Blind Eye= Scorestreaks controlled by Artificial Intelligence cannot target you.
Ghost= Immune to UAV while moving, planting or defusing a bomb, and controlling scorestreaks.
Cold-Blooded= Immune to Target Finder, Sensor Grenade, MMS, other attachments that can see you, and you don't show up as a big fat red diamond for player controlled killstreaks such as Hellfire, VTOL Warship, etc.
Hope is what makes us strong. It is what we fight with when all else is lost.