This occurs as a consequence of any visual continuity disruption that happens simultaneously with the changes in the scene. These disruptions can be an eye saccade, a shift of the picture, a brief flicker of the eyelids or even an eye blink. 

The phenomenon of change blindness was noticed for the first time by George McConkie and his colleagues in the 1970s. But, it was Ronald Rensink who had introduced the term ‘change blindness’ in 1997. According to experts, it is indeed possible to create change blindness when changes made in the visual field are brought in either gradually, flickered in and out, or else brought in abruptly for a very short duration of time at different time intervals. In fact, experiments conducted by psychologists and researchers have revealed that change blindness can be caused in an individual by making changes in the image in 13 seconds or longer.

There are various interactive ways in which change blindness can be demonstrated. One way is through motion picture or a video where actors continue to interact with the viewers. However, the changes made behind or around the actor go unnoticed by the observers since they are concentrating on listening to the actor. In another experiment it has been shown that a person is talking to a person behind the counter. Suddenly, the person’s attention is deviated for a few milliseconds.

The person behind the counter is replaced by another and this change goes unnoticed. Ronald Rensink had, in fact, popularized the “flicker” technique. In this, two images of scenes alternate repeatedly with a brief time interval of 80 milliseconds between each image change, thereby providing a flickering experience. However, these changes go unnoticed by the observer.

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