Based on what we know, we can confirm that this effect is often referred to as the Parallax effect.
This effect explains the differences that we see when performing this experiment with the pencil. It attempts to explain the difference in the apparent position that we see when viewing the pencil from differing lines of sight. This has to do with the change in the angle we are viewing from when we switch eyes.
Therefore, we can confirm that this effect is often referred to as the Parallax effect.
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