FAQ: I want to collect Pupil size data, is there anything special I need to do?

[Sam]

All EyeLink systems automatically record Pupil size data with every sample, and there are no additional steps required. Pupil size data is recorded in arbitrary units which can be converted to millimeters via a simple calibration procedure described in the following thread:

• How can I convert pupil size to mm?
  

This webinar also contains lots of useful practical advice:

• Recording and Analysing Pupil Data (Pupilometry)