WO2006128939A2 - Dispositivo captador de movimientos oculares - Google Patents
Dispositivo captador de movimientos oculares Download PDFInfo
- Publication number
- WO2006128939A2 WO2006128939A2 PCT/ES2006/000325 ES2006000325W WO2006128939A2 WO 2006128939 A2 WO2006128939 A2 WO 2006128939A2 ES 2006000325 W ES2006000325 W ES 2006000325W WO 2006128939 A2 WO2006128939 A2 WO 2006128939A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- helmet
- eye
- eyes
- head
- movements
- Prior art date
Links
- 230000004424 eye movement Effects 0.000 title claims abstract description 32
- 210000003128 head Anatomy 0.000 claims abstract description 43
- 238000009434 installation Methods 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000012937 correction Methods 0.000 claims description 3
- 238000011156 evaluation Methods 0.000 claims description 3
- 210000001061 forehead Anatomy 0.000 claims description 3
- 208000004350 Strabismus Diseases 0.000 description 14
- 210000000744 eyelid Anatomy 0.000 description 6
- 230000007170 pathology Effects 0.000 description 5
- 201000010099 disease Diseases 0.000 description 4
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000004433 ocular motility Effects 0.000 description 4
- 208000019749 Eye movement disease Diseases 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000004899 motility Effects 0.000 description 3
- 230000003236 psychic effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 208000012661 Dyskinesia Diseases 0.000 description 2
- 206010015995 Eyelid ptosis Diseases 0.000 description 2
- 208000004929 Facial Paralysis Diseases 0.000 description 2
- 208000015592 Involuntary movements Diseases 0.000 description 2
- 208000036826 VIIth nerve paralysis Diseases 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 206010005159 blepharospasm Diseases 0.000 description 2
- 230000000744 blepharospasm Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000004399 eye closure Effects 0.000 description 2
- 208000030533 eye disease Diseases 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000004886 head movement Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 230000017311 musculoskeletal movement, spinal reflex action Effects 0.000 description 2
- 206010029864 nystagmus Diseases 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 201000003004 ptosis Diseases 0.000 description 2
- 230000001148 spastic effect Effects 0.000 description 2
- 230000002747 voluntary effect Effects 0.000 description 2
- 201000005538 Exotropia Diseases 0.000 description 1
- 206010020880 Hypertrophy Diseases 0.000 description 1
- 206010033799 Paralysis Diseases 0.000 description 1
- 206010036590 Premature baby Diseases 0.000 description 1
- 206010047571 Visual impairment Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000000739 chaotic effect Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 201000006325 cyclotropia Diseases 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000007850 degeneration Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000004720 fertilization Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000003100 immobilizing effect Effects 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 230000003340 mental effect Effects 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000001454 recorded image Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000037390 scarring Effects 0.000 description 1
- 210000003625 skull Anatomy 0.000 description 1
- 238000011477 surgical intervention Methods 0.000 description 1
- 208000029257 vision disease Diseases 0.000 description 1
- 230000004393 visual impairment Effects 0.000 description 1
- 230000021542 voluntary musculoskeletal movement Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/113—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for determining or recording eye movement
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
Definitions
- the present invention applies to the field of ophthalmology, in particular for the detection, monitoring and optimization of the subsequent treatment of pathologies related to certain abnormalities in ocular motility, such as those caused by facial paralysis, strabismus (ocular deviation), blepharospasm (closes spastic eyes), nystagmus
- the eye movement sensing device that is recommended comprises a helmet, applicable to both adult and child patients, which incorporates recording means of the eyes, preferably a video camera for both eyes or one for each eye, that register them in images seen from an angle that allows to capture all their movements, which is the angle of the look in maximum infraction, that is, downwards.
- the helmet has a light projector that emits luminous points towards a screen, which makes the patient look to be subjected to a Very precise eye examination of the anomalies mentioned and optimize the diagnosis.
- the object of the invention is that the patient may have the freedom to move the head when looking at the visual tests that are normally subjected to during an ophthalmological examination, allowing a more pleasant and shorter duration examination, the results of which are not affected by said voluntary or involuntary movements of the head.
- strabismus Normally, when a person fixes their attention on an object and follows it with their eyes, their two eyes move in unison keeping focused on the same point. But if certain pathologies occur in the subject, this does not happen that way and some people, mostly children, suffer a deviation from one eye to the other, so that while one eye remains fixed looking at one point (fixing eye), the other It does not, but remains in a deviant position (deviant or strabular eye). This ophthalmic disease is known as strabismus. There are many ways to divide strabismus classes, one of the most important is that which depends on the variability of ocular deviation:
- Incomitants the deviation of the eyes varies according to the positions of the gaze or only manifests itself in some of them.
- strabismus produced by paralysis of the nerves that are directed to the muscles or by injuries of the muscles themselves (degeneration or scarring).
- the strabismus is classified into:
- strabismus detection means do not allow the deviation of the eyes to be measured at all points of a person's ocular motility field.
- this method and the device that executes it are based on the use of a pair of video cameras arranged frontally, in the visual axis of each eye respectively, but its position does not allow to register its entire visual field and, in particular, makes it impossible record a look down, since the upper eyelid covers the eye.
- Another deficiency is that the video cameras are fixed recording only the eyes, but no means are provided to capture the movements of the head, so the ocular motility detected with this method and apparatus is not correct if the patient, as is the usual case in infants or mentally handicapped, moves his head.
- the fixed screen which is located in front of the subject and has multiple light points, incorporates a video camera in the center to record both eyes at the same time.
- the camera therefore also fixed, as in the previous apparatus, of WO 93/19661, also cannot pick up the movement of the eyes when the patient looks down, being very sensitive to small head displacements that, even with the Fixing tapes, the person does by turning the eyes in a sideways look, which distorts the evaluation of ocular deviation.
- Infrareds are also used to measure ocular motility, having an infrared detector for each eye, but these detectors do not move together with the head, but the measures captured from eye movements are independent of those taken on whether the patient move your head Children or even adults with some mental or physical disturbance that causes chaotic movements of the head can cause too large displacements of the position of their head, making it almost impossible to make reliable calculations of the movements of the eyes with respect to the point at which the look, being able to easily get out of the area of uptake marked by infrared detection means.
- the operation of this system implies its exclusive application to very collaborating adults to be really effective, at least in the conceptual aspect.
- the present invention solves, among other things, the aforementioned problem, in a fully satisfactory manner in each and every one of the different aspects mentioned, offering interesting advantages over the background.
- the invention described is designed for the capture of eye movements, in view of its application in the detection of abnormalities derived from strabismus or other diseases of the eyes and eyelids, in all types of patients, from adults in full Possession of their psychic and physical faculties to children under six years of age who do not provide sufficient collaboration in an ophthalmological examination.
- the eye movement sensing device that is recommended comprises a helmet, in short, an ergonomically designed device for the head, which incorporates recording means of the eyes that basically consist of at least one camera, preferably video, for recording images of each of the eyes.
- the ergonomic device that captures eye movements is designed according to different variants:
- the helmet has two cameras located at the height of the cheeks and can record the mobility of each eye separately as well as both simultaneously.
- the helmet is equipped with a single camera centered on the front, with the objective of the camera directed downwards, which captures the ocular movements reflected by means of two mirrors near the eyes, provided in the same helmet; Thus, in a tiny mirror for each eye, their movements are reflected and recorded by a single central chamber.
- This second alternative embodiment of the invention is also applicable for ocular examination in adults.
- another helmet of smaller size is foreseen, which in turn is coupled to the main helmet that incorporates the camera, normally fitting the smaller one inside the first one, which is constructed with dimensions corresponding to the skull of an adult of great perimeter.
- the construction of the helmet can be of the integral type, which fits directly to the head, or have conventional fixing means, such as an elastic band, ribbons with sailboat or other known fasteners or an adjustable arch of the type with which currently support indirect ophthalmoscopes at the head of the ophthalmologist.
- the posterior third of the helmet is left open so that, when the patient is seated for a more comfortable examination, the headrest on the back of an armchair does not affect the position of the helmet with respect to the head.
- the camera or the two cameras used in the possible embodiments of the device located in the described ways, have the ability to record the eyes moving in the coronal plane, at 270 ° (6h) looking at the patient's face in front, so as in the sagittal plane, about 240 °, looking from the patient's right profile.
- the cameras built into the helmet are high resolution, low weight and with the possibility of capturing images with a high discrimination of colors, in the precise luminosity conditions that are required for the ophthalmological examination, in order to subsequently allow a digital processing of said images in a computer system that can be Stream the recordings.
- the helmet of the eye movement sensing device has a support for corrective glasses, when the patient needs them due to their visual impairment, so that said support with the optical correction crystals does not hinder the recording made by the helmet cameras.
- the helmet of the invention intended to be used as an integral part of an ophthalmological examination facility, will incorporate in its upper part a light projector, preferably a laser emitter, whereby the projector of the luminous point at which it is made to look at the During the examination, the patient moves in unison with the head if the patient moves it.
- a light projector preferably a laser emitter
- both the projector and the cameras that capture the eye movements move together with the head, minimizing the mismatches that may arise of taking the images that must be processed at a later stage by means of a computer to which the recorded images are transferred.
- the described device Integrated into an ophthalmologic facility, which usually comprises at least one chair for the patient to comfortably sit the exam and a screen where the target light point is projected, the described device presents significant improvements with respect to the background seen.
- the main advantage of the device of the invention is that the patient has freedom to move the head, within the limits marked reasonable by the situation in which the person is seated to be subjected to the exploration, while in the aforementioned documents it is essential that the head be still so that the measures resulting from the exploration are reliable and, specifically in the apparatus of US 5094521, the use of tapes to force the head to be in a fixed position, which makes these prior art apparatus inadequate, especially for use with child patients.
- EP 0940117 the improvement of the invention, which is also observed when compared with the other documents, is that the sensors of the eye movements, the two cameras or the camera assembly more mirrors integrated into the helmet, they move with the head.
- EP 0940117 where there is also talk about a helmet and some movement sensors, by infrared, both of the eyes and of the head that is not forced in a fixed position, said eye movement sensors are separated from the helmet, so when the head moves chaotically in space, the calculation of eye movements with the other infrared sensors outside the helmet would be unreliable.
- the tests with luminous points that are made in the ophthalmological examination are also linked to head displacements .
- these tests with points of light are projected in a way that is unrelated to any possibility that the patient moves the head, distorting the reference measurements of the position of the gaze and the objective point at which the person looks.
- the invention has other utilities in ophthalmology, such as other eye diseases that can be evaluated by capturing images on eye movements for subsequent computer analysis of parameters that may appear in A frame of one eye.
- other eye diseases that can be evaluated by capturing images on eye movements for subsequent computer analysis of parameters that may appear in A frame of one eye.
- nystagmus which is an involuntary high-speed eye vibration, with cameras in the helmet capable of recording more than 25 frames per second.
- Figure 1 shows a schematic representation of the installation for ophthalmological exams where the eye movement sensing device of the invention is applied, illustrating the helmet comprising the device, according to a preferred embodiment, placed on the head of a patient.
- Figure 2. Shows schematic and detailed representations of the laser light projector incorporated into the helmet in a preferred embodiment.
- Figure 3. Shows a front view of the helmet that incorporates in a video camera under the light projector and two mirrors under the eyes to reflect the eye movements that are recorded by said camera, according to the object of the invention.
- Figure 4. Shows a side and detailed view of the helmet chamber and one of the mirrors under the eye, according to the embodiment of the helmet illustrated in the previous figure.
- Figure 5. Shows a view from above and another side of the helmet according to another possible embodiment, in which there are two video cameras, one under each eye for recording their respective movements, according to the object of the invention.
- Figure 6. Shows a front view of the face of a patient, where the situation of the coronal plane is indicated, where the means of capturing the eye movements are placed facing the front.
- Figure 7. Shows a side view of the face of a patient, where the situation of the sagittal plane is indicated, where the means of capturing eye movements are placed, viewed from the right side.
- Figure 8 shows an alternative embodiment of the invention, of special application in children, which consists of incorporating a second minor helmet, adapted to the size of the head, attachable to the helmet that has the means of recording images represented in the Figures 1, 3 or 5.
- the eye movement sensing device comprises a helmet (1) that fits the head of a subject who undergoes an ophthalmological examination in an installation, where the subject sits comfortably in a seat ( 10) and in front of which there is a projection screen (11) of luminous points, located at an appropriate distance for the exam, having oriented the seat
- the helmet (1) incorporates a light projector (2), located in its upper, frontal and central part, which emits a luminous point towards the projection screen (11).
- a preferred embodiment can be described which consists of incorporating into the helmet (1) a light projector (2) emitting a laser beam, so that it is projected on the projection screen (11) as a . circular image or a luminous point.
- a laser light projector (2) comprises a rotating sphere with a laser pointer (3) that shoots the beam through the surface of the sphere forward in a specific direction, up, down, right or left, covering angles of up to 60 ° in the rotation of the sphere with the pointer (3), which is achieved by the action of an electric motor (4), incorporated into the helmet (1).
- said helmet (1) incorporates a video camera (6 ) which focuses its objective downwards, with a pair of mirrors (7) being provided in the lower part of the helmet (1), under each eye respectively on one side of the helmet (1), where the different eye movements that are registered by the video camera (6).
- a video camera (6 ) which focuses its objective downwards
- a pair of mirrors (7) being provided in the lower part of the helmet (1), under each eye respectively on one side of the helmet (1), where the different eye movements that are registered by the video camera (6).
- FIG. 5 Another alternative is the one shown in Figure 5, where the helmet (1) has two. video cameras (5), instead of one, arranged respectively (1) under the eyes, at the height of the subject's cheeks, instead of being placed on the forehead as in the previous embodiment of the helmet (1).
- video cameras (5) directly capture all eye movements when located under each of them.
- the video cameras (5, 6) are light, around a weight of 60-90 grams, with a high resolution, since at least 200 to 400 pixels of resolution are required to capture all the positions of one end to the other of one eye, considering its maximum angle of movement, which is about 100 °.
- the helmet (1) in any of its possible configurations incorporates in its front part a support for corrective glasses (9) of the vision, which are integrated in the helmet (1) out of the way of focusing of the cameras (5, 6), so that the correction crystals (9) do not hinder the recording of the eyes.
- the helmet (1) In order to anatomically adapt the helmet (1) to the patient's own head size, it is planned to build 2 or 3 different sized helmets considering the different ages and cranial perimeters. In addition, another helmet of smaller size between the previous one and the head will exert the functions of adjustment of the size to the perfection (8, 10). There should be several sizes of this second helmet between the main and the head.
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Ophthalmology & Optometry (AREA)
- Animal Behavior & Ethology (AREA)
- Veterinary Medicine (AREA)
- Biophysics (AREA)
- Public Health (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Human Computer Interaction (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Eye Examination Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2006800282143A CN101232841B (zh) | 2005-06-03 | 2006-06-02 | 眼动传感器 |
EP06778446A EP1911393B1 (en) | 2005-06-03 | 2006-06-02 | Eye movement sensor device |
CA2610409A CA2610409C (en) | 2005-06-03 | 2006-06-02 | Eye movement sensor |
US11/916,156 US7931370B2 (en) | 2005-06-03 | 2006-06-02 | Eye movement sensor device |
JP2008514130A JP4917598B2 (ja) | 2005-06-03 | 2006-06-02 | 眼球運動センサ装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ESP200501342 | 2005-06-03 | ||
ES200501342A ES2264383B1 (es) | 2005-06-03 | 2005-06-03 | Dispositivo captador de movimientos oculares. |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2006128939A2 true WO2006128939A2 (es) | 2006-12-07 |
WO2006128939A3 WO2006128939A3 (es) | 2007-02-08 |
Family
ID=37482020
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/ES2006/000325 WO2006128939A2 (es) | 2005-06-03 | 2006-06-02 | Dispositivo captador de movimientos oculares |
Country Status (7)
Country | Link |
---|---|
US (1) | US7931370B2 (es) |
EP (1) | EP1911393B1 (es) |
JP (1) | JP4917598B2 (es) |
CN (1) | CN101232841B (es) |
CA (1) | CA2610409C (es) |
ES (1) | ES2264383B1 (es) |
WO (1) | WO2006128939A2 (es) |
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WO1996036271A1 (de) * | 1995-05-15 | 1996-11-21 | Leica Ag | Verfahren und vorrichtung zum parallelen erfassen von sehinformation |
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DE19809591A1 (de) | 1998-03-06 | 1999-09-09 | Neuhof | Vorrichtung und Verfahren zur Darbietung von bewegten oder unbewegten Seheindrücken zur automatischen und umfassenden Erfassung zahlreicher Parameter des Betrachters |
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JP3925222B2 (ja) * | 2002-02-07 | 2007-06-06 | コニカミノルタホールディングス株式会社 | 視線検出装置 |
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DE10251933B4 (de) * | 2002-11-08 | 2006-12-14 | Ludwig-Maximilians-Universität München (Körperschaft des öffentlichen Rechts) | Aufnahmevorrichtung für die kopfgestützte Bilderfassung und Verfahren zur Steuerung der Aufnahmevorrichtung |
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2005
- 2005-06-03 ES ES200501342A patent/ES2264383B1/es active Active
-
2006
- 2006-06-02 EP EP06778446A patent/EP1911393B1/en not_active Not-in-force
- 2006-06-02 CA CA2610409A patent/CA2610409C/en not_active Expired - Fee Related
- 2006-06-02 JP JP2008514130A patent/JP4917598B2/ja not_active Expired - Fee Related
- 2006-06-02 US US11/916,156 patent/US7931370B2/en not_active Expired - Fee Related
- 2006-06-02 WO PCT/ES2006/000325 patent/WO2006128939A2/es active Application Filing
- 2006-06-02 CN CN2006800282143A patent/CN101232841B/zh not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
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See references of EP1911393A4 * |
Also Published As
Publication number | Publication date |
---|---|
CA2610409C (en) | 2013-09-10 |
CN101232841A (zh) | 2008-07-30 |
ES2264383B1 (es) | 2007-11-16 |
CN101232841B (zh) | 2010-06-16 |
JP4917598B2 (ja) | 2012-04-18 |
EP1911393A4 (en) | 2011-08-24 |
EP1911393A2 (en) | 2008-04-16 |
US20080192204A1 (en) | 2008-08-14 |
CA2610409A1 (en) | 2006-12-06 |
JP2008541909A (ja) | 2008-11-27 |
WO2006128939A3 (es) | 2007-02-08 |
ES2264383A1 (es) | 2006-12-16 |
US7931370B2 (en) | 2011-04-26 |
EP1911393B1 (en) | 2012-12-26 |
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