Make object disappear when you look at it

Several examples here:

Instead of stopping the object, hide it instead.

Hello, can someone explain to me how to make a blueprint actor that disappears after you looked at it, or his direction ?(like in a horror game)

Here

Image 1 shows the player blueprint tha I added an arrow to and scale it.

Image 2 show an Actor Blueprint that has a collision box and a cube to test, then then arrow collide with the collision box, it turn the box invisible

Forgot to add that the arrow is connected to the players camera