CN116035563B - Photographic measurement system for abnormal head position - Google Patents
Photographic measurement system for abnormal head position Download PDFInfo
- Publication number
- CN116035563B CN116035563B CN202310301964.9A CN202310301964A CN116035563B CN 116035563 B CN116035563 B CN 116035563B CN 202310301964 A CN202310301964 A CN 202310301964A CN 116035563 B CN116035563 B CN 116035563B
- Authority
- CN
- China
- Prior art keywords
- patient
- head
- reflecting mirror
- photographing
- imaging lens
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/107—Measuring physical dimensions, e.g. size of the entire body or parts thereof
- A61B5/1071—Measuring physical dimensions, e.g. size of the entire body or parts thereof measuring angles, e.g. using goniometers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
- A61B5/0077—Devices for viewing the surface of the body, e.g. camera, magnifying lens
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Veterinary Medicine (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Public Health (AREA)
- Physics & Mathematics (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Dentistry (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The invention relates to a photographic measurement system for abnormal head positions, which comprises a first imaging lens, a second imaging lens, a third imaging lens, a first plane reflecting mirror, a second plane reflecting mirror, a third plane reflecting mirror, a fourth plane reflecting mirror, a first shutter reflecting mirror, a second shutter reflecting mirror, a vision target and a camera, wherein the first imaging lens is arranged on the first plane reflecting mirror; the above components form three imaging light paths in different directions, wherein the first imaging light path is used for taking a lateral photograph of the head of a patient, the second imaging light path is used for taking a frontal photograph of the head of the patient, and the third imaging light path is used for taking a top photograph of the head of the patient. According to the measuring system for the abnormal head position, natural states and positive head photos of a patient can be shot in three different directions, and then, based on an image recognition technology, characteristic points of the head and the face are automatically recognized as comparison standards, so that the head torsion angle conditions of the patient in three axial directions can be accurately calculated.
Description
Technical Field
The invention belongs to the technical field of ophthalmic medical instruments, and particularly relates to a photographic measurement system for an abnormal head position. .
Background
Abnormal head position refers to a long term abnormal posture of the head, often manifested as a constant distortion of the head looking at things, a distortion of the head to one side of the shoulders, or a significant deflection of the face always in one direction. Abnormal head position generally occurs in patients with orthopaedics torticollis or ophthalmic strabismus, and is one of the most commonly adopted compensatory modes for patients with ophthalmic strabismus, and is mostly seen in paralytic strabismus, nystagmus and various special types of strabismus. Patients often move the best vision of both eyes, or vision of both eyes, to the right front by compensating for the head position.
The long-term abnormal head position can bring adverse effects to the health of the face, the cervical vertebra and the like of a patient, especially the minors with compensated head positions, if the minors are not corrected in time, the development of the face and the cervical vertebra of the patient can be seriously influenced, and the abnormal posture is attractive, so that the self-confidence and the psychological health of the patient are obviously and negatively influenced. Abnormal head position is therefore an important surgical indicator for ophthalmic strabismus correcting surgery, as well as an aspect for assessing post-operative effects. How to intuitively, rapidly and accurately measure the angle of an abnormal head position becomes a problem to be solved in clinical work.
The abnormal head position is in three dimensions with reference to the listening plane of eye movement (fig. 1), there are three axial rotations, mandibular lifting and adduction about the x-axis horizontal axis, head tilting to the left or right shoulder about the y-axis sagittal axis, and left and right facing rotations about the z-axis vertical axis, respectively. The current standard method for abnormal head position is an orthopedics protractor method, however, the orthopedics protractor method still has the defect that on one hand, the orthopedics protractor method can not measure patients which cannot be matched with the orthopedics protractor method, and on the other hand, in clinical work, patients with complex compensatory head positions, such as face rotation and head inclination, or mandibular lifting or adduction, are often encountered. The orthopaedics protractor is accurate in measuring a single head position, and can not accurately and effectively measure the mixed head position rotating along 3 axes at the same time. Therefore, there is a need for a more convenient and accurate measurement method for accurate assessment of the angle of an abnormal head position, particularly a compound head position.
Disclosure of Invention
The invention aims to solve the problem that the existing orthopedic protractor cannot accurately and effectively measure the mixed head position rotating along 3 axes.
In order to achieve the above purpose, the present application is implemented by the following technical schemes:
a photographic measurement system for abnormal head position comprises a first imaging lens, a second imaging lens, a third imaging lens, a fourth imaging lens, a first plane reflecting mirror, a second plane reflecting mirror, a third plane reflecting mirror, a fourth plane reflecting mirror, a first shutter reflecting mirror, a second shutter reflecting mirror, a vision target plate and a camera;
the components form three photographing optical paths in different directions, wherein the first photographing optical path is used for photographing a lateral photograph of the head of a patient, the second photographing optical path is used for photographing a frontal photograph of the head of the patient, and the third photographing optical path is used for photographing a top photograph of the head of the patient;
the first imaging lens, the first plane reflecting mirror, the second plane reflecting mirror, the first shutter reflecting mirror, the second shutter reflecting mirror and the camera form a first-direction shooting light path;
the second imaging lens, the third imaging lens, the first shutter type reflecting mirror, the second shutter type reflecting mirror and the camera form a second direction shooting light path;
the fourth imaging lens, the third plane reflecting mirror, the fourth plane reflecting mirror, the first shutter reflecting mirror and the camera form a third-direction shooting light path;
the third imaging lens is arranged at the central position of the sighting target plate.
Further, when the imaging light path in any direction is opened, the imaging light paths in the other two directions are closed.
Further, when the first-direction photographing light path is opened, the first shutter type reflecting mirror is opened, the second shutter type reflecting mirror is closed, head light rays of a patient are focused through the first imaging lens in sequence, and the first plane reflecting mirror, the second plane reflecting mirror and the second shutter type reflecting mirror reflect the head light rays and enter the camera after passing through the first shutter type reflecting mirror;
when the second-direction photographing light path is opened, the first shutter type reflecting mirror is opened, the second shutter type reflecting mirror is opened, and head light rays of a patient sequentially pass through the second imaging lens and the third imaging lens and then enter the camera;
when the third-direction photographing light path is opened, the first shutter type reflector is closed, the second shutter type reflector is closed, head light rays of a patient are focused through the fourth imaging lens in sequence, and the fourth plane reflector, the third plane reflector and the first shutter type reflector enter the camera after being reflected.
Further, when the three direction photographing optical paths are used for photographing a patient, photographing is carried out on the natural state and the normal state of the head of the patient.
Further, the first direction photographing optical path is equivalent to the photographing of the camera from the right side of the patient by 1m and the same height as the eyes of the patient; the second-direction photographing optical path is equivalent to the photographing of the camera from the front 1m of the patient and the same height as the eyes of the patient; the third-direction image pickup optical path is equivalent to a camera taking a picture from 1m directly above the top of the head of the patient.
Further, the photographing of any one of the above photogrammetry systems comprises the steps of:
s1, taking a sitting position of a patient, wherein a sighting target pattern is arranged on a sighting target plate placed in front of the patient, and a third lens is arranged at the central part of the sighting target plate;
s2, the patient looks at the optotype pattern, and natural state photographing is carried out on the head of the patient from three directions by using three-direction photographing light paths respectively;
s3, after photographing the natural state of the abnormal head position of the patient, fixing the head of the patient in an righting state, and photographing the head of the patient righting from three directions by using three-direction photographing light paths respectively;
s4, using an image recognition technology, respectively selecting a set number of mark points and mark lines in three directions to automatically recognize photographed images, and comparing the angle difference values of the mark lines in the natural state and the normal state of the patient to obtain specific quantitative angles of head torsion of the patient in three axes.
Further, the marking lines in the first direction comprise a connection line of the front edge of the tragus and a connection line of the highest point of the forehead and the nose tip; the mark line in the second direction comprises a double-lug highest point connecting line and a double-eyebrow highest point connecting line; the sign line in the third direction is a double-lug tip line.
The beneficial effects of the invention are as follows:
according to the measuring system for the abnormal head position, natural states and positive head photos of a patient can be shot in three different directions, and then, based on an image recognition technology, characteristic points of the head and the face are automatically recognized as comparison standards, so that the head torsion angle conditions of the patient in three axial directions can be accurately calculated.
Drawings
Fig. 1 is a schematic plan view of an abnormal head in three-dimensional space with reference to eye movement.
FIG. 2 is a schematic plan view of an abnormal head position photogrammetry system according to the present invention.
FIG. 3 is a schematic plan view of another direction of the system for measuring abnormal head position according to the present invention.
Fig. 4 is a schematic view of a reticle and a third imaging lens.
Fig. 5 is a schematic view of a optotype plate imaging.
Fig. 6 is a schematic diagram of an equivalent optical path of the first image capturing optical path.
Fig. 7 is a schematic diagram of imaging of the first imaging optical path.
Fig. 8 is a schematic diagram of an equivalent optical path of the second image capturing optical path.
Fig. 9 is a schematic diagram of imaging of a second imaging optical path.
Fig. 10 is a schematic diagram of an equivalent optical path of the third image capturing optical path.
Fig. 11 is a schematic diagram of imaging of a third imaging optical path.
FIG. 12 is a flowchart of a photographing step of the photographing measurement system of the present invention.
Fig. 13 is a schematic view of three directional markers of a patient.
Description of the reference numerals
1-patient; 2-a first imaging lens; 3-a first planar mirror; 4-a second imaging lens; 5-a third imaging lens; 6-a view board; 7—a second planar mirror; 8—a first shutter mirror; 9-a camera; 10-a third plane mirror; 11-a second shutter mirror; 12-a fourth planar mirror; 13-a fourth imaging lens; 1a- -tragus leading edge connection; 1 b-the highest point of the forehead is connected with the nose tip; 2a- -binaural highest point connection; 2b- -connecting lines of the highest points of the double eyebrows; 3a- -a binaural tip connection; 6 a-imaging of the reticle.
Detailed Description
The following detailed description of the present invention is provided by way of example only, and is not to be construed as limiting the scope of the invention.
As shown in fig. 2 and 3, the present application discloses a photographic measurement system for abnormal head position, which includes a first imaging lens 2, a second imaging lens 4, a third imaging lens 5, a fourth imaging lens 13, a first plane mirror 3, a second plane mirror 7, a third plane mirror 10, a fourth plane mirror 12, a first shutter mirror 8, a second shutter mirror 11, a sighting target plate 6 and a camera 9, and further includes other components adapted to the above components, and these adapted components are only for ensuring the applicability of the above components, and a person skilled in the art may perform corresponding designs as required, but at least needs to include the above components to implement the functions of the photographic measurement system.
The key point of the photographic measurement system is that the photographic measurement system can shoot the natural state and the positive head photo of a patient in three different directions, and then automatically identify the characteristic points of the head and the face of the patient 1 as a comparison standard based on an image identification technology, so that the head torsion angle condition of the patient in three axial directions is accurately calculated.
As shown in fig. 2 and 3, the present photogrammetry system uses the above components to form three different directional image capturing light paths, wherein the first image capturing light path is used to take a side photograph of the head of the patient, i.e. from one side, left side or right side of the head of the patient; the second photographing optical path is used for photographing the front picture of the head of the patient, namely photographing from the front of the patient; the third imaging optical path is used for taking a photograph of the top of the head of the patient, i.e. downward from the top of the head of the patient.
As shown in fig. 6 and 7, the first imaging lens, the first plane mirror, the second plane mirror, the first shutter mirror, the second shutter mirror, and the camera form a first direction imaging optical path. When photographing in the first direction, namely photographing the side face of the head of a patient in a natural state, at the moment, when a photographing optical path in the first direction is opened, a first shutter type reflector is opened, a second shutter type reflector is closed, head light rays of the patient are focused through a first imaging lens in sequence, the first plane type reflector, the second plane type reflector and the second shutter type reflector reflect, and enter a camera after passing through the first shutter type reflector, so that a photograph of the patient in the natural state in the first direction is obtained. Specifically, the first direction photographing is used for detecting abnormal conditions of lifting and adducting of the lower jaw of the head of the patient around the horizontal axis of the x-axis as shown in fig. 1, and the first photographing optical path is designed to be equivalent to the photographing of the right side 1m of the patient from the same height as the eyes of the patient by the camera.
As shown in fig. 4, 5, 8 and 9, the second imaging lens, the third imaging lens, the first shutter mirror, the second shutter mirror and the camera form a second direction image capturing optical path. The patient takes a sitting position, a sighting target pattern is arranged on a sighting target plate placed in front of the patient, a third lens is arranged at the central part of the sighting target plate, an equivalent optical path of the sighting target plate is designed to enable an imaging 6a of the sighting target plate to be at a position 5m far away from the patient, the patient looks at the sighting target pattern of the sighting target plate, and a photographer photographs the head of the patient from three directions according to a natural state and a normal state. At this time, the second direction photographing is used for detecting the abnormal condition that the head of the patient inclines to the left shoulder or the right shoulder around the sagittal axis of the y axis as shown in fig. 1, at this time, when the second direction photographing light path is controlled to be opened, the first direction photographing light path and the third direction photographing light path are both closed, specifically, the first shutter type reflecting mirror is opened, the second shutter type reflecting mirror is opened, and the head light of the patient sequentially passes through the second imaging lens and the third imaging lens and then enters the camera. The second direction photographing optical path is designed to be equivalent to a camera which photographs from the front 1m of the patient and the same height as the eyes of the patient.
As shown in fig. 10 and 11, the third imaging lens, the third plane mirror, the fourth plane mirror, the first shutter mirror, and the camera constitute a third-direction imaging optical path. When the third-direction photographing light path is opened, the first shutter type reflector is closed, the second shutter type reflector is closed, head light rays of a patient are focused through the fourth imaging lens in sequence, and the fourth plane reflector, the third plane reflector and the first shutter type reflector enter the camera after being reflected. When photographing in the third direction, the camera is used for detecting the abnormal conditions of left and right turning of the head of the patient around the vertical axis of the Z axis, and the photographing optical path in the third direction is equivalent to photographing by the camera from the position 1m right above the top of the head of the patient.
After the photographing in the natural state is completed, the head position of the patient is temporarily fixed in the righting state by people, and righting photographing in the three directions is performed.
As shown in fig. 12, the photographing of the photogrammetry system of the present application includes the steps of:
s1, taking a sitting position of a patient, wherein a sighting target pattern is arranged on a sighting target plate placed in front of the patient, and a third lens is arranged at the central part of the sighting target plate;
s2, the patient looks at the optotype pattern, and natural state photographing is carried out on the head of the patient from three directions by using three-direction photographing light paths respectively;
s3, after photographing the natural state of the abnormal head position of the patient, fixing the head of the patient in an righting state, and photographing the head of the patient righting from three directions by using three-direction photographing light paths respectively;
s4, using an image recognition technology, respectively selecting a set number of mark points and mark lines in three directions to automatically recognize photographed images, and comparing the angle difference values of the mark lines in the natural state and the normal state of the patient to obtain specific quantitative angles of head torsion of the patient in three axes.
As shown in fig. 13, the sign lines in the first direction include a tragus leading edge line 1a and a forehead highest point and nose tip line 1b; the sign lines in the second direction comprise a double-lug highest point connecting line 2a and a double-eyebrow highest point connecting line 2b; the sign line in the third direction is a binaural tip line 3a (the patient wears a unified black round cap if necessary to help expose both ears).
The foregoing description is only a few examples of the present application and is not intended to limit the present application in any way, and although the present application is disclosed in the preferred examples, it is not intended to limit the present application, and any person skilled in the art may make some changes or modifications to the disclosed technology without departing from the scope of the technical solution of the present application, and the technical solution is equivalent to the equivalent embodiments.
Claims (7)
1. The system is characterized by comprising a first imaging lens, a second imaging lens, a third imaging lens, a first plane reflecting mirror, a second plane reflecting mirror, a third plane reflecting mirror, a fourth plane reflecting mirror, a first shutter reflecting mirror, a second shutter reflecting mirror, a vision target and a camera;
the components form three photographing optical paths in different directions, wherein the first photographing optical path is used for photographing a lateral photograph of the head of a patient, the second photographing optical path is used for photographing a frontal photograph of the head of the patient, and the third photographing optical path is used for photographing a top photograph of the head of the patient;
the first imaging lens, the first plane reflecting mirror, the second plane reflecting mirror, the first shutter reflecting mirror, the second shutter reflecting mirror and the camera form a first-direction shooting light path;
the second imaging lens, the third imaging lens, the first shutter type reflecting mirror, the second shutter type reflecting mirror and the camera form a second direction shooting light path;
the fourth imaging lens, the third plane reflecting mirror, the fourth plane reflecting mirror, the first shutter reflecting mirror and the camera form a third-direction shooting light path;
the third imaging lens is arranged at the central position of the sighting target plate.
2. The abnormal head position photogrammetry system according to claim 1, wherein when the imaging optical path in either direction is on, the imaging optical paths in the other two directions are off.
3. The system according to claim 1, wherein when the first direction image capturing light path is on, the first shutter type mirror is opened, the second shutter type mirror is closed, the head light of the patient is focused by the first imaging lens, and the first plane mirror, the second plane mirror and the second shutter type mirror reflect the head light, and the head light passes through the first shutter type mirror and enters the camera;
when the second-direction photographing light path is opened, the first shutter type reflecting mirror is opened, the second shutter type reflecting mirror is opened, and head light rays of a patient sequentially pass through the second imaging lens and the third imaging lens and then enter the camera;
when the third-direction photographing light path is opened, the first shutter type reflector is closed, the head light of the patient is focused through the fourth imaging lens in sequence, and the fourth plane reflector, the third plane reflector and the first shutter type reflector enter the camera after being reflected.
4. A system for taking a photograph of an abnormal head position according to claim 3, wherein said three imaging light paths each include taking a photograph of a natural state and an in-position state of the head of the patient.
5. A photogrammetry system according to claim 3, wherein the first direction imaging path is equivalent to the camera taking a photograph from 1m to the right of the patient, at the same height as the patient's eyes; the second-direction photographing optical path is equivalent to the photographing of the camera from the front 1m of the patient and the same height as the eyes of the patient; the third-direction image pickup optical path is equivalent to a camera taking a picture from 1m directly above the top of the head of the patient.
6. The photogrammetry system for abnormal head position according to any one of claims 1 to 5, wherein the photographing of the photogrammetry system includes the steps of:
s1, taking a sitting position of a patient, wherein a sighting target pattern is arranged on a sighting target plate placed in front of the patient, and a third lens is arranged at the central part of the sighting target plate;
s2, the patient looks at the optotype pattern, and natural state photographing is carried out on the head of the patient from three directions by using three-direction photographing light paths respectively;
s3, after photographing the natural state of the abnormal head position of the patient, fixing the head of the patient in an righting state, and photographing the head of the patient righting from three directions by using three-direction photographing light paths respectively;
s4, using an image recognition technology, respectively selecting a set number of mark points and mark lines in three directions to automatically recognize photographed images, and comparing the angle difference values of the mark lines in the natural state and the normal state of the patient to obtain specific quantitative angles of head torsion of the patient in three axes.
7. The abnormal head position photogrammetry system according to claim 6, wherein the first directional marker line includes a tragus leading edge line and a forehead highest point and nose tip line; the mark line in the second direction comprises a double-lug highest point connecting line and a double-eyebrow highest point connecting line; the sign line in the third direction is a double-lug tip line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310301964.9A CN116035563B (en) | 2023-03-27 | 2023-03-27 | Photographic measurement system for abnormal head position |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310301964.9A CN116035563B (en) | 2023-03-27 | 2023-03-27 | Photographic measurement system for abnormal head position |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116035563A CN116035563A (en) | 2023-05-02 |
| CN116035563B true CN116035563B (en) | 2023-06-09 |
Family
ID=86122139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310301964.9A Active CN116035563B (en) | 2023-03-27 | 2023-03-27 | Photographic measurement system for abnormal head position |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116035563B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106618580A (en) * | 2016-12-23 | 2017-05-10 | 北京大学第医院 | Strabismus and nystagmus head position detection method, device and system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204562096U (en) * | 2015-04-02 | 2015-08-19 | 深圳市莫廷影像技术有限公司 | A kind of optometry equipment |
| EP3440499B1 (en) * | 2016-04-04 | 2021-11-24 | SMR Patents S.à.r.l. | Vehicle comprising a rear view display device with an imaging system |
| CN108447090B (en) * | 2016-12-09 | 2021-12-21 | 株式会社理光 | Object posture estimation method and device and electronic equipment |
| KR102377364B1 (en) * | 2020-07-01 | 2022-03-23 | 충남대학교병원 | Inclination measuring device, measuring method and computer program to measure the degree of tilt or rotation of the user's head through human body image analysis |
| WO2023019400A1 (en) * | 2021-08-16 | 2023-02-23 | 深圳华大生命科学研究院 | Microscopic imaging apparatus and illumination chip thereof, imaging method, electronic device, and medium |
-
2023
- 2023-03-27 CN CN202310301964.9A patent/CN116035563B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106618580A (en) * | 2016-12-23 | 2017-05-10 | 北京大学第医院 | Strabismus and nystagmus head position detection method, device and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116035563A (en) | 2023-05-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2002367536B2 (en) | Custom eyeglass manufacturing method | |
| JP4517049B2 (en) | Gaze detection method and gaze detection apparatus | |
| JP6873918B2 (en) | Tilt shift iris imaging | |
| US9335567B2 (en) | Method for manufacturing binocular loupe | |
| US20150223680A1 (en) | Handheld vision tester and calibration thereof | |
| US11116395B1 (en) | Compact retinal scanning device for tracking movement of the eye's pupil and applications thereof | |
| JP5311601B1 (en) | How to make a binocular loupe | |
| JP2019047911A (en) | Goggle type display device, visual line detection method and visual line detection system | |
| CN107647845B (en) | Model eye for fundus detection and application method thereof | |
| KR20150102941A (en) | Method for helping determine the vision parameters of a subject | |
| US20200107720A1 (en) | Calibration and Image Procession Methods and Systems for Obtaining Accurate Pupillary Distance Measurements | |
| JPH02224637A (en) | System for detecting glance | |
| CN111528786A (en) | System and method for detecting head position of strabismus compensation | |
| CN109688403A (en) | One kind being applied to perform the operation indoor naked eye 3D human eye method for tracing and its equipment | |
| CN116035563B (en) | Photographic measurement system for abnormal head position | |
| CN112336301B (en) | Strabismus measuring equipment | |
| JP3711053B2 (en) | Line-of-sight measurement device and method, line-of-sight measurement program, and recording medium recording the program | |
| CN105829955B (en) | For checking the method for mirror holder and correcting lens correctly assembled | |
| US7219995B2 (en) | Apparatus for determining the distance between pupils | |
| JP5652973B1 (en) | How to make a binocular loupe | |
| CN109758115B (en) | Guide assembly and fundus camera | |
| JPH11347016A (en) | Imaging device | |
| JP2000020703A (en) | Photographing device for fitting glasses | |
| US10649200B2 (en) | Production method for binocular loupe | |
| CN115644796B (en) | Strabismus-based AC/A detection method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |