Advanced Eye-Tracking Solutions for Precise Gaze Analysis

Eye-tracking refers to a collection of technologies for sensing where a person is looking (termed “point of regard”).  Eye-tracking is a popular measure in its own regard in research on reading, visual attention, marketing / advertising and psychiatric disorders such as schizophrenia.  We offer several types of eye-tracking solutions brought to you by Cambridge Research Systems Ltd., including high frame rate systems up to 500 frames/second, high-precision systems for use inside the fMRI scanner and affordable systems for simple fixation monitoring in behavioral and ERP applications.

System Integration

We provide integration assistance with the EEG systems we sell.  If you are buying an eye-tracker for stand-alone use, let us know your application so we can help you settle on the best fit.  If you intend to use the eye-tracker with a system you already own that we sell or support, let us know the serial number of the unit.  If you want the eye-tracker to be provided as part of a complete laboratory configuration, knowing some details about your application will let us guide you to the most convenient and cost-effective solution.

Other Ocular Monitoring Methods Not Considered Eye-Tracking

Note that there are other ways of measuring eye movements that do not provide enough information to determine point of regard, but those are listed elsewhere in the site.  For example, electrooculogram (EOG) can be measured with any DC bioamplifier, and it is often used to detect large movements away from a fixation point, but it is not generally considered suitable for determining point-of-regard.  Similarly, the Jazz Vigilance Monitor for use with ActiveTwo monitors ocular motility within the head/socket but due to viscoelasticity, the signal is not suitable for determining point-of-regard.  Jazz provides a very high frame rate and high sensitivity, which make it useful for microsaccade detection.

BlueGain

BlueGain

BlueGain biomedical amplifiers are a range of wirelessly connected amplifiers for directly measuring patient bio-potentials. BlueGainEOG has been configured to record electrooculograms (EOG) and communicate these signals via Bluetooth to a host computer, performing the minimum amount of processing. An infrared sensor allows data to be synchronised with external events. Electrooculography is an electrical method of recording eye movements. Tiny electrodes are attached to the skin at the inner and outer corners of the eye, and as the eye moves an alteration in the potential between these electrodes is recorded. The size of this potential at rest also gives an indication of the health of the retina. The recording itself is called an electrooculogram (EOG). In some situations it can be difficult to accurately tie external event indicators to the recorded analog data stream particularly when a stimulus generator and the recording device are operated independently. To help with this, BlueGain implements a separate infra red marker channel that operates without destroying the benefits of wireless communication. A supplementary unit connected to the stimulator generates infra-red pulses that are received by a sensor located on the front of the BlueGain unit and recorded as events directly into the data stream with a resolution of 100µs. Each data point in the BlueGain system is stamped with its sample time so that the host computer can verify the integrity of the data stream. A 3 second on-board memory provides temporary buffering in the event that data transmission is delayed by the host computer thereby ensuring that data will only be lost in exceptional circumstances. Battery life is extended by an auto power down feature that turns the system off after data transmission has been completed. Each of the analog input channels is amplified by a high quality instrumentation amplifier before being simultaneously sampled and digitised with 16bit resolution at 10kHz. BlueGain's flexible signal processing scheme means that all large blocking capacitors and other unreliable discrete elements have been completely removed from the signal path resulting in even better fidelity. The high intrinsic over sampling rate of the ADCs allows multiple samples to be accumulated before transmission to the host computer giving a further two bits of signal resolution. In the BlueGain philosophy, the analog signals are amplified then digitised directly within the range DC to the maximum pass frequency of the system. All subsequent signal processing such as DC removal and 30Hz low pass filtering is performed digitally by the host computer. This means that you are completely in control and never stuck with incorrect algorithms or the wrong frequency response. BlueGainEOG works with the minimum amount of disruption to a subject’s natural behavior. The wireless set up and arm band give complete freedom of movement without distraction. BlueGainEOG uses a wireless Bluetooth connection to galvanically isolate the subject, along with touch proof electrode connections ensuring the device is completely safe to use for research.
LiveTrack

LiveTrack

LiveTrack is a broad line of eye trackers for research applications made by Cambridge Research Systems.  The range includes:

  • LiveTrack Lightning, the newest addition - a competitively-priced unit for high-speed 500 Hz tracking in the laboratory or in the scanner
  • LiveTrack AV, a modestly-priced eye-tracking system for 60 Hz point of gaze monitoring inside the scanner
  • LiveTrack FM, a modestly-priced eye-tracking unit recommended for 60 Hz point of gaze monitoring
Related accessories

Related accessories

Here you will find accessories related to eye-tracking, such as head/chin rests and triggering cables.  If you are searching for an accessory that you do not find here, let us know.  We will find a source, offer it at a fair price, and bundle it with your complete order.