The Black Lens is dropped from Demon Eyes. The only thing that Black Lenses can be used for is to make Sunglasses. Black lenses have a 1% drop chance (1:100 chance).
■Black Lenses cannot be used for the same recipes as Lenses.
■They look like/are a black version of the Lens.
■Two of these are used to make sunglasses.
■They are rare drops from Demon Eyes ONLY. There's no other way to obtain them legitimately.
■The best way to obtain them is to hunt Demon Eyes on a Blood Moon
■Added to the game.