Night Vision Goggles

In Call of Duty 4
Night Vision Goggles are available to the player to activate in many levels in Campaign Mode, and are always available in Multiplayer.

In Campaign mode, they cam be used in conjunction with the laser sight, to see a clearer path of the path the bullet will take, which can help with accuracy in some situations.

Night Vision is also available in Multiplayer, but because there are almost no areas where it is needed, the Night Vision function is rarely used.