Just plain interesting. An undergraduate student working on some research discovered a strange tendency in the way our eyes process images when our focus is trained on the center of two images. It appears the two hemispheres of our brain transpose some of the information and distort what appears in our peripherals. It is what I am calling the "reverse beer goggles effect".
Here's how Matthew Thompson, the publisher of the finding, describes what he calls, the "Flashed Face Distortion Effect":
Like many interesting scientific discoveries, this one was an accident. Sean Murphy, an undergraduate student, was working alone in the lab on a set of faces for one of his experiments. He aligned a set of faces at the eyes and started to skim through them. After a few seconds, he noticed that some of the faces began to appear highly deformed and grotesque. He looked at the especially ugly faces individually, but each of them appeared normal or even attractive. We called it the “Flashed Face Distortion Effect” and wanted to share it with the world, so we put it on YouTube.
The effect seems to depend on processing each face in light of the others. By aligning the faces at the eyes and presenting them quickly, it becomes much easier to compare them, so the differences between the faces are more extreme. If someone has a large jaw, it looks almost ogre-like. If they have an especially large forehead, then it looks particularly bulbous. We’re conducting several experiments right now to figure out exactly what’s causing this effect, so watch this space!
Take a look: