking fig. 5B as an example, at a fixed field angle, the diopter measurement process is:
the light source part 101 emits an extended target image, such as a circle, and images the retina of the target human eye 200 through the first convex lens 102, the first spectroscopic device 107, the deflection device 103, the second spectroscopic device 110, and the transition optical assembly 105.
After the backward reflected light on the retina of the target human eye passes through the optical component 105, the second beam splitter 110, the deflection device 103, the first beam splitter 107, and the aperture matching component 106, respectively, the imaged objective 112 is imaged on the photodetector 104 (for example, a CCD camera), and due to the influence of the refractive power of the human eye, the image of the light source 101 on the CCD camera is elliptical, and its general expression is:
e+fXY+gX 2 +hY 2 =0, and the elliptic equation can be determined by solving the value of e, f, g, h by substituting the equation according to the coordinate value on the elliptic equation.
The included angle between the elliptic short axis and the x-axis in the Cartesian coordinate system is alpha, and the rotation axis equation is calculated
Substitution of x=xcos α -ysina and y=xsin α+ycos α into the above-determined elliptic equation, elimination of the XY-post elliptic equation, reduces to:
x 2 /a 2 +y 2 /b 2 ＝1
where a is the sphere power of the measured eye, b-a is the astigmatism power of the measured eye, α is the astigmatism axis, and in particular, when a=b, the measured target human eye has no astigmatism power.
Measuring the diopter of the fovea of the macula retinae when the deflection device 103 is in the central position; as the deflection device 103 rotates, the peripheral diopter of the retina at the current field angle is measured.
Before large-field diopter measurement, the alignment of the target human eye 200 and the large-field optometry device 100 is performed first, so as to ensure that the visual axis of the target human eye coincides with the optical axis of the large-field optometry device 100, and the human eye retina light spot collected by the light detector 104 (for example, a CCD camera) can be used as an alignment basis, and the position of the human eye pupil image can also be used as an alignment basis.
The following is a procedure for large field diopter measurement of this embodiment.
The measured eye, i.e. the target human eye 200, is fixedly seen by the optotype assembly 108, the deflection device 103 performs two-dimensional rotation in the x-direction and the y-direction based on the central field of view, and the rotation signal of the deflection device 103, the switching signal of the extended light source and the acquisition signal of the CCD camera are synchronized to complete diopter measurement under each preset rotation angle. Still referring to fig. 3, the central black point represents the macula fovea corresponding to the visual axis on the retina, a rectangular coordinate system is established by the macula fovea, diopter measurement is performed at the positions corresponding to +/-5 degrees, +/-10 degrees, +/-15 degrees, +/-20 degrees, +/-25 degrees and +/-30 degrees in the x-direction and y-direction respectively, and finally diopter within the field of view of +/-30 degrees of the paracentric fovea can be obtained.
After measuring and obtaining the diopter with large field of view, the transitional optical component 105 can generate corresponding defocus and astigmatism values according to the diopter result at each field of view position, so as to complete the correction of diopter with large field of view.
After the diopter correction of human eyes is completed, the deflection devices 103 are respectively positioned under different deflection angles, and a tested person completes the measurement of the visual function of the large visual field by observing the test task presented in the visual target assembly 108 of the large visual field optometry device. The measurement of visual functions may include contrast sensitivity measurement, sharpness of vision measurement, contrast vision measurement, red-green balance measurement, color vision inspection, and the like, depending on the visual task.
In particular, the wide-field optometry apparatus of the present disclosure is capable of performing diopter measurement tasks, visual function measurement tasks of a zero degree field of view when the deflection device 103 is not deflected.
Fig. 6A is a binocular structured large field refraction system of one embodiment of the present disclosure. Fig. 6B is a binocular structured large field refraction system of another embodiment of the present disclosure.
Referring to fig. 6A and 6B, the wide-field optometry system of the present disclosure includes two wide-field optometry devices 100 of any one of the above-described embodiments of the present disclosure for performing human eye optical feature acquisition for the left and right eyes, respectively. Two large field of view optometry devices 100 are symmetrically arranged.
The binocular structured large-view-field optometry system and the optometry method can finish monocular measurement and binocular simultaneous measurement, and the optometry method is the same as the method described above when monocular measurement is realized; before binocular measurement, binocular alignment is needed to be carried out firstly to realize vision fusion, and then binocular large-view-field objective diopter measurement and subjective vision function measurement are carried out.
Measurement of visual functions according to visual tasks, in addition to contrast sensitivity measurement, visual acuity measurement, contrast vision measurement, red-green balance measurement, and the like, which can be performed by a single eye, binocular balance measurement, binocular simultaneous vision measurement, binocular fusion measurement, binocular stereoscopic vision measurement, and the like can be performed.
In the description of the present specification, reference to the terms "one embodiment/manner," "some embodiments/manner," "example," "a particular example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/manner or example is included in at least one embodiment/manner or example of the present disclosure. In this specification, the schematic representations of the above terms are not necessarily for the same embodiment/manner or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/modes or examples described in this specification and the features of the various embodiments/modes or examples can be combined and combined by persons skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present disclosure, the meaning of "a plurality" is at least two, such as two, three, etc., unless explicitly specified otherwise.
It will be appreciated by those skilled in the art that the above-described embodiments are merely for clarity of illustration of the disclosure, and are not intended to limit the scope of the disclosure. Other variations or modifications will be apparent to persons skilled in the art from the foregoing disclosure, and such variations or modifications are intended to be within the scope of the present disclosure.
Claims (10)
1. The human eye optical characteristic acquisition method based on the dynamic light path is characterized by comprising the following steps of:
constructing initial detection light;
dynamically adjusting the light path of the initial detection light to form a first dynamic light path which is dynamically adjusted in a first direction so as to irradiate a target human eye based on the first dynamic light path and measure the reflected light of the target human eye to obtain first reflected light information;
Dynamically adjusting the light path of the initial detection light to form a second dynamic light path which is dynamically adjusted in a second direction so as to irradiate the target human eye based on the second dynamic light path and measure the reflected light of the target human eye to obtain second reflected light information; and
acquiring optical characteristics of the target human eye based on the first reflected light information and the second reflected light information;
wherein the first direction is different from the second direction such that an illuminated area of the first dynamic light path on the retina of the target human eye and an illuminated area of the second dynamic light path on the retina of the target human eye have non-overlapping areas.
2. The method of claim 1, wherein the initial detection light is a parallel light beam.
3. The dynamic light path-based human eye optical characteristic acquisition method according to claim 1, wherein the first dynamic light path is configured to be able to be irradiated to the macular fovea and the two side regions of the macular fovea of the target human eye in the first direction, and the second dynamic light path is configured to be able to be irradiated to the macular fovea and the two side regions of the macular fovea of the target human eye in the second direction.
4. The method according to claim 3, wherein the first dynamic optical path is configured to irradiate two or more times to both side regions of the macula fovea in the first direction, and the second dynamic optical path is configured to irradiate two or more times to both side regions of the macula fovea in the second direction.
5. The method according to claim 4, wherein the first dynamic optical path is configured to perform a first irradiation on both side regions of the fovea in the first direction and then perform a second irradiation, and the second dynamic optical path is configured to perform a first irradiation on both side regions of the fovea in the second direction and then perform a second irradiation.
6. The method of claim 4, wherein the first direction is a horizontal direction and the second direction is a vertical direction.
7. The method for acquiring the optical characteristics of the human eye based on the dynamic light path according to claim 4, wherein the reflected light of the target human eye is acquired in a uniform or non-uniform manner during the process of irradiating the target human eye by the first dynamic light path to acquire the first reflected light information;
The non-uniform mode is configured to collect reflected light in a mode that sampling points are gradually dense or gradually sparse in the process that the first dynamic light path irradiates towards two side areas of the macula lutea fovea.
8. The dynamic light path-based human eye optical characteristic acquisition method according to any one of claims 1 to 7, wherein reflected light of a target human eye is acquired in a uniform or non-uniform manner during irradiation of the target human eye by the second dynamic light path to obtain the second reflected light information;
the non-uniform mode is configured to collect reflected light in a mode that sampling points are gradually dense or gradually sparse in the process that the second dynamic light path is irradiated to two side areas of the macula lutea fovea;
optionally, the illumination and reflected light measurement based on the first dynamic light path is performed synchronously for both eyes, and the illumination and reflected light measurement based on the second dynamic light path is performed synchronously for both eyes;
optionally, in the process of synchronously performing the irradiation based on the first dynamic optical path and the reflected light measurement for both eyes, the scanning direction of the first dynamic optical path for the left eye is opposite to the scanning direction of the first dynamic optical path for the right eye;
In the process of synchronously performing the irradiation and the reflected light measurement based on the second dynamic light path for both eyes, the scanning direction of the second dynamic light path for the left eye is also opposite to the scanning direction of the second dynamic light path for the right eye.
9. A large field of view optometry for performing the human eye optical feature acquisition method of any one of claims 1 to 8, comprising:
a light source section for emitting initial light;
a first convex lens that converts the initial light into a parallel light beam as the initial detection light;
a deflection device configured to be reciprocally deflectable in a first direction to reflect the initial detection light to form a first dynamic light path dynamically adjusted in the first direction, the deflection device configured to be reciprocally deflectable in a second direction to reflect the initial detection light to form a second dynamic light path dynamically adjusted in the second direction; and
the optical detector is used for detecting the reflected light of the target human eye so as to obtain the first reflected light information and the second reflected light information;
optionally, the light source part includes a point light source or an extended light source;
Optionally, the method further comprises:
the transition optical component is configured between the deflection device and the target human eye, so that the deflection center of the deflection device and the pupil of the target human eye are positioned at conjugate positions, and the first dynamic light path and the second dynamic light path can be converged on the retina of the target human eye after passing through the transition optical component;
optionally, the transition optical assembly comprises a transmissive/reflective 4f system in combination with a cylindrical lens group, a liquid lens, a anamorphic mirror, or a liquid crystal spatial light modulator;
optionally, the method further comprises:
the aperture matching component is configured between the deflection device and the light detector and is used for adjusting the beam aperture of the reflected light from the target human eye reflected by the deflection device so as to be suitable for the light detection aperture of the light detector;
optionally, the aperture matching component is implemented by a lens group;
optionally, the method further comprises:
a first spectroscopic device disposed between the first convex lens and the deflection device such that the initial detection light can pass through the first spectroscopic device and be transmitted to the deflection device, and the reflected light from the target human eye reflected via the deflection device can be reflected by the first spectroscopic device to be transmitted to the aperture matching assembly and thus to the photodetector;
Optionally, the method further comprises:
the optotype component can project the optotype provided by the optotype component to different areas of the retina of the target human eye through the first dynamic light path and the second dynamic light path;
optionally, the method further comprises:
the sighting target light provided by the sighting target assembly is collimated by the second convex lens, then reflected to the first light-splitting device by the second light-splitting device, and further reflected to the deflection device by the first light-splitting device;
optionally, the reflected light from the target human eye reflected by the deflection device can be reflected by the first light splitting device to the second light splitting device and transmitted by the second light splitting device to the aperture matching assembly and then to the light detector;
optionally, the photodetector is in a conjugate position with the deflection device;
optionally, the large field of view optometry device is capable of performing diopter measurements and/or vision function measurements of a field of view of zero degrees when the deflection means is not deflected.
10. An optometric system, comprising:
two large field optometry devices of claim 9 for performing human eye optical feature acquisition for the left and right eyes, respectively.
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