If the scene were a real room, every
detail in it would appear differently to the two eyes. 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. Some unfavorable conditions are still deficiencies of the
technique; for instance, the camera picture in some respects exaggerates
the distances. If we see through the open door of the rear wall into one
or two other rooms, they appear like a distant corridor.
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