. Blocking tears with Isaac's head does not damage Isaac. His tears still originate from his head, so the line of fire is no longer constant while standing still.
+1 damage.
-1 tear delay (increased rate of fire)
Since this directly affects tear delay instead of changing the tears stat, it allows Isaac's rate of fire to go over the normal maximum rate.
Tear delay decreases are only noticeable when the tears stat is high.
The head orbital deals 7 damage per tick or 105 damage per second.