The article concentrated on the possible neurophysiological mechanisms of an insight effect. We explore the idea that insight appearance is poetic metaphor of ordinary psychophysics threshold level description. To measure the simplest and traditional form of insight we propose to use incomplete figure test. We consider the neurophysiological principles of holistic manner under the recognition of the fragmented images of the objects, and eye movement importance. For explanation the data we use traditional multilevel visual information processing model, provided comprising the input signal after preprocessing and description from the memory store.