Blind Eye

Blind Eye is a tier 1 perk which appears in Call of Duty: Modern Warfare 3.

Overview
The perk grants immunity to air support and sentry turrets, infrared sights, recon drones as well as assault robots. This means that a player will not be actively shot at and pursued by autonomous air support like the Attack Helicopter. This perk also causes the user to lack a "glow", nor are they highlighted by a red box, in the thermal vision of player-controlled items such as Predator Missiles or Remote Sentries. However, one can still be targeted by the player controlling the item, even with this perk, and getting too close to a player without Blind Eye will kill the user due to collateral damage.

The Pro version is unlocked by destroying 40 air support items of any type, including sentry guns. Blind Eye Pro essentially halves launchers lock on time, and it also increases the damage that the user's bullets do to air support by about 60%, making it a perfect perk for an anti-aircraft/stealth custom class. However, Blind Eye Pro does not affect the Javelin's ground lock ability. Also note SAM Turret vehicle kills do not count towards achieving Blind Eye pro, mainly because they can't kill any players.

Trivia

 * The perk takes it's name from the idiom "turning a blind eye" meaning to ignore facts or activities, thus air support and sentries will "ignore" the player with the perk equipped.