The Eye Tribe

Is there a function governing the tracking of pupil's dilation dilation and how it is measured... The task I would like to do is to know if either the user has dilated his/her pupil or not. Do you have any idea how can this be done? Thanks and Sorry for this noob question it's because I am just new to this wonderful technology Hope someone could help. Many thanks.

According to the API, you get pupil size as part of the frame object once the system is calibrated. Have a look at the open source C# samples for an example of how this is done.