CN106037625A - Measuring device for dynamic visual lobe and measuring method thereof - Google Patents
Measuring device for dynamic visual lobe and measuring method thereof Download PDFInfo
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- A61B3/02—Subjective types, i.e. testing apparatus requiring the active assistance of the patient
- A61B3/024—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for determining the visual field, e.g. perimeter types
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Abstract
The invention relates to a measuring device for dynamic visual lobe and a measuring method thereof, belonging to the technical field of visual cognition measurement. The device comprises a client computer provided with a display screen, a mouse and a data processor installed therein and a measuring assistant positioning tool. The method comprises the steps of constructing two test figures as a searching interface, enabling a subject to judge a target identification tag in a first figure, recording a judgment result, and determining the visual field boundary point in each axial direction of the first figure; and using the obtained visual field boundary points of all axial directions to draw a visual field shape figure, and storing a measurement result and displaying the same on the display screen. The measuring device has the advantages that the operation cost is low; the operation is convenient; simultaneous online measurement of multiple people can be met; the measuring method is simple and feasible; the measuring requirements of different conditions can be met; and the displayed measurement result has the visual field shape figure and a shape index value, so that the qualitative and quantitative analysis requirements can be met simultaneously.
Description
Technical field
The invention belongs to visual cognition field of measuring technique, particularly relate to a kind of dynamic function visual field (Dynamic
Visual Lobe) measurement apparatus and method.
Background technology
The definition in the function visual field (Visual Lobe) is that people can find that when single is stared visual search destination probability is big
In or equal to 50% location point constitute regional ensemble.A.H.S.Chan and D.K.T.So is being published in periodical
The paper Measurement of volume 36 in 2006 of International Journal of Industrial Ergonomics
And quantification of visual lobe shape characteristics propose a kind of solidifying based on single
The search mission repeated measure finding target recognition label in apparent time from the most identical vision distracter obtains function
Viewing field shape and the method for Shape Indexes, and develop a set of process of measurement VLOMS (static vision field measurement) system.
The search interface that the measuring method that Chan and So proposes is provided is as shown in Figure 1.Interface comprises a series of uniform row
The symbol of cloth, in addition to 1 different symbol (in figure zero), other all symbols (in figure ×) it is all same-sign,
As distracter, 1 different symbol is target recognition label.Time (the 300ms that tester's single is stared is presented at this interface
Left and right, can be arranged voluntarily) disappear afterwards, originally distracter and target recognition label position by "+" cover.Tester uses mouse point
Hit target recognition label position "+"；If tester does not see the target recognition label in search interface, then use Mus
Punctuate hit optional position "+", task terminates afterwards, carries out search mission next time.Task and appointing of being over next time
It is engaged in identical, but target can appear randomly in other positions, interface.Measurement system can record every subtask tester and use mouse point
The target location hit is the most correct, and judges after every subtask terminates whether perimetry completes.When perimetry completes,
In the search mission being over, target recognition label all occurs twice in all positions being likely to occur, say, that for
For any search mission, certain before or after this subtask also have and the target recognition of for once search mission
Label occurs with the target of this search mission, position occurs that position is identical.After measurement process terminates, the method is according to searching every time
Whether the position that all targets had been occurred by the result that rope task is the most correct is judging within sweep of the eye, it is determined that
According to being, for optional position, twice search mission is once above correct, i.e. thinks that this position is within sweep of the eye.All
The regional ensemble constituted in position within the vision is field range, and provides viewing field shape figure, viewing field shape based on this
Index, including visual field area, girth, circularity, boundary light slippery, symmetry etc..
Search interface used by the method is static images, and individuality search interface when identifying target is actionless,
Thus the static function visual field can only be measured.In actual production is lived, major part visual scene is all dynamic scene, such as, drive
Sight, luggage X-ray machine safety check etc..R.F.Yu and A.H.S.Chan is being published in periodical Human Factors and
The paper of the 3rd phase of volume 25 in 2015 of Ergonomics in Manufacturing&Service Industries
Display movement velocity and dynamic visual search performance points out in dynamic case
Lower visual search characteristic and static case are different, it is therefore necessary to measure the dynamic function visual field.
The definition in the dynamic function visual field is: in searchers watches region of search attentively a fixation point at the uniform velocity moved, make eyeball
When keeping constant rotation, the probability that the region of search searched person of target recognition label the recognizes location point structure more than or equal to 50%
The regional ensemble become.There is no dynamic function visual field measuring tool and method at present.
Summary of the invention
The present invention seeks to the blank for filling up prior art, propose a kind of dynamic function visual field measuring device and measurement thereof
Method.The measurement apparatus operating cost that the present invention proposes is low, and simple operation can meet that many people are online to measure simultaneously；Measuring method
Simple；Tester i.e. comes i.e. to survey, it is not necessary to other prepare；Measure parameter can arrange voluntarily, meet the survey under different situation
Examination requirement；The measurement result existing viewing field shape figure be given has again shape desired value, can meet qualitative and quantitative analysis simultaneously
Requirement.
The kinetic perimetry measuring method that the present invention proposes is that the measurement apparatus using the present invention allows tester that phase is repeated several times
Same dynamic vision identification mission, every subtask terminates rear system and determines, according to recognition result, the position that target occurs next time,
At the end of all tasks, provide viewing field shape figure and desired value according to recognition result, including visual field area, girth, circularity, limit
Boundary's smoothness, symmetry, ductility and systematicness etc..
The present invention propose a kind of dynamic function visual field measuring device, it is characterised in that this device by be furnished with display screen,
Mouse and the internally installed client computer having data processor and measurement auxiliary locating tool are constituted；This location instrument is positioned at
The front of display screen is coaxial with display screen center, for subtest person's head location and keeps not in test process
Become；This data processor is previously stored with dynamic function perimetry program, for obtaining the dynamic function visual field of tester
As a result, this mouse inputs observed information for tester, this display screen for tester's interactive information show measurement knot
Really.
Apparatus of the present invention also include multiple stage client computer and measure auxiliary locating tool accordingly, and increase a master
Machine end computer, every client computer is provided with web browser, in the data processor in host side computer in advance
Storage has dynamic function perimetry program；Every client computer is connected with host side computer by network respectively, many
Individual tester uses client computer to carry out dynamic function perimetry.
The method that the present invention also proposes to use above-mentioned measurement apparatus to carry out dynamic function perimetry, it is characterised in that tool
Body comprises the following steps:
1) two kinds of resolution charts of structure are as search interface: every kind of figure is formed by a fixation point and multiple contact,
This contact is distributed in the multiple concentric circumferences with this fixation point as starting point and on a plurality of radial axis, adjacent two axial
Angle is equal, same axially on contact spacing equal；Fixation point and each contact are arranged an identification label, the first test
Figure have three kinds of different identification labels, respectively fixation point stare on label, radial axis a selected contact
Target labels, and the interference label of remaining contact；The second resolution chart have two kinds of different identification labels, be respectively solidifying
The covering label staring label and all contacts of viewpoint, uses computer display display search interface, at this search interface
The upper foundation plane coordinate system with fixation point as initial point；The corresponding coordinate figure in each contact；Two kinds of resolution charts and dynamic function
Perimetry program is stored in advance in host side computer；
2) the target recognition label in the first figure is judged by tester, and records judged result: specifically include:
2-1) display screen showing, the fixation point of described search interface figure from left to right moves horizontally along x-axis；When this
When point is close to display screen central authorities, display screen demonstrates the first the graphic searching interface with this fixation point as the center of circle, this figure
Shape also then continues to move right after center Screen arrives the single gaze duration set, and the first figure disappears；Aobvious
In display screen at the first figure disappearance, the second figure occurs；
The second figure of the target recognition label position of the first figure during 2-2) tester remembers with click
The contact covering label in shape；
2-3) judge that whether the coordinate of click contact position is the place, target recognition label contact of the first figure
The coordinate of position, and identification or Unidentified judged result are stored in a data processor；
3) according to step 2) determination methods determine in the first figure each axially on visual field boundary point；
4) by obtain all axially on visual field boundary point be depicted as viewing field shape figure and be stored in host side computer
And show in client display screen；Viewing field shape figure demonstrates viewing field shape desired value, including visual field area, girth, circle
The indexs such as degree, boundary light slippery, symmetry, ductility and systematicness；
5) test terminates.
The feature of measurement apparatus that the present invention proposes and providing the benefit that:
(1) process of measurement is arranged on host side, and client is not required to install other programs, uses web browser to visit
Ask, easy to use.
(2), after main frame networking, any computer that can network can serve as client, can many people exist on a large scale
Line is measured simultaneously.
(3) gauger i.e. comes i.e. to survey, it is not necessary to other prepare.
(4) easy to use, easy left-hand seat, user can use after simple declaration is introduced, it is not necessary to grasps other
Professional knowledge.
(5) every measurement parameter is (when target recognition label and the size of distracter, spacing, quantity, movement velocity, display
Long) can arrange voluntarily, meet the test request under Different Dynamic visual task situation.
(6) the measurement result existing viewing field shape figure be given has again shape desired value, can meet qualitative and quantitative point simultaneously
The requirement of analysis.
The feature of measuring method that the present invention proposes and providing the benefit that:
(1) measuring principle is simple, it is easy to operation is implemented.
(2) have only to disclosure satisfy that computer and the display of web browser service requirement, and the auxiliary equipment of necessity,
Need not other instrument and equipments.
(3) mechanism that tester's binocular that the method uses follows the trail of mobile red point can ensure that test when search mission occurs
Center of vision at red point, ensured the accuracy of measurement result.
(4) this measuring method will not allow tester have uncomfortable reaction, also will not have undesirable effect its physical and mental health.
Accompanying drawing explanation
Fig. 1 is the search mission interface of existing VLOMS system.
Fig. 2 is the method overall flow block diagram of the inventive method.
Fig. 3 is the first pictorial diagram of search interface of the inventive method.
Fig. 4 is search interface the second pictorial diagram of the inventive method.
Fig. 5 is the screen change schematic diagram identifying process in the inventive method.
Fig. 6 is the FB(flow block) determining visual field boundary method in the inventive method.
Fig. 7 is the example structure schematic diagram of apparatus of the present invention.
Detailed description of the invention
The measurement apparatus in a kind of dynamic function visual field that the present invention proposes and measuring method thereof, below in conjunction with the accompanying drawings and specifically
Embodiment further describes as follows.
The measurement apparatus in a kind of dynamic function visual field that the present invention proposes, it is characterised in that this device is by being furnished with display screen
Curtain, mouse and the internally installed client computer having data processor and measurement auxiliary locating tool are constituted；This location instrument
The front being positioned at display screen is coaxial with display screen center, for subtest person's head location and keeps in test process
Constant；This data processor is previously stored with dynamic function perimetry program, regards for obtaining the dynamic function of tester
Wild result, this mouse inputs observed information for tester, this display screen for tester's interactive information show measurement
Result.
This device may also include multiple stage client computer and measures auxiliary locating tool accordingly, and increases a main frame
End computer, every client computer is provided with web browser, pacifies in advance in the data processor in host side computer
Dress dynamic function perimetry program (client computer can no longer install this process of measurement)；Every client computer is respectively
Being connected with host side computer by network, multiple testers use client computer to carry out dynamic function perimetry.
The measuring method in a kind of dynamic function visual field using above-mentioned measurement apparatus that the present invention proposes, its entirety of the method
FB(flow block) is as in figure 2 it is shown, to be embodied as step as follows:
1) two kinds of resolution charts of structure are as search interface, and two kinds of graphic structures are identical, and label is different, only the first figure
Shape has target recognition label；Specifically include: every kind of figure is formed by a fixation point and multiple contact, and this contact is distributed in
In I the concentric circumferences with this fixation point as starting point and on the radial axis of J bar, adjacent two axial angles are equal, same
Contact spacing on Zhou Xiang is equal, I and J is positive integer, 4≤I≤9,10≤J≤20；Fixation point and each contact are arranged
One identifies label, the first resolution chart have three kinds of different identification labels, respectively fixation point stare label, radial
The target labels of a contact selected on axis, and the interference label of all contacts；The second resolution chart have two kinds not
Same identification label, the respectively covering label staring label and remaining contact of fixation point, use computer display to show
Search interface, sets up the plane coordinate system with fixation point as initial point on this search interface；The corresponding coordinate figure in each contact；Two
Plant resolution chart and dynamic function perimetry program is stored in advance in host side computer；
The first resolution chart in the search interface of the present embodiment, as it is shown on figure 3, this contact has 180, is uniformly distributed
In 9 concentric circumferences with fixation point as starting point and a plurality of radial Axis Cross point；With this fixation point as starting point
20 radial axis on, adjacent two axial angles are 18 °；This fixation point is zero, each contact correspondence one
Coordinate figure；In the present embodiment, stare identification label be solid red circle, disturbance ecology label be that white crosses pitches "×", mesh
Mark distinguishing label is white hollow circle "○"；The second resolution chart as shown in Figure 4, has two kinds of different identification labels, point
Not for fixation point be solid circles stare label and remaining contact plus sige "+" cover label.
2) the target recognition label in the first figure is judged by tester, and records judged result, including:
Display screen 2-1) showing, the fixation point of described search interface figure at the uniform velocity moves along x-axis from left to right level；
When this point is close to display screen central authorities, demonstrate the first the search interface figure with this as the center of circle, this figure then
The setting time t (i.e. single gaze duration) that moves right, usually 300ms-500ms (the present embodiment is continued with identical speed
Take 350ms), the first figure disappears subsequently, and (at this figure of t/2 moment through center Screen, i.e. fixation point is stared label and is in
Display screen center)；, at display screen disappearance, there is the second figure in the first figure, and on screen, pattern changing process is such as
Shown in Fig. 5；
The second figure of the target recognition label position of the first figure during 2-2) tester remembers with click
The contact covering label in shape；
2-3) judge that whether the coordinate of click contact position is the place, target recognition label contact of the first figure
The coordinate of position, and will determine that result (i.e. identifying or unidentified) stores in a data processor；The present embodiment will hit contact
The coordinate of position compares with the coordinate of the position, target recognition label contact of the first figure, if both coordinate figure phases
Deng or difference then praise identification less than the half of difference of adjacent two contact coordinate values, be otherwise unidentified.
3) according to step 2) determination methods determine in the first figure each axially on visual field boundary point；
If the definition of the visual field boundary point on each axle is: with fixation point for starting point on the axial ray of this contact
The label of all contacts inside this point is all correctly validated (all within sweep of the eye), all contacts outside this contact
Label be not all correctly validated (all field range outer), then this contact be this axially on visual field boundary point.
4) by obtain all axially on visual field boundary point be depicted as viewing field shape figure and be stored in host side computer
And show in client display screen；Viewing field shape figure demonstrates viewing field shape desired value, including visual field area, girth, circle
The indexs such as degree, boundary light slippery, symmetry, ductility and systematicness；
5) test terminates.
Above-mentioned steps 3) determine in the first figure each axially on a contact be whether the concrete stream of visual field boundary point
Journey, as shown in Figure 6, comprises the following steps:
3-1) randomly choose the location point that contact, one, the first graphic searching interface occurs as target recognition label, test
Person starts to identify, if identifying correct, then judging this location point tester within sweep of the eye, entering step 3-2), if known
Not mistake, then judge that this contact, as point to be located, enters step 3-3)；
3-2) target setting identification label occur in the contact identified same axially on the contact of adjacent outer, survey
Target recognition label is identified by examination person again, if identifying correct, then judges this contact tester within sweep of the eye；Repeat
Step 3-2), target recognition label is moved outwardly to next adjacent outer contact along current axis, continues test, until setting mesh
Mark distinguishing label occurs in one contact of this axial outermost, if identifying correct, using this contact as this axle visual field boundary point,
Otherwise using the contact of this contact adjacent inboard as this axle visual field boundary point, go to step 4)；If identification mistake, then judge this phase
Adjacent points outside is point to be located, enters step 3-3)；
3-3) target recognition label is repetitively appearing in point to be located position, and tester carries out second time and identifies；If second time
Identify correct, then judge this point to be located tester within sweep of the eye, return step 3-2)；If identification mistake, then judging should
Point to be located tester not within sweep of the eye, enters step 3-4)；
3-4) target setting identification label is along being currently displaced axially inwardly to this point to be located adjacent inboard contact, tester couple
This contact carries out twice identification, if twice identification once identifying correct, then judge this contact as this axially on the visual field
Boundary point；If the equal mistake of twice identification, then the continuation of target setting identification label moves inwardly into next adjacent along current axis
Inner side carries out twice identification behind contact, until once identifying correct in twice identification of identified contact, this contact is
Visual field boundary point on this is axial.
Above-mentioned identification process is the identification process to single axial, and actual being measured as obtains more preferable result, is to all
The target recognition label axially set intersects and identifies rather than each axially identify in order.Because if identifying survey in order
By impact point occurrence law, examination person just can judge that position occurs in impact point, accordingly even when the most also just can not provide
Really judged result.Therefore, coaxial during above-mentioned identification adjacent contacts identify for twice process with several times other axially on
Identification process separates, to ensure that randomness makes judged result more accurately reflect truth.
Measuring method of the present invention can be used general programming technique to realize by programming personnel, and is pre-installed in client
In end or host side computer.
The Application Example of the present invention is as follows: a kind of survey realizing this dynamic function perimetry method that the present invention proposes
Amount device embodiment, its structure as it is shown in fig. 7, comprises: host side 1, N number of client 2, N number of measurement aid (this reality
Execute example use the chin strap of fixing tester's chin and be connected with chin strap grip support) 3, N is positive integer；Institute
State and the data processor in host side is installed dynamic function function perimetry method program that the present invention proposes in advance, N number of
Client is connected with host side by network, and host side allows M client online access simultaneously, and M is positive integer, M≤N；Often
Platform client independently measures；During measurement, a chin support is installed in each client front, makes tester's head and client
End keeps geo-stationary.
The host side of the present embodiment requires more than 2G internal memory, the computer of more than 2.0GHz dominant frequency.Described client is installed
There is the computer of web browser, accessed the process of measurement of host side by web browser (such as Chrome browser etc.).
There is a clamping device can fix on the table bottom described chin strap, height adjustable.
Need tester by chin strap before test on chin strap, adjust chin strap height and client distance to meeting measurement
Requirement, afterwards tester's login system, can start to measure according to after test request configuration relevant parameter.Measurement terminates rear system
Measurement result can be given, tester it will be seen that simultaneously result can be stored in host side data base.
The specifically used step of this device is as follows:
(1) client is positioned over horizontal table top, chin strap is fixed on desktop edge by clamping device, asks tester
Chin is positioned on chin strap, regulation chin strap height and its relative position with client Display, makes tester couple
Mesh and indicator screen distance are 60cm, and the horizontal center of vision of tester's binocular is positioned at test screen central authorities.
(2) open client, by the process of measurement of browser access host side, after entrance program, arrange translational speed,
There are the parameters such as position range with interference label sizes, label spacing, target recognition label and preserves in target recognition label.
(3) measuring task is started according to process described in measuring method until measuring and terminating.
(4) program is drawn viewing field shape figure and provides viewing field shape desired value, including visual field area, girth, circularity, border
The indexs such as smoothness, symmetry, ductility and systematicness, and measurement result is stored in host side data base, and show
On the screen of client.
Claims (6)
1. a dynamic function visual field measuring device, it is characterised in that this device is by being furnished with display screen, mouse and internally installed
There is the client computer of data processor and measure auxiliary locating tool composition；This location instrument is positioned at described display screen
Front is coaxial with display screen center, positions for subtest person's head and keeps constant in test process；At these data
Reason device is previously stored with dynamic function perimetry program, for obtaining the dynamic function visual field result of tester, this mouse
Input observed information for tester, this display screen for tester's interactive information show measurement result.
2. device as claimed in claim 1, it is characterised in that this device also includes multiple stage client computer and measures accordingly
Auxiliary locating tool, and increase a host side computer, every client computer is provided with web browser, host side meter
Data processor in calculation machine is previously stored with dynamic function perimetry program；Every client computer passes through net respectively
Network is connected with host side computer, and multiple testers use client computer to carry out dynamic function perimetry.
3. the measuring method in the dynamic function visual field using measurement apparatus as claimed in claim 2, it is characterised in that concrete
Comprise the following steps:
1) two kinds of resolution charts of structure are as search interface: every kind of figure is formed by a fixation point and multiple contact, and this touches
Point is distributed in the multiple concentric circumferences with this fixation point as starting point and on a plurality of radial axis, adjacent two axial angles
Equal, same axially on contact spacing equal,；Fixation point and each contact are arranged an identification label, and the first tests figure
The selected contact stared on label, radial axis having three kinds of different identification labels, respectively fixation point of shape
Target labels, and the interference label of remaining contact；The second resolution chart have two kinds of different identification labels, respectively stare
The covering label staring label and all contacts of point, uses computer display display search interface, on this search interface
Set up the plane coordinate system with fixation point as initial point；The corresponding coordinate figure in each contact；Two kinds of resolution charts and dynamic function regard
Wild process of measurement is stored in advance in host side computer；
2) the target recognition label in the first figure is judged by tester, and records judged result: specifically include:
2-1) display screen showing, the fixation point of described search interface figure from left to right moves horizontally along x-axis；When this point connects
During nearly display screen central authorities, display screen demonstrates the first the graphic searching interface with this fixation point as the center of circle, and this figure is also
Then continuing to move right after center Screen arrives the single gaze duration set, the first figure disappears；At display screen
In at the first figure disappearance, the second figure occurs；
During 2-2) tester remembers with click on the second figure of the target recognition label position of the first figure
Cover label contact；
2-3) judge that whether the coordinate of click contact position is the position, target recognition label contact of the first figure
Coordinate, and will identify or Unidentified judged result store in a data processor；
3) according to step 2) determination methods determine in the first figure each axially on visual field boundary point；
4) by obtain all axially on visual field boundary point be depicted as viewing field shape figure and be stored in host side computer and show
Show in client display screen；Viewing field shape figure demonstrates viewing field shape desired value, including visual field area, girth, circularity, limit
The indexs such as boundary's smoothness, symmetry, ductility and systematicness；
5) test terminates.
4. method as claimed in claim 3, it is characterised in that the definition of described visual field boundary point is: with fixation point for starting point warp
The label crossing all contacts inside this point on the axial ray of this contact is all correctly validated, all outside this contact
The label of contact be not all correctly validated, then this contact is this axle visual field boundary point.
5. as claimed in claim 3 method, it is characterised in that described step 3) determine in the first figure each axially on one
Whether contact is visual field boundary point, specifically includes following steps:
3-1) randomly choosing the location point that contact, one, the first graphic searching interface occurs as target recognition label, tester opens
Begin to identify, if identifying correct, then judging this location point tester within sweep of the eye, entering step 3-2), if the mistake of identification
By mistake, then judge that this contact, as point to be located, enters step 3-3)；
3-2) target setting identification label occur in the place, contact identified same axially on the contact of adjacent outer, test
This target recognition label is identified by person again, if identifying correct, then judges this contact tester within sweep of the eye；Repeat
Step 3-2), target recognition label is moved outwardly to next adjacent outer contact along current axis, continues test, regards until finding
Wild boundary point or target setting identification label occur in one contact of this axial outermost, if identifying correct, are made this contact
For this axle visual field boundary point, otherwise using the contact of this contact adjacent inboard as this axle visual field boundary point, go to step 4)；If known
Not mistake, then judge that this adjacent outer point, as point to be located, completes once to identify process, enter step 3-3)；
3-3) target recognition label is repetitively appearing in point to be located position, and tester carries out second time identification process；If second time
Identify correct, then judge this point to be located tester within sweep of the eye, return step 3-2)；If identification mistake, then judging should
Point to be located tester not within sweep of the eye, enters step 3-4)；
3-4) target setting identification label edge is currently displaced axially inwardly to the contact of this point to be located adjacent inboard, and tester is to this
Contact carries out twice identification, if twice identification once identifying correct, then judge this contact as this axially on limit, the visual field
Boundary's point；If the equal mistake of twice identification, then the continuation of target setting identification label moves inwardly into next adjacent interior along current axis
Carrying out twice identification behind contact, side, until once identifying correct in twice identification of identified contact, this contact is this
Visual field boundary point on Zhou Xiang.
6. as claimed in claim 5 method, it is characterised in that described step 3) described in identify during coaxial adjacent contacts
Twice identification process with several times other axially on identification process separate, to ensure that randomness makes judged result more accurately reflect
Truth.
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| CN110269586B (en) * | 2018-03-16 | 2021-10-15 | 卡尔蔡司光学国际有限公司 | Apparatus and method for capturing the field of view of a person with dark spots |
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| CN106037625B (en) | 2017-05-10 |
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