reason optical and perceptual puzzles can be more memorable than ordinary search games.
After the hidden figure has been recognized, returning completely to the original interpretation can become difficult. The viewer already knows which branches and shadows belong together in the second pattern. Instead of seeing several unrelated pieces of forest, the mind continues grouping those elements into the newly discovered face. The same visual information is still present, but previous recognition influences what becomes noticeable next.
This does not mean the viewer has discovered an image that was physically
