Dead Eye gives an increasing damage multiplier based on how many consecutive hits you've landed. In a recent run I collected it along with 20/20 and Inner Eye, giving me 6 tears per shot total. I watched my shots carefully, but my damage modifier seemed to be resetting unpredictably.
What counts as a hit or a miss in this scenario? Is there a certain threshold for how many tears out of a single shot have to hit an enemy?