CN201481388U - Electronic perimeter with eyeball tracking and refractive compensation functions - Google Patents
Electronic perimeter with eyeball tracking and refractive compensation functions Download PDFInfo
- Publication number
- CN201481388U CN201481388U CN2009201621761U CN200920162176U CN201481388U CN 201481388 U CN201481388 U CN 201481388U CN 2009201621761 U CN2009201621761 U CN 2009201621761U CN 200920162176 U CN200920162176 U CN 200920162176U CN 201481388 U CN201481388 U CN 201481388U
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- diopsimeter
- refractive errors
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Abstract
The utility model relates to an electronic perimeter with eyeball tracking and refractive compensation functions. The electronic perimeter comprises a casing and a plane electronic visual field screen, wherein a cylindrical peeping channel is arranged on the casing, the lateral surface of the column body of the peeping channel is provided with an infrared lighting lamp for the eyeball of a tester to send out infrared light, the inside of the peeping channel is connected with a dioptric correction system, thereby closing the inside of the casing, a dioptric correction lens is arranged on the dioptric correction system, and an infrared camera for shooting infrared light reflected by eyeballs of a tester is further arranged in the casing. The electronic perimeter has the advantages that the casing can be closed, and the electronic perimeter can conduct eyeball tracking and refractive compensation.
Description
Technical field
This utility model belongs to medical instruments field, relates to a kind of ophthalmology perimetry devices, and it has eye tracking and refraction compensation function.
Background technology
Perimetry is the most basic inspection of ophthalmology, is the main foundation of glaucoma and optic neuropathy early diagnosis.The 1980's, manual arc perimeter and campimeter were replaced by the auxiliary automatic perimeter of computer along with the application of computer technology in medical science.The perimeter of these automatizatioies is no longer dependent on visual field technician's skill, operates fairly simplely, but still relies on patient's subjectivity fully.
Present international perimeter mainly contains the product of Humphrey and Octopus company, and they all are to grow up on the Goldmann static perimeter basis.Domestic similar perimeter product just simply imitates external product usually.These visuals field are in respect of following characteristics and deficiency:
1, spherical visual field screen: spherical visual field screen great advantage is to measure peripheral visual field in less spatial dimension, but its shortcoming is than higher to the eyeball position requirement, require eyeball position (strictness say so eyeball central fovea of macula) to be on the centre of sphere of this spherical visual field screen, and this point is difficult to accomplish to most of examinates.Studies show that in addition the perimetry of central authorities' 30 degree is enough to early diagnosis glaucoma and some optic neuropathy.Peripheral visual field changes the shortage specificity.
2, the sighting target of detection is fixed: existing perimeter sighting target is pre-designed, is fixed on the definite position of spherical visual field screen, and relation is separate between it and the eyeball position.In order to reduce error, these perimeters are to monitor that by periodically measuring blind spot or pupil infrared reflecting person under inspection's eyeball watches situation attentively, and come assessment reliability with false positive and false negative.This method can only be controlled at reliability certain scope, and is accurate inadequately.And if these perimeters person under inspection in checking process cooperates badly, audit program is in time to correct cooperate degree, and the review time is long.As the Humphrey perimeter, whole procedure to finish after, could judge cooperate degree, the result of acquisition is also unreliable.Though the Octopus perimeter also has the supervision of eyeball position, a kind of passive process, after the eyeball pupil position had departed from certain scope, audit program stopped voluntarily, need the technician to readjust after, could continue again to check.
3, do not compensate ametropic function automatically, the visual field, space sensitivity is relevant with dioptric, ametropia can cause that visual field sensitivity diffusivity descends, and the check result that influences the visual field judges that present perimeter need be worn frame eyeglasses and come correction of refractive errors to correct, owing to be subjected to the frame eyeglasses size shape, the influence of factors such as periphery lens shape change, asymmetric reduced circumference that the peripheral visual field after wearing glasses is artificial or sensitivity descend, and cause the peripheral visual field puppet damaged.
4, visual field screen communicates with the external world, and its visual field screen of existing perimeter communicates with the external world, and the contrast between the brightness of the sighting target on the screen of the visual field and visual field screen is subjected to environmental effect on every side.Therefore existing perimeter inspection requirements has special inspection chamber, and this is the comparison difficulty to a basic hospital, also is not suitable for community and carries out visual field generaI investigation.This has limited perimetric extensive use.
Although in recent years along with the successful Application of eye tracking technology in the excimer laser field, with the accuracy and the reliability of raising perimetry, yet spherical visual field screen and fixed sighting target that existing perimeter is used have all determined these perimeters can not carry out the tracking of test point to eyeball position.
In order to overcome above-mentioned existing perimetric shortcoming, this utility model the people redesign perimeter, can adjust in real time according to eyeball position, also can compensate the visual field sensitivity that causes because of the ametropia factor and descend, the contrast of sighting target brightness simultaneously and visual field screen is more stable.
The utility model content
The purpose of this utility model is to provide a kind of electronic diopsimeter, its sighting target is not fixed, but can adjust in real time according to eyeball position, also can compensate the visual field sensitivity dampening factor that causes because of the ametropia factor in addition, simultaneously this perimetric visual field screen seals, and the contrast of sighting target brightness and visual field screen is more stable.
Particularly, this utility model provides a kind of electronic diopsimeter with eye tracking and refraction compensation function, it comprises housing (5), plane electronics visual field screen (1), it is characterized in that, have the cylindrical passage (51) of spying on the housing (5), the circular open of spying on passage (51) can make the experimenter watch housing (5) inside outside housing (5); Spying on passage (51) column side face is equipped with and is used for sending ultrared infrared illumination lamp (4) to experimenter's eyeball; Spy on passage (51) the inside and link to each other, thereby close housing (5) inside with correction of refractive errors system (3); Have correction of refractive errors eyeglass (31) in the correction of refractive errors system (3), make the experimenter watch the plane electronics visual field in the housing (5) to shield (1) by spying on passage (51) and seeing through correction of refractive errors eyeglass (31) successively; The thermal camera (2) that also has the infrared light that is used to take the reflection of experimenter's eyeball in the housing (5); And this electronic diopsimeter also has computing system, and described computing system is used for demonstration that control plane electronics visual field screen (1) is gone up sighting target, and is used to the visual field that receives the taken experimenter's eyeball image of thermal camera (2) and calculate the experimenter.Like this, in the space of the plane electronics visual field screen (1), thermal camera (2), the sealing of correction of refractive errors system (3) homogeneous, this space is only linked up with extraneous in the position of checking eye, when checking, blocked by the inspection eye and spy on passage (51), therefore perimetry space sealing, thus make the contrast of sighting target brightness and visual field screen more stable.
Adopt the advantage of infrared illumination to be, can not influence the pupil size, also can not produce the factor that dazzle etc. influences the perimetry result.In order to make the reflected light of infrared illumination lamp (4) irradiation cornea not reflex in the thermal camera (2), and the clear shaped position image that reflects iris makes thermal camera (2) capture eyeball iris image clearly, be beneficial to determining of gauge point on the iris (as pupil, crypts of Fuchs and/or nevus cell nevus), in this electronic diopsimeter, the preferred oblique irradiation of infrared illumination lamp (4) experimenter eyeball iris, more preferably the angle of infrared illumination lamp (4) direction of illumination and experimenter's cornea is more than 150 degree, preferred 155-170 degree is as 155 degree, 160 degree or 165 degree.
In this electronic diopsimeter, in order to make the irradiation light of infrared illumination lamp (4) more even, the preferred a plurality of infrared illumination lamps (4) that adopt, as spy on equidistantly to be equipped with on passage (51) the column side face circumference and be used for sending ultrared a plurality of infrared illumination lamps (4) to experimenter's eyeball, 8 infrared illumination lamps (4) more preferably are installed.
In this electronic diopsimeter, in order to make that the correction of refractive errors number of degrees can be adjusted to adapt to different experimenters, have a plurality of correction of refractive errors eyeglasses (31) in the preferred correction of refractive errors system (3), make the experimenter watch the plane electronics visual field in the housing (5) to shield (1) by a correction of refractive errors eyeglass (31) of spying on passage (51) and see through in these a plurality of correction of refractive errors eyeglasses (31) successively.Correction of refractive errors eyeglass (31) can be an aspherical mirror.More preferably, correction of refractive errors system (3) is a runner dish, equidistantly be distributed with a plurality of correction of refractive errors eyeglasses (31) on this runner dish, most preferably equidistantly be distributed with 12 correction of refractive errors eyeglasses (31) on this runner dish, wherein the rectification number of degrees of these 12 correction of refractive errors eyeglasses (31) be respectively+6 ,+5 ,+4 ,+3 ,+2 ,+1,0 ,-1 ,-2 ,-3 ,-4 and-5.This correction of refractive errors system (3) can make the patient comfortable by compensating the ametropia of closely operation, and the clear visual field screen of seeing reduces fatigue, can get rid of the shortcoming that causes visual field sensitivity to descend because of the ametropia factor simultaneously.In the specific embodiment, this runner dish is installed in the place apart from experimenter's eyeball 12mm, and it is a runner dish that has 12 aspherical lens, and the number of degrees of eyeglass are respectively+and 6 ,+5 ,+4 ,+3 ,+2 ,+1,0 ,-1 ,-2 ,-3 ,-4 ,-5.The eyeglass size is 12-15cm, and arrange the position of these 12 eyeglasses direction by the hour.Before checking the visual field, the experimenter adjusts eyeglass according to nearly refractive diopter, makes the experimenter can more clearly see sighting target.
In this electronic diopsimeter, it is not fixed that preferred planar electronics visual field screen (1) is gone up the sighting target that shows, but can adjust in real time according to eyeball position.The example of plane electronics visual field screen (1) has LCDs, plasma panel etc., and they all can control the sighting target that shows on it by computing system easily.More preferably plane electronics visual field screen (1) is transportable, and it can be adjusted between distance experimenter eyeball 33mm and 25mm, therefore also can further compensate refractive diopter by adjusting visual field screen distance.
In addition, thermal camera (2) can adopt the thermal camera of this area routine, as the infrared DV based on charge-coupled device (CCD), thereby can easily the eyeball image that photographs be transferred to computing system.From then on iris and limbus of corneae image that computing system is caught according to thermal camera (2) select not three gauge points (as pupil, crypts of Fuchs and/or nevus cell nevus etc.) on same straight line on the image, extrapolate the locus that test point should occur.
The beneficial effects of the utility model are that perimetric advantage of the present utility model has:
1, eyeball is little at the more spherical perimeter of influence that the skew of vertical dimension causes, and for example when eyeball position was offset backward, what in fact spherical perimeter 30 degree sighting targets were represented was a smaller angle sighting target, and the angle of campimeter representative is more near 30 degree;
2, sighting target position and on-fixed but constitute fixed relation in eyeball position have been realized combining of eye tracking technology and perimetry technology;
3, overcome the visual field sensitivity decline problem that the dioptric factor causes;
4, the sealing of perimetry space, not high to checking environmental requirement, easier popularizing.
For the ease of understanding, below will describe in detail of the present utility model by concrete drawings and Examples.It needs to be noted, instantiation and accompanying drawing only are in order to illustrate, obviously those of ordinary skill in the art can illustrate according to this paper, in scope of the present utility model this utility model is made various corrections and change, these corrections and change are also included in the scope of the present utility model.
Description of drawings
Fig. 1: the structural representation of electronic diopsimeter of the present utility model does not wherein mark computing system.
Fig. 2: the front view of infrared illumination lamp and correction of refractive errors system in the electronic diopsimeter of this utility model embodiment.
The specific embodiment
The embodiment electronic diopsimeter
The structure of exemplary electronic diopsimeter is shown in Fig. 1-2, and it comprises housing 5, plane electronics visual field screen 1, it is characterized in that having the cylindrical passage 51 of spying on the housing 5, and the circular open of spying on passage 51 can make the experimenter watch housing 5 inside outside housing 5; Spy on and equidistantly be equipped with 8 on the passage 51 column side face circumference and be used for sending ultrared infrared illumination lamp 4 to experimenter's eyeball; Spy on passage (51) the inside and link to each other, thereby close housing 5 inside with correction of refractive errors system 3; Correction of refractive errors system 3 is a runner dish, equidistantly be distributed with 12 correction of refractive errors eyeglasses 31 on this runner dish, wherein the rectification number of degrees of these 12 correction of refractive errors eyeglasses 31 be respectively+6 ,+5 ,+4 ,+3 ,+2 ,+1,0 ,-1 ,-2 ,-3 ,-4 and-5, make the experimenter can be successively be positioned at before the eyeball correction of refractive errors eyeglass 31 of 12mm and watch the plane electronics visual field of housing 5 to shield 1 by spying on passage 51 and seeing through one of these 12 correction of refractive errors eyeglasses 31; The thermal camera 2 that also has the infrared light that is used to take the reflection of experimenter's eyeball in the housing 5; And this electronic diopsimeter also has computing system, and described computing system is used for the demonstration of sighting target on the control plane electronics visual field screen 1, and is used to receive the taken experimenter's eyeball image of thermal camera 2 and the visual field of calculating the experimenter.Wherein, the plane electronics display screen can before and after slide, apart from the position of eyeball between 25-33cm.
Claims (10)
1. electronic diopsimeter with eye tracking and refraction compensation function, it comprises housing (5), plane electronics visual field screen (1), it is characterized in that, have the cylindrical passage (51) of spying on the housing (5), the circular open of spying on passage (51) can make the experimenter watch housing (5) inside outside housing (5); Spying on passage (51) column side face is equipped with and is used for sending ultrared infrared illumination lamp (4) to experimenter's eyeball; Spy on passage (51) the inside and link to each other, thereby close housing (5) inside with correction of refractive errors system (3); Have correction of refractive errors eyeglass (31) in the correction of refractive errors system (3), make the experimenter watch the plane electronics visual field in the housing (5) to shield (1) by spying on passage (51) and seeing through correction of refractive errors eyeglass (31) successively; The thermal camera (2) that also has the infrared light that is used to take the reflection of experimenter's eyeball in the housing (5); And this electronic diopsimeter also has computing system, and described computing system is used for demonstration that control plane electronics visual field screen (1) is gone up sighting target, and is used to the visual field that receives the taken experimenter's eyeball image of thermal camera (2) and calculate the experimenter.
2. the described electronic diopsimeter of claim 1 is characterized in that, the oblique irradiation of infrared illumination lamp (4) experimenter eyeball iris.
3. the described electronic diopsimeter of claim 2 is characterized in that, the angle of infrared illumination lamp (4) direction of illumination and experimenter's cornea is more than 150 degree.
4. the arbitrary described electronic diopsimeter of claim 1-3 is characterized in that, spies on equidistantly to be equipped with on passage (51) the column side face circumference to be used for sending ultrared a plurality of infrared illumination lamps (4) to experimenter's eyeball.
5. the described electronic diopsimeter of claim 4 is characterized in that, a plurality of infrared illumination lamps (4) are 8 infrared illumination lamps (4).
6. the described electronic diopsimeter of claim 1, it is characterized in that, have a plurality of correction of refractive errors eyeglasses (31) in the correction of refractive errors system (3), make the experimenter watch the plane electronics visual field in the housing (5) to shield (1) by a correction of refractive errors eyeglass (31) of spying on passage (51) and see through in these a plurality of correction of refractive errors eyeglasses (31) successively.
7. the described electronic diopsimeter of claim 6 is characterized in that, correction of refractive errors system (3) is a runner dish, equidistantly is distributed with a plurality of correction of refractive errors eyeglasses (31) on this runner dish.
8. the described electronic diopsimeter of claim 7 is characterized in that, equidistantly is distributed with 12 correction of refractive errors eyeglasses (31) on this runner dish.
9. the described electronic diopsimeter of claim 8 is characterized in that, the rectification number of degrees of 12 correction of refractive errors eyeglasses (31) are respectively+6 ,+5 ,+4 ,+3 ,+2 ,+1,0 ,-1 ,-2 ,-3 ,-4 and-5.
10. the described electronic diopsimeter of claim 1 is characterized in that, it is not fixed that plane electronics visual field screen (1) is gone up the sighting target that shows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201621761U CN201481388U (en) | 2009-02-18 | 2009-07-02 | Electronic perimeter with eyeball tracking and refractive compensation functions |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920067843.8 | 2009-02-18 | ||
| CN2009201621761U CN201481388U (en) | 2009-02-18 | 2009-07-02 | Electronic perimeter with eyeball tracking and refractive compensation functions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201481388U true CN201481388U (en) | 2010-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201621761U Expired - Lifetime CN201481388U (en) | 2009-02-18 | 2009-07-02 | Electronic perimeter with eyeball tracking and refractive compensation functions |
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| CN (1) | CN201481388U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012123549A1 (en) * | 2011-03-17 | 2012-09-20 | Carl Zeiss Meditec Ag | Systems and methods for refractive correction in visual field testing |
| CN103040436A (en) * | 2011-10-14 | 2013-04-17 | 上海美沃精密仪器有限公司 | Tilt-shift tomography eye scanning system and method thereof |
| CN105764405A (en) * | 2013-06-06 | 2016-07-13 | 6超越6视觉有限公司 | System and method for measurement of refractive error of eye based on subjective distance metering |
-
2009
- 2009-07-02 CN CN2009201621761U patent/CN201481388U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012123549A1 (en) * | 2011-03-17 | 2012-09-20 | Carl Zeiss Meditec Ag | Systems and methods for refractive correction in visual field testing |
| CN103429140A (en) * | 2011-03-17 | 2013-12-04 | 卡尔蔡司医疗技术股份公司 | Systems and methods for refractive correction in visual field testing |
| US8668338B2 (en) | 2011-03-17 | 2014-03-11 | Carl Zeiss Meditec, Inc. | Systems and methods for refractive correction in visual field testing |
| JP2014508015A (en) * | 2011-03-17 | 2014-04-03 | カール ツアイス メディテック アクチエンゲゼルシャフト | System and method for refraction correction in visual field inspection |
| CN103040436A (en) * | 2011-10-14 | 2013-04-17 | 上海美沃精密仪器有限公司 | Tilt-shift tomography eye scanning system and method thereof |
| CN103040436B (en) * | 2011-10-14 | 2016-01-06 | 上海美沃精密仪器有限公司 | One moves axle tomography eye scanning system |
| CN105764405A (en) * | 2013-06-06 | 2016-07-13 | 6超越6视觉有限公司 | System and method for measurement of refractive error of eye based on subjective distance metering |
| CN105764405B (en) * | 2013-06-06 | 2018-12-18 | 6超越6视觉有限公司 | Based on the not positive system and method for subjective distance measuring measurement ophthalmic refractive |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100526 |