Third Eye: Once an Infiltrator has reached level 20, she has become so aware of her surroundings that she can see all that happens within her normal vision range for a full 360 degrees around her. She can no longer be blind sighted, flanked, or fall victim to attacks of oppertunity. The Infiltrator may attempt an Attack of Oppertunity against those attempting an Attack of Oppertunity against her*. If she succeeds in a Reflex roll against the opponent, the opponent's Attack of Oppertunity becomes null. This ability does not come into effect if the Infiltrator is incapacitated in any way that prevents full body movement.
-*The same applies for flanking.