To add a bit information to Klaus' comments: We also have the SR Eyelink system at the Brain Research Unit of Aalto University. It is used together with Elekta Neuromag Vectoriview. - Our noise measurements revealed no artefacts with distances larger than 80 cm. - Measurement is possible monocular (up to 2k) and binocular (up to 1k). - The ExperimentBuilder software provides easy ways to program MEG experiments - once the connection between eyetracker and MEG is established. Additionally, you get immediate and excellent support. - Setup and calibration of the system is easy and takes approximately 5-10 minutes (can be less with expertise). - No problems with glasses (tested up to +/-5 dpt); glasses are preferred as visual aids, contact lenses sometimes cause troubles. My background is in eye tracking and I am familar with SR systems for a long time. But also other colleagues in the lab are enthusiastic about the system, the software and the usability. Hope this helps - please feel free to ask if there are more specific questions. All the very best, Sebastian -- Dr. Sebastian Pannasch Brain Research Unit Low Temperature Laboratory Aalto University School of Science and Technology P.O. Box 15100, FI-00076 AALTO, Finland https://ltl.tkk.fi/wiki/Sebastian_Pannasch