first of all, you're totally abusing vocabulary here. an "event horizon" is the radius from the center of a black hole at which the gravitational force is so strong, and space so curved by it, that light cannot pass by the hole at this point; it is curved into the hole and cannot escape.
if you think that has something to do with the horizon of a persons visual field.. ???
what, is the earth peppered with black holes? lol, other flat earth cultists try to tell me that gravity doesn't even exist. because their model makes wild predictions about gravity ((easily testable)) that in no way whatsoever line up with reality. but that's another conversation.