These uncommon magical items are a boon to monarchs and assassins everywhere. The spectacles allow the user to detect poison in food and drink and even identify what manner of poison it is.
A character wearing the spectacles can sense the presence of poisons within 30 feet. You also identify the kind of poison it is by making an Intelligence check equal to the save DC of the poison.
The spectacles can penetrate most barriers, but it is blocked by 1 foot of stone, 1 inch of common metal, a thin sheet of lead, or 3 feet of wood or dirt.