WO2022237954A1

WO2022237954A1 - Eye tracking module wearable by a human being

Info

Publication number: WO2022237954A1
Application number: PCT/EP2021/062311
Authority: WO
Inventors: Johannes Voigt; Frank Linsenmaier; Nils BERGER
Original assignee: Viewpointsystem Gmbh
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2022-11-17

Abstract

The present invention relates to an eye tracking module applicable directly to nose or to head of a user, by a holding frame portion stably and firmly adherent to the nose of an user or by a wire arranging the module around head of the user. The invention describe a wearable eye tracking module able to be connected to a remote device or a further device via internet.

Description

EYE TRACKING MODULE WEARABLE BY A HUMAN BEING

Applicant: Viewpointsystem GmbH

Inventors: Johannes Voigt, Frank Linsenmaier, Nils Berger

SPECIFICATION

TECHNICAL BACKGROUND

The present invention discloses an eye tracking module wearable by a human being, directly on her/his nose or head. The invention further deals with a method for applying the module to the nose/head of a human being.

Eye-tracking devices and in particular spectacles usually comprise a camera, which is oriented onto an eye of the spectacles wearer; the coordinates of the pupil and the viewing direction of the eye can be ascertained using such spectacles and displayed on a correspondent display computer device where a second user is able to watch the gaze direction of the wearer on his relevant field of view, via internet live streaming. Together with a so-called field of view video, which is prepared by a further field of view camera arranged on the spectacles in the viewing direction of a user, the point at which the user looks can be ascertained using such spectacles.

PRIOR ART

US2016/0206196 discloses eye-tracking spectacles comprising two eye cameras arranged in the nose frame of the glasses and a field of view camera in the middle of the glasses, showing the front scenery of the user.

The field of view camera is provided to record a field of view, video including individual and successive field of view images. The recordings of the two eye acquisition cameras and the at least one field of view camera can thus be entered in correlation in the field of view video of the respective gaze point.

Unfortunately this prior art document discloses eye tracking glasses having a frame similar to normal pair of glasses.

In addition are known semi finished eye tracking module which need to be implemented in augmented reality glasses or virtual reality glasses. These not finished products consist on a processor connected with two eye cameras via PCB/electronical connections, needing to be connected and integrated in a more complete and finished product.

Known semifinished eye tracking modules exploit the electronical and software architecture and well defined geometric structure of more complex devices like AR/VR glasses in order to be operative.

Known eye tracking devices have in any case eye glasses structure, this means that a user is obliged to wear eye glasses structure even if he/she has worn any eye glasses at all during his/her life, because of their perfect eyesight. It shall be pointed out that eyeglasses normal structure may obstacle the eyesight of the user, when the user look at certain extreme position of his/her field of view. These extreme positions correspond to extreme orientation directions of user's eyeballs, which could be out of region of influence of eye glasses lens.

Furthermore normal eyeglasses could move and slip from their optimal position on the nose of the user, because of normal/accidental movements of user's head or non correct arrangement of the nose pads/temples of the eye glasses over specific shape/dimension of the nose/ ears/head of the user. In addition using a eye glasses structure may interfere with a proper usage of certain technical instruments which require eyesight of the user, like microscope, telescopes, binocular.

However normal eye tracking glasses has nose pads related disadvantages; known nose pads are not able to prevent accidental slip of eye tracking spectacles on the nose, because their main purpose is only providing a correct and comfortable eye glasses support on user's nose. This side effect leads to eye tracking device calibration problems.

A further drawback of a normal eye glasses structure is that their position on a user's nose is continuously influenced by facial expression of the user, and again this side effect leads to eye tracking device calibration problems. PURPOSES OF THE INVENTION

One objective of the present invention, according to a first of its aspects, is obtaining an eye tracking module, being a finished product, ready to use once worn by the user directly on his/her nose/head and able to prevent accidental movements of the device in relation to a correct position to detect user's eyes. A second objective of the present invention is providing a user of an eye tracking module, having minimal impact, compact structure compared to normal eye glasses structure.

A third objective of the present invention is to provide an eye tracking module easily adaptable to different face shapes, in particular different noses/heads, easy to be cleaned and at the same time firmly adherent to user's nose/head, being not influenced by facial expressions of the user or accidental slip or movements of the device on the user's nose. A fourth objective of the present invention is to provide an eye tracking module able to not interfere with the user's field of view.

A further objective of the present invention is to provide an eye tracking module very light weighted and comfortable for the user. Another objective of the present invention is to provide an eye tracking device reliable, easy to be used by the user, with a reduced cost in respect to known eye tracking devices. A further objective of the present invention is obtaining an eye tracking module able to avoid accidental slip on the nose of the user, thus leading avoiding calibration problems of the module. Another objective of the present invention is to provide an eye tracking module placement method, easy to be implemented by a user.

SUMMARY OF THE INVENTION

Hereinafter are summarized some technical aspects of the present inventions which enable some of the most important purposes to be achieved.

According to a first aspect this invention relates to an eye tracking module configured to easily adhere to a nose of a user, comprising a frame comprising in turn a first frame part configured to perfectly adhere to the nose of a user when in use, said first frame part housing at least one left eye sensor and one right eye sensor, said eye sensors being arranged in the first frame part to detect pupil positions of the user when in use, said frame comprising a second part frame connecting the first part frame to a third part frame comprising at least a field of view camera configured to detect in a plurality of images the field of view of the wearer when in use, said eye tracking module further comprising electronical components namely at least a data processing unit, a memory, a data interface, said electronical component configured to connect the module to a computer device remotely connected or to other devices in general, and to send to said computer device eye movement information of the user wearing the eye tracking module.

Such module is very compact, can be easily applied to and released from nose of the user and can be used without a normal eye glasses structure and is able to send user's eye movement information to a computer device remotely connected or to other devices in general.

According to a second aspect this invention relates to a module wherein the frame is designed in various configuration in order to improve adhesion force of the module to the nose of the user.

According to a third aspect this invention relates to a module configured in such a way it can be applied to a wire surrounding user's head, in order to obtain a reliable and stably position of the eye tracking module over the user's nose, whose eye shall be detected by the module sensors.

According to a fourth aspect this invention relates to a method for firmly and stably placing the eye tracking module on a user's nose/head.

According to further aspects this invention relates to further module and method features claimed in the dependent claims of the present specification.

FIGURES

The structural and functional features of the present invention and its advantages with respect to the known prior art, will become even clearer from the underlying claims, and in particular from an examination of the following description, made with reference to the attached figures which show a preferred but not limited schematic embodiment of the invented method, system, device, in which:

Figure 1 and 2 illustrate respectively a front view and a back view of a first preferred embodiment of the module according to the present invention;

Figure 3 and 4 illustrate views of the first preferred embodiment of the module according to the present invention, once worn by the user;

Figure 5 illustrates a side view of the first preferred embodiment of the module according to the present invention;

Figure 6 illustrates a side view of a second preferred embodiment of the module according to the present invention;

Figure 7 illustrates a view of the second preferred embodiment of the module according to the present invention, once worn by the user;

Figure 8 illustrates a view of a third preferred embodiment of the module according to the present invention;

Figure 9 illustrates a view of the third preferred embodiment of the module according to the present invention, once worn by the user;

Figure 10 and 12 illustrate respectively a front view and a back view of a fourth preferred embodiment of the module according to the present invention;

Figure 11 illustrates a view of the fourth preferred embodiment of the module according to the present invention, once worn by the user.

DETAILED DESCRIPTION OF THE INVENTION

In general, this disclosure describes an eye tracking module wearable by a user, a method for firmly and stably placing the eye tracking module on the user's nose/head.

The specifications “right” or “left” or “high” or “low” or “front” or “back” relate to the intended manner of wearing eye glasses and the eye tracking module by a human being. It should highlight that for nose radix it is intended a depression at the root of the nose, which defines the nasal root and the origin of the nose from the point of the glabella. The radix extends inferiorly from the nasion to the level of a horizontal line passing through the lateral canthi, and superiorly from the nasion for an equivalent distance. Furthermore for nasal bones are intended two small oblong bones, varying in size and form in different individuals; they are placed side by side at the middle and upper part of the face and by their junction, form the bridge of the upper one third of the nose. Regarding eye tracking glasses in general, it shall be highlighted that they have at least a part of their frame having the purpose to retaining the lenses, which may be prescription lenses or sun lenses or specific filtering/protective lenses. Furthermore they have at least a portion, so called nose bridge, acting as a spacer between the two lenses, able to create the space for the user's nose.

In any case, normal eye glasses structure is not compact and may not be comfortable for a person who is not used to wear eye glasses at all. The eye tracking module, according to the present invention, comprises a frame 1, comprising in turn a first frame part 10, having the main purpose of guarantying a perfect and reliable adhesion of the module to the nose of a user when in use, and at the same time an easy and controlled release of the module when it is no more in use. Said first frame part 10 houses at least one left eye sensor 3 and one right eye sensor 4, said eye sensors 3, 4 being arranged in the first frame part 10 to detect pupil positions of the user when in use, as clearly visible in all figures of the present invention. The left and right eye sensors 3, 4 may be preferably eye cameras, but may be different kind of technologies like lasers able to scan user's eyes to detect position of pupils or micro electromechanical systems like for instance MEMS-based scanning elements. The frame 1 further comprises a second part frame 11, connecting the first part frame 10 to a third part frame 12, comprising in turn at least a field of view camera 5, configured to detect in a plurality of images the field of view of the user when in use, in order to determine continuously the user's gaze direction over his field of view, when eye tracking data are provided by the eye sensors 3, 4. The third part frame 12 is designed in such a way that the field of view camera 5 is placed just above the user's nose radix.

According to a preferred embodiment, the first frame part 10 comprises at least a couple of holding elements 100 adapted to be placed each one on the corresponding sidewall part of the nose in correspondence of the nose bones of the user, when in use (see fig. 3,

4)· According to a preferred embodiment, said holding elements 100 may be substantially arms, providing grip on the user's nose, supporting weight of the module and preventing the module from slipping downwards when in use. Said holding elements 100 are designed to cover a correspondent sidewall portion of the user's nose bones, as close as possible to user's nose radix, in particular just below the user's nose radix. It shall be highlighted that said holding elements 100 shall not extend towards the cartilage portion of the nose, to avoid discomfort for the user and any interference with her/her breathing.

The holding elements 100 comprise correspondent contact surfaces 101, being in contact with user's nose when in use, configured to perfectly adhere to correspondent sidewall part of the nose, providing anti-slip effect, controlled release, precise placement, repeatability of adhesion and release effect over time when in use. Even upper contact surface 111 and further contact surfaces 121 are designed to provide the same above mentioned technical effects.

In order to improve grip on the user's nose, such contact surfaces 101 may be treated with dry glue, such as nanotechnologies involving specialized keratinous foot-hairs called setae. In addition such contact surfaces 101 may be also treated with special glues, or materials improving grip, like for instance foam with different consistencies, or Grip Tape which has a sandpaper like texture on contact side, or like friction/ adhesive Tape, or even materials comprising very tiny hooks able to penetrate the very first layers of skin, without causing discomfort for the user. In addition, to achieve the same purpose already mentioned, such contact surfaces 101 may comprise mechanical means, like cantilever profile, comprising in turn a sort of elastic retaining lip, able to bend when in contact with user's nose, acting as a further holding force on the user's nose.

It shall be highlighted that, depending on the shape of the user's nose, in particular referring to different ethnic traits, the above mentioned grip treatments and grip solutions may be applied also to the upper contact surface 111 and possibly to the contact surfaces 121 of the further holding elements 120.

As anticipated, according to a further preferred embodiment, the first frame part 10 may comprise a further couple of holding elements 120, adapted to be placed each one on corresponding further sidewall portions of the nose, in correspondence of the nose bones of the user when in use, said further holding elements 120 comprising in turn contact surfaces 121 configured to adhere to further area of the sidewalls of the nose of the user (see figures 1 to 7).

In a further preferred solution, the further holding elements 120 are oriented along a horizontal direction H-H (see fig. 1 to 5), in order to further avoid overturning of the module, when the user moves his/her head up and down.

In a further preferred solution, the holding elements 100 are designed in such a way that their correspondent contact surfaces 101 are bigger at least three times the upper contact surface 111 of the second part frame 11 (see figures 10 to 12), in order to improve grip of the eye tracking module on the user's nose. As anticipated, the second part frame 11 comprises in turn an upper holding element 110 which may provide a further contact surface with the upper portion of the user's nose, namely upper contact surface 111 (see fig. 2, 12), further improving the adhesion of the eye tracking module to the user's nose when in use.

It must be highlighted that at least the first frame part 10 and the second part frame 11 may be made by soft and flexible materials, in order to further better adapt their shapes to the specific user's nose shapes and dimensions.

The preferred embodiments described so far can be easily released by the user, leveraging on a pair of divergent levers 130, provided in the second part frame 11, said levers 130 suitable to be moved closer by the user, thus moving away each holding element 100 from the user's nose, resulting the module easily released from the nose.

In order to avoid to use user's nose as a support for the present eye tracking module, a further embodiment provides for the use of user's head (see figure 8 to 9). In this case the eye tracking module comprises a frame 1, comprising in turn a first frame part 10, having a U shape configured to be adapted to the nose of a user when in use, said first frame part 10, housing at least one left eye sensor 3 and one right eye sensor 4, being arranged in the first frame part 10 to detect pupil positions of the user when in use.

In this case the frame 1 further comprises a second part frame 11, comprising in turn at least a field of view camera 5, configured to detect, in a plurality of images, field of view of the wearer when in use. This embodiment does not necessarily provides for contact surfaces with augmented grip to be in contact with the user's nose, because the eye tracking module is stably placed as close as possible to the nose radix of the user, by a suitable wire 4. The wire 4 surrounding the user's head, may be adaptable to circumference head and is attached to the frame 1 with known means. The wire 4 may be a power cable, thus being able to provide power to the eye tracking module and holding it in place at the same time when in use.

This preferred solution includes also in its frame 1 electronical components, namely at least a data processing unit, a memory, a data interface, said electronical component configured to connect the module to a computer device remotely connected or to other devices in general, and to send to said computer device eye movement information of the user wearing the eye tracking module.

The preferred head embodiments described so far can be easily released from/applied to the user's head by the user herself/himself, acting on the wire 4, that is adjusting its length through known means. A further preferred head embodiments (not disclosed in the figures) may comprise temples, an upper part frame connected to the frame 1 already described, comprising in turn a first frame part 10, having a U shape configured to be adapted to the nose of a user when in use, said first frame part 10, housing at least one left eye sensor 3 and one right eye sensor 4, being arranged in the first frame part 10 to detect pupil positions of the user when in use. In this embodiment as already explained, the frame 1 further comprises a second part frame 11, comprising in turn at least a field of view camera 5, configured to detect, in a plurality of images, field of view of the wearer when in use. Eve this embodiment does not necessarily provides for contact surfaces with augmented grip to be in contact with the user's nose, because the eye tracking module is stably placed as close as possible to the nose radix of the user, by the combination temples plus upper frame.

It shall be pointed out that the figures listed above, are schematic and it shall be intended that in all possible configurations described in this specification the frame 1 is able to include all mentioned electronical components. However, due to the integration of the eye sensors 3, 4 in the first frame part 10, the eye tracking module, do not have any protruding parts, and is therefore suitable to be worn in specific dangerous work environments.

As already anticipated, according to one preferred embodiment of eye tracking module, it is provided that at least one field of view camera 5 is arranged on the third frame part 12 of the eye tracking module. The field of view camera 5 records a field of view video, including individual and successive field of view images. According to a preferred solution eye sensors 3, 4 are eye cameras. Recordings of the two eye acquisition cameras 3, 4 and the at least one field of view camera 5 can thus be entered in correlation in the field of view video of the respective gaze point of the user. More than one field of view cameras may also be arranged in the third part frame 12-of the eye tracking module.

As anticipated the eye tracking module has electronical components like data processing unit and data interface, the data processing unit being connected to the right eye acquisition camera 4 and the left eye acquisition camera 3, in a preferred embodiment. The eye tracking module furthermore may have energy accumulator for the energy supply of the eye cameras 3, 4, or eye sensor 3, 4 in general and also the data processing unit, memory and the data interface. The eye tracking module furthermore may have an external power supply via cable, or an internal battery and a correspondent power interface, not shown in the schematic drawings.

Furthermore because of these electronical components are enclosed inside the relevant module frames and the module frame shapes being sealed and having no sharp edges, the module disclosed in the present invention is also easy to be cleaned.

It shall be highlighted that the entire recording, initial analysis, and storage of the recorded videos can thus be performed in or by the eye tracking module itself or by a computer device connected (wireless or via cable) to the eye tracking module.

A data processing unit may be preferably designed as a combination of a microcontroller or processor together with a RAM. The data processing unit is connected in a signal conducting manner to a data interface. It can also be provided that the data interface and the data processing unit are formed jointly in hardware, for example, by an ASIC or an FPGA. The interface is preferably designed as a wireless interface, for example, according to the Bluetooth standard or IEEE 802.x, or as a wired interface, for example, according to the USB standard, wherein in this case the eye tracking module has a corresponding socket, for example, according to micro-USB. Additional sensors might be inserted in the eye tracking module and connected to the data processing unit.

The data processing unit, the memory and the data interface may be connected at least indirectly to an energy accumulator by circuitry, and are connected in a signal-conducting manner to the three cameras, i.e. the field of view camera 5, the right eye acquisition sensor 4, and the left eye acquisition sensor 3, in a preferred embodiment of the present invention.

As already mentioned, the present eye tracking module is able to communicate with other common devices, like smartphones, machinery, computer devices in general.

In a further embodiment the first frame part 10 may further comprises a left Infrared LED illuminator 30 and a right Infrared LED illuminator 40 when the eye sensors 3, 4 are cameras, said Infrared LED illuminators helping to better detect pupil positions of the wearer's eyes, when in use.

In case eye sensors 3, 4 are micro electromechanical components like for instance MEMS- based scanning elements or photo detectors, the first frame part 10 further comprises correspondent left emitter 30 and a right emitter 40 designed to send a correspondent signal to user's eye able to be detected by said micro electromechanical components. Emitters may be of any kind of technology for instance IR lasers or LED or structured light emitters or VCSEL, able to detect user's pupil position.

As already described, the frame 1, where these electronical components are arranged, encloses them, conferring them protection against accidentals hits, dust or in general external agents which might compromise said component operations. The eye tracking module is therefore able to give to a further computer device remotely connected or to other devices in general, gaze information identifying movements of the user's gaze, once the module is worn by the user. Said information are in general represented by visual points on related visual representations of the field of view of the user wearing the eye tracking module. The module disclosed in the present invention, due to its dimension reduced size and to its described configuration, results in a very light weighted module, not affecting the user's comfort even during a extensive use.

The present invention further relates to a method for firmly and stably placing an eye tracking module on an user's nose comprising the following steps: -provide an eye tracking module said module comprising a frame 1 comprising a first frame part 10 housing at least one left eye sensor 3 and one right eye sensor 4, said eye sensors 3, 4 being arranged in the first frame part 10 to detect pupil positions of the user when in use, said frame 1 comprising a second part frame 11 connecting the first part frame 10 to a third part frame 12 comprising at least a field of view camera 5 configured to detect in a plurality of images the field of view of the wearer when in use, said eye tracking module further comprising electronical components namely at least a data processing unit, a memory, a data interface, said electronical component configured to connect the module to a computer device remotely connected or to other devices in general, and to send to said computer device eye movement information of the user wearing the eye tracking module, the first frame part 10 comprising in turn holding elements 100 which comprise in turn contact surfaces 101 configured to provide controlled adhesion force when said contact surfaces 101 are in contact with the user's sidewall nose and user-controlled release action from the user's nose, when no more in use;

- make the first frame part 10 perfectly adherent to the nose of a user, acting on a couple of holding elements 100 of the first frame part 10 adapted to be placed each others on correspondent sidewall parts of the nose of the user, said holding elements 100 comprising in turn a contact surface 101 configured to adhere to the sidewall part of the nose of the user, in correspondence of the nose bones.

Further steps of the above mentioned method may comprise:

- make the second frame part 11 perfectly adhere to the upper nose part of a user, placing the upper holding element 110 on correspondent upper part of the nose of the user in correspondence of the nose bones. The present invention furthermore relates to the method for stably and firmly placing an eye tracking module on a user's nose, wherein the eye tracking module has structures and features already described in this specification, according to all the embodiments described. The present invention furthermore relates to the method for realising an eye tracking module from a user's nose wherein the eye tracking module has structures and features already described in this specification, according to all the embodiments described.

Claims

1. An eye tracking module configured to easily adhere to/be released from nose of a user thus being able to prevent accidental movements of the device in relation to a correct position to detect user's eyes, said module comprising a frame (1) comprising in turn a first frame part (10) configured to perfectly adhere to the nose of a user in correspondence of the nasal bone of the user when in use, said first frame part (10) housing at least one left eye sensor (3) and one right eye sensor (4), said eye sensors (3, 4) being arranged in the first frame part (10) to detect pupil positions of the user when in use, said frame (1) comprising a second part frame (11) connecting the first part frame (10) to a third part frame (12), comprising at least a field of view camera (5) configured to detect in a plurality of images the field of view of the user when in use, said eye tracking module further comprising electronical components namely at least a data processing unit, a memory, a data interface, said electronical component configured to connect the module to a computer device remotely connected or to other devices in general, and to send to said computer device eye movement information of the user wearing the eye tracking module when in use, wherein the first frame part (10) is configured in such a way that it comprises at least a couple of holding elements (100) adapted to be placed each one on corresponding sidewall parts of the nose of the user when in use, said holding elements (100) comprising in turn correspondent contact surfaces (101) configured to provide controlled adhesion force when said contact surfaces (101) are in contact with the user's nose sidewall correspondent parts and user-controlled release action from the user's nose, when the module is no more in use.

2. The module according to claim 1, wherein the second part frame (11) comprises an upper holding element (110) adapted to be placed on the upper part of the nose of the user when in use, said upper holding element (110) comprising in turn an upper contact

1 surface (111) configured to provide controlled adhesion force when said upper contact surface (111) is in contact with the user's upper nose part and user-controlled release action from the user's nose, when the module is no more in use.

3. The module according to claim 2, wherein the first frame part (10) is configured in such a way that it comprises at least a further couple of holding elements (120) adapted to be placed each one on further sidewall parts of the nose of the user when in use, said further holding elements (120) comprising in turn correspondent further contact surfaces (121) configured to provide controlled adhesion force when said further contact surfaces (121) are in contact with correspondent user's further sidewall nose parts and user-controlled release action from the user's nose, when the module is no more in use.

4. The module according to claim 3 wherein said further couple of holding elements (120) are oriented along a horizontal direction, in order to prevent possible accidental overturning of the module when in use.

5. The module according to claims 1 or 2 wherein said couple of holding elements (100) have their correspondent contact surface (101) bigger at least three times the upper contact surface (111) of the second part frame (11).

6. The module according to any of the preceding claims, wherein the first part frame (10) and the second part frame (11) are flexible, in order to make the module adaptable to different user's nose shapes and dimensions. 7. The module according to any of the preceding claims 2 to 6, wherein the contact surface

(101) and/or the upper contact surface (111) and/or the further contact surfaces (121) are treated with dry glue, in order to improve the module adhesion force of the module on the nose of the user when in use.

8. The module according to any of the preceding claims 2 to 7, wherein the holding elements (100) and/or the upper holding elements (110) and/or the further contact

2 surfaces (121) comprise at least one mechanical cantilever profile, able to bend when in contact with user's nose, acting as a further holding force on the user's nose when in use.

9. The module according to any of the preceding claims 2 to 8 wherein the second part frame (11) comprises a pair of divergent levers (130), designed to be brought closer together, when the user wants to detach the module from his/her nose.

10. The module according to any of the preceding claims wherein the eye sensors (3, 4) are cameras or micro electromechanical components or photo detectors.

11. The module according to claim 10 further comprising a left Infrared LED illuminator (30) and a right Infrared LED illuminator (40), which help to better detect pupil positions of the wearer's eyes, when sensors (3, 4) are cameras.

12. An eye tracking module configured to easily being stably arranged on the head of a user, thus being able to prevent accidental movements of the device in relation to a correct position to detect user's eyes, said module comprising a frame (1) comprising a first frame part (10) having a U shape configured to be adapted to the nose of a user when in use, said first frame part (10) housing at least one left eye sensor (3) and one right eye sensor (4), said eye sensors (3, 4) being arranged in the first frame part (10) to detect pupil positions of the user when in use, said frame (1) comprising a second part frame (11) comprising at least a field of view camera (5) configured to detect in a plurality of images the field of view of the wearer when in use, said eye tracking module further comprising electronical components namely at least a data processing unit, a memory, a data interface, said electronical component configured to connect the module to a computer device remotely connected or to other devices in general, and to send to said computer device eye movement information of the user wearing the eye tracking module, said module further being configured to be attached to a wire (4) surrounding firmly and stably the head of the user when in use.

3 13. The eye tracking module according to claim 12 wherein the sensors (3, 4) are cameras or micro electromechanical components or photo detectors.

14. A method for firmly and stably placing an eye tracking module on an user's nose comprising the following steps: -provide an eye tracking module said module comprising a frame (1) comprising a first frame part (10) housing at least one left eye sensor (3) and one right eye sensor (4), said eye sensors (3, 4) being arranged in the first frame part (10) to detect pupil positions of the user when in use, said frame (1) comprising a second part frame (11) connecting the first part frame (10) to a third part frame (12) comprising at least a field of view camera (5) configured to detect in a plurality of images the field of view of the wearer when in use, said eye tracking module further comprising electronical components namely at least a data processing unit, a memory, a data interface, said electronical component configured to connect the module to a computer device remotely connected or to other devices in general, and to send to said computer device eye movement information of the user wearing the eye tracking module, the first frame part (10) being configured in such away that it comprises at least a couple of holding elements (100), said holding elements (100) comprising in turn contact surfaces (101) configured to provide controlled adhesion force when said contact surfaces (101) are in contact with the user's sidewall nose and user- controlled release action from the user's nose, when the module is no more in use; - make the first frame part (10) perfectly adhere to the nose of a user, placing the holding elements (100) of the first frame part (10) each one on correspondent sidewall parts of the nose of the user in correspondence of the nose bones.

15. The method according to claim 14 further comprising the following steps:

-provide the eye tracking module wherein the second part frame (11) comprises an upper holding element (110) adapted to be placed on the upper part of the nose of the user;

4 - make the second frame part (11) perfectly adhere to the upper nose part of a user, placing the upper holding element (110) on correspondent upper part of the nose of the user in correspondence of the nose bones.

5