Cryptochromatic spectacles

The  are a piece of headwear added to Fallout 3 in the Point Lookout add-on.

They provide a damage resistance of 1 and can be repaired with Glasses, as well as Doctor Li's Glasses and Three Dog's Glasses.

Obtaining
The Cryptochromatic Spectacles are found in the toilet tank in the Homestead Motel's room 1D.
 * Note: They will be removed from you if you attempt to leave before you finish the quest they are needed for. They will be returned to you upon your return to Point Lookout though.

Related quest: The Velvet Curtain
The spectacles are used to see hidden color rings during the quest The Velvet Curtain and access the Chinese extraction bunker.

Appearances
appear only in the Fallout 3 add-on Point Lookout.

Bugs
If you have these glasses in your inventory when you begin the Operation: Anchorage simulation they will still be in your inventory during the simulation. "Confirmed on 360"