The Authority glasses are a set of heavily tinted glasses in Fallout: New Vegas. They can be found commonly throughout the Mojave Wasteland. They are frequently worn by NCR Personnel.
Authority glasses are synonymous with New California Republic Rangers, having large reflective black lenses. They provide no damage threshold and no bonuses. They can be repaired with other pairs of themselves or any other type of glasses. The biggest difference from normal sunglasses is the fact they are always blackened out rather than requiring a bright light source to cause them to darken.
Located to the southeast of Nipton is the old nuclear test site and the Caesar's Legion safehouse. In between these two areas and northwest of the old nuclear test site is a small sandbag observation shelter where several sets can be found. There are five glasses in total on top of seats and some on the floor, but only two of them can be picked up. This implies they were being worn by people observing a nuclear explosion, though sunglasses would not prevent eye damage from viewing one directly.
A pair can be found in the mercenary camp north of the Horowitz Farmstead, along with the unique Gauss rifleYCS/186.
A pair may be found on a dead prospector in The Prospector's Den in the main area with a bench that you see upon first entering.
A pair can be found on a dead prospector near the hill located east-northeast of Goodsprings cemetery. (Found body but no glasses played on PS3)
PCPlayStation 3Xbox 360 The glasses shapes themselves to some degree after the wearer's face, which can sometimes result in them looking very distorted on certain non-player characters, especially Boone.
Xbox 360 They can sometimes cause the game to crash when equipped via a hotkey.