Optical Illusions – Tricks Of The Eye And The Mind

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Optical Illusions

Visual perception cannot always be trusted.

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This is possibly one of the most uncanny optical illusions in existence. No matter how hard you look, you may not be able to convince yourself that the two squares are the identical shade of grey.

To check, try one of these methods:
Right click the large picture, save it to your hard drive, put it into your image editor, “select” square A and then pull it down onto square B. There will be an exact match in colour!
Perhaps even easier than the above, if you place your finger covering the two to three squares that separate A and B, it can clearly be seen that they are the same color. In other words, forcefully ignoring the borders between the squares.

Perception

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- Amodal perception is the term used to describe the full perception of a physical structure when it is only partially perceived. For example, a table will be perceived as a complete volumetric structure even if only part of it is visible; the internal volumes and hidden rear surfaces are perceived despite the fact that only the near surfaces are exposed to view.

- Color perception -

- Depth perception is the visual ability to perceive the world in three dimensions. It is a trait common to many higher animals. Depth perception allows the beholder to accurately gauge the distance to an object.

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