These crystal lenses fit over the eyes. While wearing them, your vision improves significantly out to a range of 1 foot, granting you Darkvision within that range and Advantage on Intelligence (Investigation) checks made to examine something within that range.

These crystal lenses fit over the eyes. While wearing them, you can see much better than normal out to a range of 1 foot. You have advantage on Intelligence (Investigation) checks that rely on sight while searching an area or studying an object within that range.