In the room on the screen both eyes receive the same impression, and the result is that the consciousness of depth is inhibited.

But when a far distant landscape is the only background, the impression from the picture and life is indeed the same.

The trees or mountains which are several hundred feet distant from the eye give to both eyes exactly the same impression, inasmuch as the small difference of position between the two eyeballs has no influence compared with the distance of the objects from our face.

We would see the mountains with both eyes alike in reality, and therefore we feel unhampered in our subjective interpretation of far distant vision when the screen offers exactly the same picture of the mountains to our two eyes.

Hence in such cases we believe that we see the persons really in the foreground and the landscape far away.
_Nevertheless we are never deceived; we are fully conscious of the depth, and yet we do not take it for real depth._ Too much stands in the way.