Eye Tracker
You can configure and set a eyetuitive eye tracker from the company GazeFirst or a Skyle eye tracker from the company eyeV as an input device for Semanux Access.
You can find the settings for the eye tracker under Type of Settings: All > Input > Eye Tracker.
You need an eye tracker of the type eyeuitive (first generation) from the company GazeFirst or an eye tracker of the type Skyle (second or third generation) from the company eyeV. These are available through specialized retailers. Connect the eye tracker to your computer according to the manufacturer user manual and position it centrally below your screen.
The eye tracker determines the position of your gaze on the screen and transmits these coordinates to Semanux Access. Here, you can then perform actions with Semanux Access, e.g., a mouse click.
To activate the eye tracker as input in Semanux Access, check the box for Activate Eye Tracker as input. The status of the eye tracker will be displayed in the box below. Eye tracker tracking is prioritized by Semanux Access, while the video stream may be displayed with a delay. You can use the video stream to optimally position yourself in front of the screen.
In the Configuration section, you can specify whether the eye tracker should consider your left eye, right eye, or both eyes. We recommend having both eyes considered by the eye tracker if possible.
You can adjust both the fixation and saccade filtering. A fixation occurs when you focus on a point on the screen. A saccade occurs when you move your gaze from one point on the screen to another. For both, you can determine with the filtering whether the eye tracker should respond reactively but perhaps jerkily or smoothly but perhaps slower.
Check the box for Show a dialog for eye tracking issues to quickly recalibrate the eye tracker:
You can trigger this dialog, for example, by moving away from the eye tracker or closing your eyes for a moment.
In the Calibration section, you can calibrate the eye tracker. The eye tracker should be recalibrated both before the first use and regularly to give you the best user experience. When you start the calibration, several points will appear on the screen in sequence. Fixate on these with your gaze and do not let your eyes wander during this time to achieve the most accurate result possible.
The number of calibration points affects the accuracy of determining your gaze position. The more points you use, the more accurate the result, but the longer the calibration process takes. We recommend starting with 9 points at the beginning and trying fewer calibration points later when you are more accustomed to the eye tracker.
We recommend turning off the Trace when using the eye tracker. Although displaying the trace may initially provide reassurance for new users of eye-tracking devices, studies in the field of human-computer interaction show that user experience and accuracy improve in the long term if the trace is turned off for the user.
The eye tracker can be used independently or as a complement to head direction control.
First, select Eye Tracker and then Gaze Direction as the absolute input type in Express Mode.
You can then either disable the Precision Mode or use it as a complement. It is particularly suitable as a complement if you are working with very detailed user interfaces. Then use one of the known input options such as head or controller under Input for Precision Mode.
Frequent questions
For this you need an eyetuitive eye tracker from GazeFirst or a Skyle eye tracker from eyeV.
The easiest way to use it with Semanux Access is to select the Preset: Only eye movement during first setup. This also describes how the eye control then works.
More information under Settings: Eye Tracker.
This is probably because your eye tracker is not properly connected to the computer. Try unplugging the cable that goes from your eye tracker to the computer and plugging it in again. Then click on Reconnect. It may also help if you restart Semanux Access or your computer.
Under Microsoft Windows 10 it may be that the connection must first be set up in your operating system. To do this, eyeV has published instructions. Then click on Reconnect again.
Either your eye tracker is not yet calibrated correctly or you have moved your head too much since the last calibration. It is best to perform a new eye tracker calibration.