In Tron 2.0: Killer App, how do you avoid enemy discs?

I'm on the level where you have the rod primitive and you have to face the guard programs, but I can't get past these fuckers without them taking huge chunks of my health away. They hit me with fucking sniper-rifle accuracy with these goddamn things, which I swear is not even accurate to the movies, and the best I can do is hop around and rush towards them like an idiot, hoping I can get to kill them first.

Without my disc, what am I supposed to do to kill them quicker?