Frequently Asked Questions

The prescription lens set contains pairs of high quality lenses with the following diopters: -6, -5, -4, -3, -2, -1.5, -1, -0.5, 0, 0.5, 1, 1.5, 2, 3, 4. A pair of 0 diopter plano lenses are included with the AdHawk MindLink. As an alternative, users may visit their optician with the AdHawk MindLink glasses to order custom prescription lenses.

The AdHawk MindLink glasses are designed with outdoor eye tracking in mind. The detectors in the system architecture are tuned (both in frequency and wavelength) to only detect light from the scanner modules, so the glasses are robust to sunlight. However, outdoor tracking in bright sunlight comes with challenges like smaller pupils, squinting eyelids and other human factors. All of these can affect the quality of eye tracking.

Yes we do! Product Brochure, Sample Data, and Technical Specs. A larger data sample set (380 megs) is available here.

The Quick Start is the fastest way to get eye tracking! A Quick start should be done at the beginning of every session. It performs an autotune to lock on to the location of an individual user’s eye, followed by 1 point calibration. More details about how and why to use quick start can be found here. 

Both documents can be found on our resource page. 

Better than 1 degree Mean Absolute Error (MAE) across an FOV of 40 degrees H and 25 degrees V.

Yes, both PC and mobile present the eye tracking data in real time over the world view camera. On PC various other outputs can be viewed in real time such as pupil size, vergence, and more.

The software does not generate a video of the eye, but it does provide a live view of key eye tracking features - the pupil outline and the glints.

The AdHawk MindLink ships with an API that will allow users to subscribe to various real-time eye tracking data streams. Available streams include: Gaze Angle (Binocular/L/R), Pupil Position, Vergence Angle, and Pupil Size. A SDK in both C and Python will also be included to assist developers with connecting the AdHawk MindLink to their applications.

Yes, the API allows you to control all aspects of the eye tracker including initialization and configuration, turning on and off various data streams as well as performing a calibration.

The API specification documentation can be found in the resource section of the support site.

The AdHawk MindLink system uses a tethered connection to the included Android mobile device or a Windows computer. We also have beta software for a tethered connection to a Mac computer. The software supports recording eye tracking gaze data and displays a live preview of a calibrated gaze marker superimposed on the world camera video. The data streams can also be received in real-time via the API and written to a CSV file for offline analysis. Data collected on the android device can be transferred to a PC when plugged in using the AdHawk hub by going Tools>Download Android Recordings.

The software allows researchers to capture and replay high speed eye tracking data from the AdHawk MindLink glasses. The recorded data includes gaze angle, pupil position, pupil size, validation data, meta data, and vergence. The software also displays and records video from the world camera with a gaze marker overlaid. Additional analysis features shall be added in future software updates and the expected data will be compatible with commercially available analysis tools.

The data streams can be fed into your own software to control any stimulus but they are provided by the API with a ~3ms latency so are real time. We do not have the ability to insert event markers on the gaze data with the included software. However, end users may subscribe to the streams via the API and implement that functionality on the user's end.

The software displays a real time video feed from the front facing camera with a calibrated gaze dot superimposed. This view can also be recorded for later review. We record the video at 30fps so excessive head movement may cause the video to be slightly blurred when their head is moving but when they are focusing on something, all the contents of the display on the screen will be visible.

On a PC the resolution is selectable:

High: 1920x1080p

Medium: 1280x720p

Low: 960x544p

On the mobile phone the resolution is fixed at 1280x720p. On both platforms the framerate is 30 fps.

82 Degrees diagonal

The mobile phone battery life is expected to be: 4 hours recording eye tracking and front facing camera, or 18 hours recording eye tracking only. These are estimates and subject to change depending on the particular circumstances of the eye tracking session. A laptop, or other PC should be used while plugged in, providing unlimited operation time.

The glasses themselves don't have a battery, they rely on the included Android device or a computer for power.

If encountered with an error or troubleshooting issue, please check our Troubleshooting Guide and if still unsolved after going through that, a report can be submitted.

If the target you are looking at is at a known distance from the eyes, we recommend turning off parallax correction, and setting the gaze depth. More information about parallax and its effects on eye tracking can be found here. 

Please ensure that the device is properly connected. If multiple cameras, such as webcams, are connected to the device, check the camera index on the left side of the AdHawk Hub to ensure the AdHawk Front Facing camera is selected.

We recommend performing a device calibration at the beginning of each session, with a minimum of once per week. If you are still not detecting one of the eyes after this, you may have selected the wrong nose piece. To select the right nosepiece for you please look at the Nosepiece selection guide. If you are still not detecting one or both of the eyes, a report can be submitted.