Well first of all, don't hold off on blinking. And even if you feel like blinking is a nuisance, do it on purpose, to keep your eyes watered. The results of not blinking enough will be an enforced closing of the eyes, tears streaming down the face and a runny nose.

Now, about the pulsing, it is extremely regular phenomena, as you are gaining access concentration. It is creepy the first few times, that's for sure. Do carry on, things like that are a sign of progress!