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.
RollQuest ships the D&D 2024 SRD as a content pack, on a 5e character sheet that does the maths - roll from the sheet and let the numbers work themselves out. Free to start.