A person's vision falls in stressful situations. About it tell results of research. Scientists gathered a group of young volunteers aged 18-30 years and divided them into two groups. The first group looked at red dot and was received at this time an electric shock, the second considered the green dot and shock did not preach.
In the second phase, the volunteers were shown the squares with lines inside. It was necessary to determine the direction of the lines. And again, for the first group was created stressful conditions, and the second – normal.
Scientists have found that the presence of the stress factor changed human visual perception for the worse. The point became less prominent as the direction of the lines.