Simply by asking the subject to read the text silently, we can understand the true intentions of the subject. This example is the result of a measurement based on the identification of an airport violation. It shows where the pupil enlarges in response to the content of the text while it is being read silently, and the level of response. With our technology, the violation itself can be identified, regardless of the content. In a survey of 74 subjects, 64% of the violations were identified, and 78% of the Japanese subjects were measured in Japanese.