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. For instructions on the calibration procedure required to convert the arbitrary units to millimeters, see the support thread:

• How can I convert pupil size to mm?
  

For useful practical advice on recording and analyzing pupil data, watch the webinar:

• Recording and Analysing Pupil Data (Pupilometry)