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FAQs
Are eye trackers intrusive?
No – ASL has a range of lightweight and wholly unobtrusive eye trackers designed to meet different research requirements.
Mobile Eye
The Mobile Eye is a truly tetherless, compact eye tracking system with eye tracking optics that are extremely lightweight and discreet. The recording device is small enough to be worn on a hip pack.
Desktop/Remote
ASL’s D6 system houses the optics, cameras and mirrors in a sleek, inconspicuous unit that fits directly under the stimulus display. This means it is practically invisible to the user and most users forget that their eyes are being tracked within seconds.
Head Mounted
ASL has eliminated the need for heavy cameras, wide visors and heavy helmets and has created the lightest, versatile and most comfortable head mounted eye tracking solutions available.
Why do ASL eye trackers have a separate control unit?
ASL systems consist of three major components;
- the control unit,
- compatible operating and analysis software, and
- interchangeable eye camera optics (remote, head-mounted, and/or long-range).
This unique design allows for evolving research projects and changing research needs. The control unit is compatible with a large number of PCs and monitor sizes giving researchers the flexibility to use any computer and display that meets their specific needs.
Importantly, all real time computations occur in the control unit – not in the PC where the Windows operating system can affect data output rates. Data output from the control unit is at a known constant rate, which is crucial for conducting eye tracking research where millisecond accuracy is required.
This also means that the eye tracker is not locked into a particular PC or operating system that may become obsolete. With the separate control until, the ASL solution can seamlessly adapt to its environments.
Why are ‘bright pupil’ optics preferable for indoor environments and ‘dark pupil’ for outdoor environments?
Bright pupil optics provide the best pupil image contrast in most indoor environments and similarly dark pupil provides the best contrast in most outdoor environments. For example, indoor systems that are based on dark pupil technology often have difficulty tracking people with blue eyes and any eye make up worn will typically prevent the eye tracker from working. ASL systems have been designed to offer the highest success rates for calibrating and tracking participants.
Are the eye trackers difficult to operate?
No – in fact many of the functions necessary to operate the eye trackers have been automated. For example, illumination, focusing, pupil and Corneal Reflection ‘thresholding’ and even calibration can be automated.
However, an important feature of the ASL systems is that it is possible to override and manually adjust these automated functions, which is necessary for more challenging participants. Indeed pupil size and iris colour can vary greatly and on some occasions it is necessary to make manual adjustments to successfully track them. With other eye tracking systems these manual functions are not available to the operator which means many participants are unable to be tracked successfully.
I have an older model ASL system – is it possible to upgrade to the latest model?
Yes – ASL offers an upgrade path whereby new modules and even entire new systems can be obtained at a discounted rate. One example is users of the series 5000 systems upgrading to the D6 system which incorporates video head tracking.
Contact Us today to discuss your eye tracking requirements