Handling a Trigger Pulse from A Stimulus Package

How do I handle a trigger pulse from a psychology experiment stimulus package like E-Prime, OpenSesame, or Psychopy with EyeTribe data. Biopac and similar psycho- physiology equipment will take a triggering input is there any similar way I can synch these pulses with EyeTribe data? {Sorry if this is a duplicate question but my earlier question seems to have been misplaced in the General Development category.}