|The following is based on Fallout 3 cut content and has not been confirmed by canon sources.|
The Peepers are an armor item that was cut from the final version of the Fallout 3 add-on Operation: Anchorage.
They are identical in appearance to the biker goggles. They provide a Damage Resistance of 1 as well as a scripted night vision effect.
They are located in the "TestPhil" cell along with many other cut items.
The Peepers were cut from the Fallout 3 add-on Operation: Anchorage.
This shows The Peepers in use, demonstrating the most likely reason that they were cut from Operation: Anchorage.