With chakra, the user connects an eye made of sand or Gold Dust to their optic nerve, which enables them to know what happens in the artificial eye's field of vision, this is genuinely a third eye for its user.
oh good pointIt wouldn't affect his third eye itself since it's a mere object, but Gaara/4th Kazekage himself yes, because the third eye is connected to his optical nerves and genjutsu affect someone thru their nerves
Pretty much this^It wouldn't affect his third eye itself since it's a mere object, but Gaara/4th Kazekage himself yes, because the third eye is connected to his optical nerves and genjutsu affect someone thru their nerves
this...I believe databook says the eye and gaara's nerves are connected, Considering genjutsu affects the nerves, yes