CN205866721U - Full -automatic visual acuity test device of infant - Google Patents
Full -automatic visual acuity test device of infant Download PDFInfo
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- CN205866721U CN205866721U CN201620466488.1U CN201620466488U CN205866721U CN 205866721 U CN205866721 U CN 205866721U CN 201620466488 U CN201620466488 U CN 201620466488U CN 205866721 U CN205866721 U CN 205866721U
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Abstract
The utility model provides a full automatic infant visual acuity test device, but automatic display upsets figure, automatic recording and calculates the infant position that eyes are seen, direction and time to but autoanalysis obtains the test result, full -automatic visual acuity test device of infant includes: module, control module, display module and visual acuity test appearance host computer are tracked to the eyeball, the eyeball is tracked module, display module and is linked to each other with visual acuity test appearance host computer respectively, the eyeball is tracked the module and is used for fixing a position the people position that the eye is seen, the display module is used for the demonstration inspection to use the pattern, control module realizes the data communication between visual acuity test appearance host computer, display module and the eyeball pursuit module.
Description
Technical field
This utility model relates to a kind of equipment for examining vision, the device of the full-automatic examination of visual acuity of a kind of infant.
Background technology
Vision i.e. Snazzi degree, the main visual function reflecting macular area.Examination of visual acuity is for the early discovery of ophthalmic diseases, early
Phase treatment has very important meaning.The growth course of human vision is: the 4th week (1) period of pregnancy, and fetus vision is formed；(2) new
Raw youngster: vision of being born in 1 week is 0.01～0.02, and big baby's vision was 0.05～0.1 in one month, birth to 3 months it
Between, eyeball can't fixation, and can be attracted by face, bright or motion object；(3) 3 months: the vision of most of childs
Can " following " moves very smoothly object, also sight line can be fixed on object.Color, the object of motion can attract children
Youngster；(4) 3～6 months: retina is the most well grown, child can be remote by closely seeing then near by far seeing, the trickle position of object
Also can see；(5) 6 months: the 2/3 of the existing adult of eyes is big, sees that object is that eyes are seen simultaneously, thus obtains normal
" stereopsis vision "；(6) 1 years old: vision general 0.1～0.3；(7) twenty-twenty visions of 3 years old are about 0.6～0.8；(8) 4 years old normal
When vision is about 0.8～1.0.3 years old；(9) 5～7 years old: if twenty-twenty vision is 1.0. is unable to reach twenty-twenty vision, then need to find former
Cause, if being found to have amblyopia, by positive treatment, the result that still can obtain；(10) 8～9 years old: visual acuity is the completeest
Becoming, if being the most just found to have amblyopia or not having stereoscopic vision, then the chance corrected is the most pessimistic.
But for young infant, the infant within especially 3 years old, due to by age, intelligence, understanding energy
The impact of the many factors such as power, ability to express, mental status and environmental condition, the inspection of vision is extremely difficult.According to baby
The developmental state of child, existing have for infant eyesight inspection method: (1) eye and the pursuit movement (neonate) of head: see
Examine baby's fixation and follow the ability of target；(2) reflection (3 months) is detested: judge that big monthly age infant is with or without amblyopia or eyes
Difference regards；(3) optokinetic nystagmus (OKN, 6 months): will the rotating examination of black-white grating striped of different width
Drum, repeat before infant forward and backwards rotation, produce OKN, gradually bulging for test bar grid narrowed, until tested baby
Fillet grid before not producing OKN are the vision of baby；(4) selectivity viewing inspection technique (1 years old): i.e. utilize baby to black
The principle that white striated pattern is interested than uniform grey figure, two kinds of figures of display are watched by infant simultaneously, change striped
Width is till baby is reluctant to continue to observe, and the width of striped represents the PL vision of baby；(5) test chart for children inspection technique (2
～3 years old): the figure using child to be familiar with and like, design by visual angle size；(6) visual evoked potential inspection technique, i.e. exists
Baby head sticks electrode, repeats upset with grid or bar gate figure and allows infant watch, by the superposed average of up to a hundred times
After obtain the visual evoked potential waveform of brain wave.
But above method there is the problem that method (1)～(5) are required for special trained medical worker and enter
Row manual operation, and the success or not checked needs the cooperation of testee, and with the less effective of child, it checks that result is high
Degree relies on skill and the experience of examiner, needs eye motion direction and the position of subjective judgment infant, and operation is complicated, required
Time is long, and can not get accurate result；The shortcoming of method (6) is that test instrunment patch electrode needs and baby carries out skin and connects
Touching, patch electrode and secondary repetitive stimulation up to a hundred are also the longest, are difficult to promote clinically.
And infantile period is the critical period that vision is ripe, also it is to produce the period that developmental character visual problem is most sensitive, as
Fruit is provided that the method or apparatus of a kind of complete-automatic check infant eyesight, can be used for the vision of clinical measures baby, this for
Examination of visual acuity and treatment field also have great significance.
Utility model content
Technical problem to be solved in the utility model is to provide one and can actual in clinic apply, it is simple to operation
Full automatic infant visual acuity tester, can be with the inadequate experimenter's vision of complete-automatic check infant or cognitive competence
Method, vision is ripe early stage or the critical period weighs its visual acuity situation.
This utility model provides a kind of full-automatic equipment for examining vision of infant, can automatically show stimulation figure, automatically
Record and calculate the seen position of infant eyes, direction and time, and can automatically analyze and obtain test result, and need not and baby
There is Body contact in child, efficiently solve that at present tradition infant eyesight inspection method exists waste time and energy and result not
Enough accurate problems.
The composition structure of the full-automatic equipment for examining vision of infant described in the utility model is: by eyeball tracking module
(100), control module (200), display module (300) and vision tester main frame (400) composition；Described eyeball tracking module,
Display module is connected with vision tester main frame respectively；Described eyeball tracking module is used for positioning the seen position of human eye；Described aobvious
Show that module is for showing inspection pattern；Described control module realizes vision tester main frame, display module and eyeball tracking mould
Data communication between block.
Described eyeball tracking module includes thermal camera (102), signal processing unit (103) and infrared spotlight
(101), described quantity of light source is at least one, and described thermal camera is continuously shot the image comprising experimenter's eye, and will
Image information passes to control module.
The image of described eyeball tracking module collection is identified by described control module automatically, extracts eyes image, and
Mutual alignment relation according to pupil center and the center of corneal reflection judges that the position in the display module of eye gaze is sat
Mark, and the position coordinates described eyeball tracking module captured is compared with the position coordinates on described display module, according to
Inspection result is sent to described vision tester main frame by coordinate comparing result.
The inspection method that the full-automatic equipment for examining vision of infant that this utility model relates to is used be:
(1) showing test pattern in display module, experimenter the most just watches these patterns；
(2) eyeball tracking module is continuously shot the image comprising experimenter's eye, and passes to image information control mould
Block；
(3) control module image automatic identification to photographing, according to pupil center and the phase at the center of corneal reflection
Position relationship records and calculates position, direction and the time that subject eye is seen automatically mutually；
(4) the seen position of eyes automatically identified by image procossing is carried out with the picture position of actual displayed in display module
Comparison, it is judged that the position seen is the most correct；
(5) to same pattern, repeatedly, image occurs at random for repeated execution of steps (1)～(4)；
(6) add up the accuracy of the seen position of eyes under this image, compare with the threshold value of the accuracy set, work as institute
When stating the accuracy of image less than threshold value, turn down image difficulty, and continue executing with step (1)～(5), until this pattern is correct
Rate reaches to set threshold value, now determines the vision of this experimenter；When the accuracy of image described under described pattern is greater than or equal to
During threshold value, then improve image difficulty, and continue executing with step (1)～(5), until determining what the vision of this experimenter can reach
Till peak；
(7) vision of experimenter is determined according to the result in step (6).
In above-mentioned steps (3), the mutual alignment relation according to pupil center and the center of corneal reflection judges that eyes are seen
Position, concrete grammar is:
A) one is arranged higher than the average gray of pupil less than surrounding iris, the gray scale threshold of the average gray of skin area
Value, is possible eye areas less than the zone marker of described gray threshold；
B) area threshold of one interference excluding hair and the black object such as eyebrow, eyelash is set, thus extracts
To the region at eye pupil place, if monocular vision test then obtains single oculopupillary image, if binocular vision is surveyed
Examination then obtains the image of pupil of both eyes；
C) experimenter at least watch display module right figure midpoint, display module central authorities, on the left of display module in figure
Point, the pupil of record diverse location and the image of pupil neighboring area；
D) utilize feature extraction that pupil region is lower than peripheral region gray value to the edge of pupil region, and calculate
Its center A；
E) utilize feature extraction that cornea retroreflective regions is substantially high than peripheral region gray value to the limit of N number of corneal reflection
Edge, and calculate center B1 to the BN of each corneal reflection respectively, the quantity of corneal reflection N is whole more than or equal to one
Number；
F) the center C of the formed figure of line of B1 to BN is calculated, when eyes remove to see the diverse location of display module
Time, the center C's of the position A of pupil center and center the formed figure of B1 to BN line of each corneal reflection
Position relatively changes；
G) using C point as coordinate origin, in units of pixel, pupil center's point A in each image is calculated respectively relative
In the coordinate of C, seen for eyes position is set up corresponding with the pupil cornea relative coordinate of eyes imaging in near-infrared video camera
Relation.
The technical scheme that thered is provided by above-mentioned this utility model is it can be seen that this utility model is a kind of infant automatically regards
Power checks device, can automatically show stimulating image, automatically record and calculate the seen position of infant eyes, direction and time, and
Can automatically analyze and obtain test result, need not with infant generation Body contact in the case of with image attracting babies master
In-motion viewing is seen, efficiently solve that at present tradition infant eyesight inspection method exists waste time and energy and result is asked the most accurately
Topic, uses objective data to obtain comprehensive assay, improves the accuracy rate of inspection, and provided by the utility model
The full-automatic equipment for examining vision of infant can use through simple training, less demanding to operator.
Infant provided by the utility model full-automatic equipment for examining vision not only be typically used in infant
Examination of visual acuity, and can also be used for other people, such as mentally handicapped businessman group or the examination of visual acuity of deaf mute.
Accompanying drawing explanation
By reading the detailed description of hereafter preferred implementation, various other advantage and benefit common for this area
Technical staff will be clear from understanding.Accompanying drawing is only used for illustrating the purpose of preferred implementation, and is not considered as this practicality
Novel restriction.And in whole accompanying drawing, it is denoted by the same reference numerals identical parts.In the accompanying drawings:
The structural representation of the full-automatic equipment for examining vision of Fig. 1 infant.
The group selection viewing figure that Fig. 2 display module shows, side is black and white strip grid map, and opposite side is uniform ash
Degree figure.
Pupil during Fig. 3 display module right figure midpoint and the image of pupil neighboring area.
Pupil during Fig. 4 display module central graphical midpoint and the image of pupil neighboring area.
Pupil during figure midpoint and the image of pupil neighboring area on the left of Fig. 5 display module.
The relative position view at pupil center and corneal reflection center during Fig. 6-1 display module right graphic.
The relative position view at pupil center and corneal reflection center during Fig. 6-2 display module intermediate pattern.
The relative position view at pupil center and corneal reflection center during Fig. 6-3 display module left panels.
Detailed description of the invention
It is more fully described the illustrative embodiments of the disclosure below with reference to accompanying drawings.Although accompanying drawing shows these public affairs
The illustrative embodiments opened, it being understood, however, that may be realized in various forms the disclosure and the reality that should not illustrated here
The mode of executing is limited.On the contrary, it is provided that these embodiments are able to be best understood from the disclosure, and can be by these public affairs
What the scope opened was complete conveys to those skilled in the art.
The composition structure of the full-automatic equipment for examining vision of infant described in the utility model is: by eyeball tracking module
(100), control module (200), display module (300) and vision tester main frame (400) composition；Described eyeball tracking module
(100), display module (200) is connected with vision tester main frame (400) respectively；Described eyeball tracking module (100) is for fixed
The seen position of human eye, position；Described display module (200) is used for showing inspection pattern；Described control module (200) realizes vision
Data communication between somascope main frame (400), display module (300) and eyeball tracking module (100).
Described eyeball tracking module includes thermal camera (102), signal processing unit (103) and infrared spotlight
(101), described infrared spotlight be two wavelength be the near-infrared LED light source of 850nm, described thermal camera is continuously shot bag
Containing the image of experimenter's eye, and image information is passed to control module.
The image of described eyeball tracking module collection is identified by described control module automatically, extracts eyes image, and
Mutual alignment relation according to pupil center and the center of corneal reflection judges that the position in the display module of eye gaze is sat
Mark, and the position coordinates described eyeball tracking module captured is compared with the position coordinates on described display module, according to
Inspection result is sent to described vision tester main frame by coordinate comparing result.
The use step of the full-automatic equipment for examining vision of infant involved by this utility model:
(1) computer shows a group selection viewing graphic pattern such as accompanying drawing 2 over the display, and the side of figure is black and white strip grid
Trrellis diagram, opposite side is inhomogeneous intensity figure, and infant can be differentiated the fringe density of grid map and reflect its vision.Grid map and gray scale
The relative position of figure occurs at random.Infant is allowed the most just to watch these patterns.
(2) being positioned at the near-infrared photographic head below display, two lateral extent 15 centimeters respectively place the reddest of a 850nm
Outer LED light source.While display examination of visual acuity figure, video camera is continuously shot the image comprising infant eye, and will figure
As being acquired by computer by data wire.
(3) image that photographic head is photographed by computer identifies automatically, extracts the image of eyes, and according to pupil
The mutual alignment relation at the center of center, hole and corneal reflection judges that the position that eyes are seen, detailed process are:
A) when 850nm near infrared light imaging, pupil gray value is significantly low than surrounding iris, skin area, arranges one
Gray scale judgment threshold, this gray threshold is higher than the average gray of pupil and is less than the average ash of surrounding iris, skin area
Degree.It is possible eye areas less than the zone marker of this gray threshold.
B) one area threshold is set and excludes hair and the interference of the black object such as eyebrow, eyelash, thus extract
The region at eye pupil place.If monocular vision test obtains single oculopupillary image, if binocular vision is tested
Image to pupil of both eyes.
C) as a example by simple eye left vision is tested, accompanying drawing 3～5 is that eyes see display right figure midpoint, display respectively
Pupil during figure midpoint and the image of pupil neighboring area on the left of device central authorities, display.
D) utilize feature extraction that pupil region is lower than peripheral region gray value to the edge of pupil region, and calculate
Its center A.
E) utilize the feature extraction that cornea retroreflective regions is substantially high than peripheral region gray value to two corneal reflection
Edge, and calculate its center B1 and B2 respectively.
F) the line point midway C of B1 and B2 is calculated.Cornea eye surface is a sphere, and when eyes move, cornea is anti-
The translational speed of luminous point is slower than the translational speed of pupil center.Therefore when eyes remove the diverse location seeing on display screen, pupil
The position A at center will change with the relative position of the midpoint C of corneal reflection line.
G) using C point as coordinate origin, it is designated as (0,0), in units of pixel, respectively in calculating each image in pupil
The heart point A coordinate relative to C.As a example by accompanying drawing 6, if see screen midpoint (as shown in accompanying drawing 6-2), pupil center A point is relative to C
The coordinate of point is (X0, Y0), then when seeing the screen left side (as shown in accompanying drawing 6-3), the X-coordinate of A point can be more than X0；Seeing screen
Time on the right of Mu (as shown in accompanying drawing 6-1), the X-coordinate of A point can be less than X0；When seeing above screen, the Y coordinate of A point can be more than Y0,
When seeing below screen, the Y coordinate of A point can be less than Y0.According to this rule, can be by seen for eyes position and eyes at near-infrared
The pupil cornea relative coordinate of imaging in video camera sets up corresponding relation.
(4) graph position of the seen position of eyes automatically identified by image procossing and computer actual displayed compares
Right, it is judged that the position seen is the most correct.
(5) same cell densities pattern is repeatedly tested, and grid graph right position occurs at random, and opposite side is gray scale
Figure.
(6) accuracy of this seen position of cell densities figure eyes is added up, as reached certain accuracy threshold value, such as
More than 70%, then it is assumed that this cell densities normal visual acuity.Next round can random display more high density grid graph, corresponding higher
Vision.As do not reached accuracy threshold value, then it is assumed that this cell densities vision is abnormal, can random display less dense grid map
Shape, corresponding lower vision.
(7) the high density grid can correctly distinguished according to infant, then it is assumed that be the vision value of this infant.
The above, only this utility model preferably detailed description of the invention, but protection domain of the present utility model is not
Being confined to this, any those familiar with the art, in the technical scope that this utility model discloses, can readily occur in
Change or replacement, all should contain within protection domain of the present utility model.Therefore, protection domain of the present utility model should be with
Described scope of the claims is as the criterion.
Claims (2)
1. the full-automatic equipment for examining vision of infant, it is characterised in that: described infant full-automatic equipment for examining vision bag
Include: eyeball tracking module, control module, display module and vision tester main frame；Described eyeball tracking module, display module divide
It is not connected with vision tester main frame；Described eyeball tracking module is used for positioning the seen position of human eye；Described display module is used for
Display inspection pattern；Described control module realizes the number between vision tester main frame, display module and eyeball tracking module
According to communication.
2. the full-automatic equipment for examining vision of infant as claimed in claim 1, it is characterised in that: described eyeball tracking module bag
Including thermal camera, signal processing unit and infrared spotlight, described quantity of light source is at least one.
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| CN201620466488.1U CN205866721U (en) | 2016-05-20 | 2016-05-20 | Full -automatic visual acuity test device of infant |
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| CN201620466488.1U CN205866721U (en) | 2016-05-20 | 2016-05-20 | Full -automatic visual acuity test device of infant |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106037627A (en) * | 2016-05-20 | 2016-10-26 | 上海青研科技有限公司 | Full-automatic visual acuity examination method and device for infants |
| CN107929007A (en) * | 2017-11-23 | 2018-04-20 | 北京萤视科技有限公司 | A kind of notice and visual capacity training system and method that tracking and intelligent evaluation technology are moved using eye |
| CN110547760A (en) * | 2019-08-09 | 2019-12-10 | 西安交通大学 | infant amblyopia electroencephalogram objective detector |
-
2016
- 2016-05-20 CN CN201620466488.1U patent/CN205866721U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106037627A (en) * | 2016-05-20 | 2016-10-26 | 上海青研科技有限公司 | Full-automatic visual acuity examination method and device for infants |
| CN107929007A (en) * | 2017-11-23 | 2018-04-20 | 北京萤视科技有限公司 | A kind of notice and visual capacity training system and method that tracking and intelligent evaluation technology are moved using eye |
| CN110547760A (en) * | 2019-08-09 | 2019-12-10 | 西安交通大学 | infant amblyopia electroencephalogram objective detector |
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