CN104825127B - A kind of dynamic visual acuity detection method - Google Patents
A kind of dynamic visual acuity detection method Download PDFInfo
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Abstract
The invention discloses a kind of dynamic visual acuity detection method, the method includes: generates instruction according to sighting target and generates the sighting target for dynamic visual acuity detection；The size of described sighting target, moving direction, translational speed and contrast is set according to parameter；Described sighting target is exported display device, and realizes horizontal direction and move, make and there is horizontal movement speed and be easy to the dynamic visual testing sign observed；Receive testing result information, and store after testing result Information Statistics and export.Present invention achieves the test and appraisal of dynamic visual acuity during individual eye-level motion sighting target, perfect observe the visual acuity test and appraisal motion visual acuity as main contents when drawing near motion sighting target at present with individuality and check system；Additionally, inspection method operating process is succinct, checking that efficiency is high, equipment is simple and saves space, adapts to being actually needed of clinic diagnosis, can be used for careful assessment driver, athlete etc. and has higher requirements dynamic visual acuity the visual function of crowd.
Description
Technical field
The invention belongs to the psychophysics field of measuring technique of human eye visual function, be specifically related to a kind of dynamic visual acuity detection side
Method.
Background technology
The discernmible minimum visual angle of human eye is referred to as visual acuity, the most usually said vision.That tests and assesses visual acuity is normal
Being visual acuity chart inspection technique by method, without relative motion between sighting target and experimenter in the method, evaluating result reflection experimenter's is quiet
State visual acuity.When there is relative motion when between sighting target and experimenter, the minimum visual angle that tested eye can be differentiated is referred to as dynamic vision
Sensitivity.Owing to individuality needs the object of identification mostly to be in living scene, there is the dynamic object of certain movement speed, and drive,
Motions etc. and the closely-related activity of dynamic vision have the most important meaning in daily life, and dynamic visual acuity is tested and assessed
Gradually receive publicity.
Different from the subject relative direction of motion according to sighting target, dynamic visual acuity test and appraisal can be divided into again under Depth Motion state
Dynamic visual acuity test and appraisal and the dynamic visual acuity test and appraisal under horizontal movement state.When sighting target is made by far to experimenter with certain speed
And during near motion, measured visual acuity is the dynamic visual acuity under Depth Motion state.When sighting target is being subject to certain speed
When in face of examination person, certain distance does horizontal motion, measured visual acuity is the dynamic visual acuity under horizontal movement state.Deeply
Dynamic visual acuity under degree kinestate can be measured by various deep vision tester for eyesight, and is applied to driver, pilot etc.
Special occupation crowd's Assessment of visual function.But, the dynamic visual acuity test and appraisal under horizontal movement state are still only used for visual science and grind
Study carefully, not yet occur can be used for the method and apparatus that larger scale clinical checks.
At present, the method that can carry out the test and appraisal of the dynamic visual acuity under horizontal movement state has following several: (1) rotates projection
Method: with projector equipment, sighting target being projected to a reflecting mirror, reflecting mirror the most at the uniform velocity rotates, and its velocity of rotation can
Experimental concrete needs are adjusted, by this face reflecting mirror by sighting target projection to the arcuate screens made with projection screen,
Experimenter carries out identification to the sighting target on screen.In the method, the form of sighting target is unrestricted, and due to sighting target motion be by
Reflecting mirror rotates realization, and distortion free when sighting target is presented on screen, sighting target movement velocity is up to 150 °/s.But,
Equipment involved by this method is loaded down with trivial details, is only applicable to experimentation, it is impossible to for clinical practice inspection；(2) LASER Light Source
Sciagraphy: the LASER Light Source with wavelength as 633-670nm replaces projector equipment that letter sighting target is projected to reflecting mirror, and sighting target is transported
Dynamic speed is up to 150 °/s, owing to the delay effect of laser firing time can make the sighting target of high-speed motion metaboly occur,
Sighting target in the method is only letter sighting target, and the rotation still with reflecting mirror obtains dynamic visual testing sign, it is still necessary to arrange
Annular screen, is only applicable to experimentation, it is impossible to for clinical practice inspection；(3) computer program combined with fluorescent screen shows
Device projection method: obtain dynamic visual testing sign in the way of computer program combined with fluorescent panel type display, it is not necessary to rotating mirror and ring
Shape curtain, the requirement to equipment and inspection environment is more loose, owing to being restricted by fluorescent screen scintillation effect, the fortune of sighting target
Dynamic speed is less than 10 °/below s more, the highest only can reach 50 °/s, it is impossible to cover the motion of familiar object in daily life
Velocity interval (60 °/s-150 °/s), therefore can not meet the needs of actual test and appraisal.
Summary of the invention
Because the various defects of prior art, it is quick that the present invention provides one can implement dynamic vision in clinical ophthalmology diagnosis and treatment process
The method that degree checks, the method can simplify assessment process, and involved apparatus is relatively easy, be prone to purchase and occupation of land face
Long-pending little, it is simple in clinical ophthalmology diagnosis and treatment work, to carry out larger dynamic visual acuity inspection work.
For reaching above-mentioned purpose, the present invention provides a kind of dynamic visual acuity detection method, and the method includes: generate according to sighting target
Instruction generates the sighting target for dynamic visual acuity detection；The size of described sighting target, moving direction, mobile speed is set according to parameter
Degree and contrast；Described sighting target is exported display device, and realizes horizontal direction and move, make and there is level fortune
Dynamic speed is also easy to the dynamic visual testing sign observed；Receive testing result information, and store carrying out after testing result Information Statistics also
Output.
Wherein, described sighting target is the English alphabet sighting target for examination of visual acuity, and is to divide by computer graphics and image procossing
The picture of resolution at least 300dpi.
Wherein, the English alphabet of described sighting target is " H " " O " " T " " V ".
Wherein, the size setting described sighting target according to parameter includes the height that sets described sighting target, and it sets formula as sighting target
Highly=program window height × sighting target actual height/actual displayed visual field height；Wherein, program window height is that program is opened
After, the default height of the window shown over the display, in units of pixel；Sighting target actual height is regarding of pre-setting
Mark actual height on the projection screen, unit is centimetre；Actual displayed visual field height is that program window is incident upon on projection screen
Actual height, unit is centimetre.
Wherein, set according to parameter described sighting target translational speed formula as: sighting target translational speed=program window width/
The sighting target display time；Wherein, program window width is after program is opened, the acquiescence width of the window shown over the display,
In units of pixel；The sighting target display time be the developed width that is incident upon on projection screen of program window divided by sighting target at projection screen
Actual translational speed on curtain, unit is the second.
A kind of dynamic visual acuity detection method of the present invention, exports described sighting target display device, and realizes horizontal direction shifting
Move and include: first arranging sighting target display frequency f, the number of display sighting target the most per second, then with sighting target display frequency f divided by regarding
Mark movement speed v, obtains sighting target number n needing to arrange, then is equidistantly positioned in program window by this n sighting target,
And the display properties of this n sighting target is set to not visible；Finally create thread, by arranging the display properties of current sighting target
For visually, and the display properties arranging a sighting target is not visible, it is achieved visual sighting target is from left to right or from right to left
At the uniform velocity moving process.
The method of the present invention also includes: when being reduced to make conditions of streaking occur on projection screen due to sighting target movement speed v, right
Each sighting target is ranked up in order, arranges low speed and controls parameter x, and the most each sighting target sequence number controls ginseng divided by described low speed
Number x, it is impossible to the sighting target divided exactly is set to invalid sighting target, deletes, to eliminate conditions of streaking, described low speed controls parameter
X is the natural number more than 1.
Wherein, described testing result information is stored and exports the step in, design specialized charting is used for remembering
Record check result, this form domestic demand indicate visual acuity (vision) the value sighting target size input value corresponding with each vision value and with
The sighting target presenting sequence that each visual acuity (vision) value is corresponding, needs to be provided with simultaneously and fills a vacancy formula posting field for recording experimenter one
As situation, detection sighting target speed level and detection sighting target contrast.
The dynamic visual acuity detection method that the present invention provides achieves dynamic visual acuity during individual eye-level motion sighting target
Test and appraisal, perfect observe the visual acuity test and appraisal motion visual acuity inspection as main contents when drawing near motion sighting target at present with individuality
Have a medical check-up and be；Additionally, inspection method operating process is succinct, checking that efficiency is high, equipment is simple and saves space, adapts to clinic and examines
That treats is actually needed, and can be used for careful assessment driver, athlete etc. and has higher requirements dynamic visual acuity the visual function of crowd.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing skill
Art in describing the required accompanying drawing used be briefly described (note: the accompanying drawing in describing below is only that some of the present invention are real
Execute example, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to attached according to these
Figure obtains other accompanying drawing).
Fig. 1 is the flow chart of dynamic visual acuity detection method one embodiment of the present invention.
It is quick that Fig. 2 is that dynamic visual acuity detection method one embodiment of the present invention can implement dynamic vision in clinical ophthalmology diagnosis and treatment process
The method flow diagram that degree checks.
Fig. 3 is the sighting target element picture schematic diagram for projection of dynamic visual acuity detection method one embodiment of the present invention.
Fig. 4 is the dynamic visual acuity detection interface schematic diagram of dynamic visual acuity detection method one embodiment of the present invention.
Fig. 5 is the sighting target kinematic parameter control strip schematic diagram of dynamic visual acuity detection method one embodiment of the present invention.
Fig. 6 is the dynamic visual testing sign input abridged table schematic diagram of dynamic visual acuity detection method one embodiment of the present invention.
Fig. 7 is the test result charting schematic diagram of dynamic visual acuity detection method one embodiment of the present invention.
Detailed description of the invention
The embodiment of the present invention provides a kind of dynamic visual acuity detection method, and referring to Fig. 1, Fig. 1 is that the embodiment of the present invention is dynamic
The flow chart of visual acuity detection method, the method specifically includes following steps:
Step S110: generate instruction according to sighting target and generate the sighting target for dynamic visual acuity detection.
Step S120: set the size of described sighting target, moving direction, translational speed and contrast according to parameter (the most transparent
Degree).
Step S130: described sighting target is exported display device, and realize horizontal direction and move, make and there is level fortune
Dynamic speed is also easy to the dynamic visual testing sign observed.
Step S140: receive testing result information, and store after testing result Information Statistics and export.
Wherein, sighting target described in step s 110 is the English alphabet sighting target for examination of visual acuity, and passes through computing mechanism
Figure and the high definition picture of image procossing, for the picture of resolution at least 300dpi.Sighting target therein can use English alphabet
For the picture of " H " " O " " T " " V ", as described in Figure 3.In international standard visual acuity chart, the standard of twenty-twenty vision value is 1.0 (little
Number representation) or more than, its meaning is the sighting target of distinguishable 1 ' angle spatial variations, 1 ' angle sighting target refer to sighting target stroke and
Space between stroke is 1 ' angle, therefore it is required that the letter of sighting target has the structure that can carry out decile, such as in visual acuity chart
Letter e in letter " E " visual acuity chart, according to this morphologic criteria, multiple letters are used equally to visual acuity chart and make, HTVO
It it is one group therein；According to the needs in actual application, other can be selected to can be used for the sighting target conduct that visual acuity chart makes
The element of dynamic visual testing sign projection.
Wherein, including the height setting described sighting target in the step s 120 according to the size of the parameter described sighting target of setting, it sets
Determining formula is: sighting target height=program window height × sighting target actual height/actual displayed visual field height；Wherein, program window
Height is after program is opened, the default height of the window shown over the display, in units of pixel, as shown in Figure 4；
Sighting target actual height is the sighting target pre-set actual height on the projection screen, and unit is centimetre；The actual displayed visual field is high
Degree is the actual height that program window is incident upon on projection screen, and unit is centimetre.
Wherein, the formula of translational speed of described sighting target is set as sighting target translational speed=journey according to parameter in the step s 120
Sequence window width/sighting target display time；Wherein, program window width is after program is opened, the window shown over the display
Acquiescence width, in units of pixel, as described in Figure 4；The sighting target display time is that program window is incident upon on projection screen
Developed width is divided by sighting target actual translational speed on the projection screen, and unit is the second.
Wherein, in step s 130 sighting target is exported display device, and realize horizontal direction and move and include: first arrange
Sighting target display frequency f, the number of display sighting target the most per second, then with sighting target display frequency f divided by sighting target movement speed v,
Obtain sighting target number n needing to arrange, i.e. n=f/v, then this n sighting target is equidistantly positioned in program window, and will
The display properties of this n sighting target is set to not visible；Finally create thread, be can by arranging the display properties of current sighting target
Depending on, and the display properties arranging a sighting target is not visible, it is achieved visual sighting target is from left to right or the most at the uniform velocity
Moving process.
When being reduced to make, on projection screen, conditions of streaking occurs due to sighting target movement speed v, each sighting target is arranged in order
Sequence, arranges low speed and controls parameter x, and the most each sighting target sequence number controls parameter x divided by described low speed, it is impossible to the sighting target divided exactly
Being set to invalid sighting target, delete, to eliminate conditions of streaking, it is the natural number more than 1 that described low speed controls parameter x.
Low speed in low speed control parameter may be defined as sighting target and occurs the critical velocity of conditions of streaking in display process, this speed
Spend the most relevant, in the test side of one embodiment of the invention with the performance of Program Type and display device in order to realize sighting target motion
In method, control parameter as being not provided with low speed, occur in sighting target motor process time below sighting target movement velocity as little as 3 meter per second
Conditions of streaking；The basic skills that low speed controls parameter setting is existing for passing through on the premise of arranging this state modulator open port
Set the applicable selected low speed showing speed after the debugging of field and control parameter；In the method for one embodiment of the invention, test in reality
After the sighting target project effect under selected multiple test speeds being debugged under scene, think according to the effect of debugging and low speed is set
Controlling parameter is that " 5 " can meet the effect being issued to sighting target stable motion in great majority projection speed, it is therefore proposed that arrange
It is 5 that low speed controls parameter.
Wherein, in step S140, design specialized charting is used for record check result, and this form domestic demand indicates regarding quick
Sighting target size input value and the sighting target corresponding with each visual acuity (vision) value that degree (vision) value is corresponding with each vision value are put
Reflect order, need to be provided with simultaneously and fill a vacancy formula posting field for recording experimenter's ordinary circumstance, detection sighting target speed level and detection
Sighting target contrast, as shown in Figure 7.
Lift one the most again in clinical ophthalmology diagnosis and treatment process, specifically implement the embodiment of the method that dynamic visual acuity checks.
The device implementing dynamic visual acuity inspection in clinical ophthalmology diagnosis and treatment process includes that dynamic visual testing sign generates and state modulator is put down
Platform, projection projection equipment and projection screen.Dynamic visual testing sign generates with the foundation of state modulator platform based on electronic computer,
It is 1. CPU: Pentium II 300MHz or higher to the hardware requirement of this electronic computer；Minimum Pentium II 233MHz；2. internal memory:
128MB or higher, minimum 64MB；3. hard drive space: 1.5GB available hard disk space；The software environment of this electronic computer
Can be WINXP, VISTA, WIN7 or WIN8.Projection projection equipment is digital projector, and its projection image is by projection screen
After reception, the surface illuminance of screen need to reach more than 500 luxs (lux), and image overall width is 1 meter.Projection screen
For white diffuse-reflectance screen, width 1 meter or more than 1 meter, highly 1 meter or more than, be positioned at experimenter's dead ahead 4 meters.
The foundation that in the present invention, dynamic visual testing sign generates with state modulator platform is realized by following steps, thus reaches to generate dynamically
Sighting target observes the purpose of dynamic visual acuity when having varying level movement velocity dynamic visual testing sign to detect experimenter, such as Fig. 2 institute
Show:
1, make for dynamic visual acuity check sighting target: by can be used for examination of visual acuity alphabetical sighting target (example: H, O, T,
V) it is made as the high definition picture element of more than 300dpi by the method for computer graphics and image procossing, shows as sighting target
Material preserves.
2, realize sighting target motion in the horizontal direction, make and there is horizontal movement speed and be easy to the dynamic visual testing sign observed:
Realized by computer programming, and by the way of computer connects projection projection equipment, this sighting target is just being located at experimenter
Projection screen at 4 meters of front, makes experimenter can directly observe dynamic visual testing sign；Movement velocity, size to dynamic visual testing sign
And the parameter such as contrast is set, record is differentiated the time used by sighting target simultaneously: by the method for computer programming, arranges
Containing sighting target movement velocity, sighting target size, sighting target contrast settings and the control module of synchrotimer, this module will be with
The control panel form containing sighting target movement velocity, sighting target size, sighting target contrast input dialogue frame and timer presents, logical
Cross computer keyboard in the respective dialog frame of this panel, the parameters of dynamic visual testing sign to be set, by this panel
Timing viewing area can directly read the inspection time used, as shown in Figure 5.
Being embodied as strategy is:
A. playing material is selected: the sighting target high definition picture made in step (1) is as playing resource material.
B. sighting target height is calculated: 1. calculated acquisition dynamic visual acuity test program built-in sighting target height by formula.
Program built-in sighting target height (pixel)=program window height (pixel) × sighting target actual height (centimetre)/reality shows
Show visual field height (centimetre) ... ... 1.
C. sighting target translational speed is calculated: 2. calculated acquisition sighting target translational speed by formula.
Sighting target translational speed=program window width (pixel)/sighting target display time (second) ... ... ... 2.
Wherein sighting target display time (second)=actual displayed visual field width (centimetre)/sighting target actual movement on the projection screen
Speed (cel).
D. realize sighting target horizontal direction stable motion: as a example by Flash projection program, first Flash program is set and refreshes
Rate f, the namely display frequency of sighting target, the number of display sighting target the most per second, then with sighting target display frequency f divided by sighting target
Movement speed v, obtains sighting target movieclip number n needing to arrange, then by equidistant for this n sighting target movieclip
It is arranged in program window, and the display properties of this n sighting target movieclip is set to not visible；Finally create runme
Thread, is visual true by arranging the display properties visible of current sighting target, and arranges the display properties of a sighting target
Visible is not visible false, it is achieved visual sighting target at the uniform velocity moving process from left to right or from right to left.Pass through
This logic (the sighting target movieclip generated at a high speed is few, and low speed is many), this addresses the problem the phenomenon of high speed sighting target shake.
But, when low speed, owing to the sighting target generated is too much, cause there is conditions of streaking, through overtesting, use low speed to control parameter
Control effective sighting target quantity (i.e. sighting target sequence number to low speed control parameter rem, remainder be the sighting target of zero be effective sighting target),
Thus control conditions of streaking.This low speed controls being arranged so that of parameter and works as owing to sighting target movement speed v is reduced to make projection screen
On time conditions of streaking occurs, each sighting target is ranked up in order, low speed is set and controls parameter x, the most each sighting target sequence
Number control parameter x divided by described low speed, it is impossible to the sighting target divided exactly is set to invalid sighting target, deletes, existing to eliminate hangover
As, it is the natural number more than 1 that described low speed controls parameter x.
Can be adjusted reaching optimum display effect to low speed parameter according to the performance of display device during actually used.
In test environment, when speed is less than 3 meter per second, conditions of streaking is obvious, and it is 5 that configuration low speed controls parameter, can reach relatively
Good effect.
E. sighting target contrast controls: by its transparency of the alpha property control (contrast) of the regulation projection i.e. sighting target of element.
The most single sighting target is shown: kind occur by substituting sighting target resource material control sighting target, it is achieved the single projection of sighting target,
I.e. operator needs the sighting target of projection by a keyboard entry.
G. sequence sighting target projection: by configuring " play sequence ", as VHTOOTHV controls the order that sighting target occurs, logical
Cross control and " be spaced " time interval controlling next sighting target appearance, it is achieved the sequence of sighting target is play, i.e. operator starts
After detection program, sighting target just starts in a certain order, shows the most one by one.
3, dynamic visual testing sign projection: be connected to numeral by being loaded with the above-mentioned dynamic visual testing sign generation computer with state modulator platform
Scialyscope, regulate scialyscope position so that it is projection image overall width be 1 meter thus with sighting target generate during calculating side
Method adapts；Regulation scialyscope respectively controls parts (concrete debud mode illustrates) according to each digital projector, makes projected shadow
As being clearly presented in screen and central point and experimenter's binocular horizontal parallel；Run above-mentioned dynamic visual testing sign and generate flat with state modulator
Platform, tests needs according to reality, utilizes the control strip being shown on screen to arrange sighting target parameters, carries out dynamic visual acuity
Test.
4, dynamic visual acuity testing result measured under each detection state is carried out record: design specialized charting is used for
Record check result, this form domestic demand indicate visual acuity (vision) the value sighting target size input value corresponding with each vision value and
The sighting target presenting sequence corresponding with each vision value, needs to be provided with for recording experimenter's ordinary circumstance, detection sighting target speed water simultaneously
Put down and formula of the filling a vacancy posting field of detection sighting target contrast, thus improve as far as possible while simplifying detection process and operate and result
The standardization level of record.
To show sighting target by Flash program, carry out being set to inside program by Actionscript 2.0 programming language
Example, it is achieved the programming code of above-mentioned 2nd step exhibition policy is as follows:
To show sighting target above by Flash program, carry out setting inside program by Actionscript 2.0 programming language
Set up vertical dynamic visual testing sign generate and as a example by state modulator platform, illustrate that one disclosed in this invention can be in clinical ophthalmology diagnosis and treatment
During implement the occupation mode of device that dynamic visual acuity checks.
1. detection site surrounding is set.
(1) detecting distance: between experimenter and sighting target projection projection screen, vertical dimension is 4 meters.
(2) projection screen specification and position: white diffuse-reflectance screen, width >=1 meter, is arranged at and is subject to by highly >=1 meter
Examination person's dead ahead.
2. equipment connects.
Connect computer and digital projector.
3. debugging digital projector.
Regulating scialyscope position after opening digital projector makes the image width presented on screen be 1 meter, and regulation scialyscope is each
Control parts (concrete debud mode illustrates according to each digital projector), make projected image definition be presented in screen and center
Point and experimenter's binocular horizontal parallel；
4., in computer operation interface, double-click with right mouse button and represent the icon of this platform to run this platform.
5. enter detection interface.
Right mouse button clicks maximization button, makes projection surface maximize, and as shown in Figure 4, now the width of test screen is
1 meter.
6. utilize control strip to select detection pattern to proceed by dynamic visual acuity detection.
Control strip is as it is shown in figure 5, include detection model selection and sighting target size, speed, transparency (i.e. contrast) control
Data input frame, each input frame effect is as follows:
1.: sighting target movement velocity input frame, the sighting target horizontal movement represented with linear velocity (meter per second, m/s) for input
Speed values；
2.: sighting target transparency i.e. contrast input frame, for inputting the transparency i.e. contrast numerical value (example: draft of sighting target
The contrast of output sighting target is 75%, then need to input " 75 " in this input frame).
3.: timer, display dynamic visual acuity detection duration, it is used for recording experimenter and recognizes that a certain speed level regards
Time (millisecond, ms) used by mark.
4.: sighting target size input frame, it is shown in the sighting target height number of projection screen for input, thus sets and shown
The visual acuity that sighting target is corresponding, each visual acuity is all corresponding with specific sighting target height number, and concrete corresponding relation is shown in Fig. 6.
5.: low speed controls parameter input frame, for setting the hiding degree of projection sighting target, thus produce when avoiding sighting target to move
Raw jitter phenomenon.
6.: enter static button, static sighting target display mode can be entered after pressing.
7.: start button, dynamic visual testing sign projection can be started after pressing.
8.: reset button, the original timing result of rear timer is pressed by automatic clear.
Dynamic visual testing sign projection parameter setting method:
The input value unit of a: sighting target speed be " meter per second (m/s) " (sighting target motion angular velocity, need in conjunction with experimenter with
Distance between projection screen obtains after calculating).
B: the input value of sighting target size represents sighting target when with projection on experimenter's dead ahead 4 meter Chu, the screen of wide 1 meter
Actual height, its unit is centimetre (cm), regarding corresponding to each visual acuity (fractional representation and LogMAR representation)
Absolute altitude degree input value dynamic visual testing sign in accompanying drawing inputs shown in abridged table.
It is positive integer (example: 1,2,3,4,5) that c: low speed controls the input value of parameter, and its value needs to put arranging sighting target
Determining after being adjusted according to project effect after reflecting speed, concrete grammar sees above explanation.
The contrast of sighting target i.e. shown by d: transparency, needs to set according to test, example: the contrast drafting output sighting target is
75%, then need to input " 75 " in this input frame, if not inputting any numerical value, then this test program is put according to default value
Reflect 100% contrast sighting target (the ater sighting target under white background).
E. start dynamic visual acuity to test:
Method as described above, sequentially inputs sighting target speed and sighting target size, inputs " 5 " in low speed controls parameter input frame
(the suggestion hidden value under general speed), clicks START button in control strip with right mouse button, enters dynamic visual testing sign and puts
Reflect holding state.
Note: when carrying out dynamic visual acuity detection, it is necessary to the dynamic visual testing sign parameter of input includes the movement velocity of sighting target, sighting target size
And low speed controls parameter, transparency is that parameter is filled out in choosing.
F. show dynamic visual testing sign: after entering dynamic visual testing sign projection holding state, will appear from control strip indicating entry into keyboard prison
Listening status indicator, in this condition, letter consistent with needing projection sighting target by a keyboard entry can be shown this letter and regard
Mark (H, O, T, V), sighting target presenting sequence corresponding to each level of visual acuity is shown in dynamic visual testing sign input abridged table in Fig. 6.
G. change controls parameter: as changed one or more control parameters (speed, sighting target size, transparency and low speed control
Parameter processed), need to click with right mouse button and control strip " stop " inputting in corresponding input frame after button stops sighting target projection
Target value, after change with right mouse button click START button in control strip reenter dynamic visual testing sign projection treat
Machine state also starts test.
7. result is read to sentence and record:
A., based on static eyesight testing gained visual acuity result, consult dynamic visual testing sign input abridged table in accompanying drawing, this is regarded
Sighting target size input sighting target size input frame corresponding to sensitivity, as the initial visual acuity of dynamic visual acuity detection, according to inspection
Survey needs to set sighting target speed.
B. click START button in control strip with right mouse button, enter dynamic visual testing sign projection holding state.
C. consulting dynamic visual testing sign input abridged table in Fig. 6, the sighting target order corresponding according to visual acuity set with step a depends on
Secondary press in computer keyboard corresponding letter key to show this letter sighting target, please be tested after each letter sighting target reflection 3 times
Person recognizes (say letter names or describe letter shapes with gesture), 4 letters of correct identification and above i.e. think reach
To the visual acuity representated by this row sighting target and start to show its next line sighting target (example: can all recognize and regard with fractional representation
Sensitivity be 0.5 that a line sighting target → right mouse button click in control strip " stopping " button → with reference to the accompanying drawings in dynamic vision
Mark input abridged table arranges sighting target size → right mouse button and clicks START button → projection in control strip and regard with fractional representation
Sensitivity is that a line sighting target of 0.63).
If being only capable of recognizing 3 in initial visual acuity sighting target or following, i.e. show its lastrow sighting target (example: be only capable of identification
Take fractional representation visual acuity as " stopping " of clicking in control strip of 2 → right mouse button in that a line sighting target of 0.5
In button → with reference to the accompanying drawings, dynamic visual testing sign input abridged table arranges sighting target size → right mouse button and clicks and " start " in control strip to press
Button → projection is with that a line sighting target that fractional representation visual acuity is 0.4).
D. the visual acuity corresponding to minimum a line sighting target that record experimenter can recognize is the dynamic visual acuity of experimenter；
If experimenter can not recognize with fractional representation visual acuity be 0.1 that a line sighting target in 4 or more than, then be designated as not
Dynamic visual acuity inspection can be coordinated.
Result is recorded in specific record form example, as shown in Figure 7.
The dynamic visual acuity detection method that the present invention provides, can produce dynamic visual testing sign by the method that electronic computer programs,
By arrange inside program realize sighting target in the horizontal direction at the uniform velocity, easy motion, velocity interval cover relatively wide (10 °/
Second-150 °s/sec)；Arrange contain sighting target speed, sighting target size, sighting target contrast arrange the control strip of dialog box and by it
It is presented in computer interface, personal settings can be carried out by computer keyboard parameter each to sighting target by this dialog box, thus
Simplify operating process；Design specialized result charting makes operation and result recording method standardization；Projection projection system is
Digital projector, screen is the diffuse-reflectance flat screen of wide 1 meter high 1 meter, and equipment is simple, save space, and method of testing is just
In operation, it is applicable in clinical ophthalmology diagnosis and treatment process the people that dynamic visual acuity is had higher requirements by driver, athlete etc.
Group carries out dynamic visual acuity detection in large-scale, high-efficiency.
Above-described detailed description of the invention, has been carried out the purpose of the present invention, technical scheme and beneficial effect the most in detail
Illustrate, be it should be understood that the detailed description of the invention that the foregoing is only the present invention, the protection being not intended to limit the present invention
Scope, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, should be included in
Within protection scope of the present invention.
Claims (6)
1. a dynamic visual acuity detection method, it is characterised in that the method includes:
Generate instruction according to sighting target and generate the sighting target for dynamic visual acuity detection；
The size of described sighting target, moving direction, translational speed, contrast and synchrotimer is set according to parameter；
Described sighting target is exported display device, and realizes horizontal direction and move, make and there is horizontal movement speed and be easy to
The dynamic visual testing sign observed；
Receive testing result information, and store after testing result Information Statistics and export；
Wherein, by regulating the alpha property control sighting target contrast of sighting target；
Described sighting target is exported display device, and realizes horizontal direction and move and include,
First sighting target display frequency f, the number of display sighting target the most per second are set, then move divided by sighting target with sighting target display frequency f
Speed v, obtains sighting target number n needing to arrange, then is equidistantly positioned in program window by this n sighting target, and by this n
The display properties of sighting target is set to not visible；Finally create thread, be visual by arranging the display properties of current sighting target, and arrange
The display properties of a upper sighting target is not visible, it is achieved visual sighting target at the uniform velocity moving process from left to right or from right to left；
When due to sighting target movement speed v be reduced to make on projection screen, there is conditions of streaking in sighting target time, each sighting target is carried out in order
Sequence, arranges low speed and controls parameter x, and the most each sighting target sequence number controls parameter x divided by described low speed, it is impossible to the sighting target divided exactly sets
Being set to invalid sighting target, delete, to eliminate conditions of streaking, it is the natural number more than 1 that described low speed controls parameter x；Low speed control
The basic skills that parameter processed is arranged on the premise of state modulator open port is set by arrange after field adjustable applicable selected by put
The low speed reflecting speed controls parameter.
2. a kind of dynamic visual acuity detection method as claimed in claim 1, it is characterised in that:
Described sighting target is the English alphabet sighting target for examination of visual acuity, and by computer graphics and image procossing be resolution at least
The picture of 300dpi.
3. a kind of dynamic visual acuity detection method as claimed in claim 2, it is characterised in that:
The English alphabet of described sighting target is " H " " O " " T " " V ".
4. a kind of dynamic visual acuity detection method as claimed in claim 1, it is characterised in that:
The size setting described sighting target according to parameter includes the height that sets described sighting target, its set formula as:
Sighting target height=program window height × sighting target actual height/actual displayed visual field height；
Wherein, program window height is after program is opened, and the default height of the window shown over the display, with pixel as list
Position；Sighting target actual height is the sighting target pre-set actual height on the projection screen, and unit is centimetre；The actual displayed visual field is high
Degree is the actual height that program window is incident upon on projection screen, and unit is centimetre.
5. a kind of dynamic visual acuity detection method as claimed in claim 1, it is characterised in that:
Set according to parameter described sighting target translational speed formula as:
Sighting target translational speed=program window width/sighting target display time；
Wherein, program window width is after program is opened, and the acquiescence width of the window shown over the display, with pixel as list
Position；The sighting target display time is the developed width that is incident upon on projection screen of program window divided by sighting target actual mobile speed on the projection screen
Degree, unit is the second.
6. a kind of dynamic visual acuity detection method as claimed in claim 1, it is characterised in that:
Described testing result information is stored and exports the step in, design specialized charting for record check tie
Really, this form domestic demand indicates the vision value sighting target size input value corresponding with each vision value and the sighting target corresponding with each vision value projection
Sequentially, need to be provided with simultaneously and fill a vacancy formula posting field for recording experimenter's ordinary circumstance, detection sighting target speed level and detection sighting target pair
Degree of ratio.
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Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105231986A (en) * | 2015-11-16 | 2016-01-13 | 中国人民解放军海军总医院 | Dynamic visual acuity testing system and method |
| CN105231988A (en) * | 2015-11-16 | 2016-01-13 | 中国人民解放军海军总医院 | Method for regulating sighting mark moving speed in dynamic visual acuity testing system |
| CN106333642B (en) * | 2016-09-27 | 2018-08-24 | 深圳市亮睛视觉研究所 | A kind of dynamic visual acuity tester and its test method |
| CN106821297B (en) * | 2016-12-31 | 2018-05-29 | 安徽三联交通应用技术股份有限公司 | A kind of portable dynamic vision testing method that equipment is shown based on head |
| JP6963390B2 (en) * | 2017-02-10 | 2021-11-10 | マクセル株式会社 | Dynamic visual acuity measuring device and dynamic visual acuity measuring method |
| CN107320064A (en) * | 2017-07-03 | 2017-11-07 | 中国人民解放军海军总医院 | A kind of dynamic visual acuity method of testing with hand eye coordination reaction time compensation function |
| CN108113638A (en) * | 2018-02-05 | 2018-06-05 | 中国人民解放军空军航空医学研究所 | A kind of dynamic visual acuity detection method |
| TWI658811B (en) * | 2018-06-15 | 2019-05-11 | 長庚大學 | Visual state detection method |
| CN109124560A (en) * | 2018-06-27 | 2019-01-04 | 林子申 | A kind of visual performance assessment method and its system |
| CN110123595B (en) * | 2019-05-13 | 2021-08-10 | 广州视景医疗软件有限公司 | Method and system for checking visual signal-to-noise ratio in visual function training |
| CN112842248B (en) * | 2020-12-31 | 2021-11-09 | 北京大学第三医院（北京大学第三临床医学院） | Dynamic contrast sensitivity test system and test method thereof |
| CN112786164B (en) * | 2021-01-27 | 2023-05-30 | 上海交通大学医学院附属第九人民医院 | Dynamic picture design method, device, equipment and medium for adjusting optotype |
| CN113516683B (en) * | 2021-04-12 | 2023-10-10 | 广东视明科技发展有限公司 | Modeling method for evaluating influence of moving speed on stereoscopic vision |
| CN113288044B (en) * | 2021-05-27 | 2022-01-07 | 北京大学第三医院（北京大学第三临床医学院） | Dynamic vision testing system and method |
| CN116725472B (en) * | 2023-08-14 | 2024-04-12 | 北京大学第三医院（北京大学第三临床医学院） | Color dynamic vision testing system and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101266693A (en) * | 2008-03-31 | 2008-09-17 | 康佳集团股份有限公司 | A method for dynamic control of animation operation process |
| CN101351150A (en) * | 2005-11-15 | 2009-01-21 | 卡尔蔡司视觉澳大利亚控股有限公司 | Vision testing system and method |
| CN102548464A (en) * | 2009-08-03 | 2012-07-04 | 耐克国际有限公司 | Vision testing and/or training using adaptable visual indicia |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7350921B2 (en) * | 2003-06-23 | 2008-04-01 | Phillip V. Ridings | iQueVision: animated / vision testing system |
| US8757805B2 (en) * | 2009-08-17 | 2014-06-24 | Allan N. Hytowitz | Animated image vision test |
-
2015
- 2015-05-26 CN CN201510275533.5A patent/CN104825127B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101351150A (en) * | 2005-11-15 | 2009-01-21 | 卡尔蔡司视觉澳大利亚控股有限公司 | Vision testing system and method |
| CN101266693A (en) * | 2008-03-31 | 2008-09-17 | 康佳集团股份有限公司 | A method for dynamic control of animation operation process |
| CN102548464A (en) * | 2009-08-03 | 2012-07-04 | 耐克国际有限公司 | Vision testing and/or training using adaptable visual indicia |
Non-Patent Citations (1)
| Title |
|---|
| 《儿童视力表》研制报告;黄燕、王朝青、吴淑英;《海南医学》;20011231;全文 * |
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