The perceived stability of fixation.
Despite the small eye movements, we perceive a stable visual world and a relatively fixed fixation within that stable world. This study demonstrates a method by which we can be made aware of instability of the direction of fixation and it is also shown that we do not have a fixation "point," but rather a fixation "area." Analysis of the results shows why we are normally unaware of the magnitude of our small eye movements.
D005133:Eye Movements; D005403:Fixation, Ocular; D006801:Humans; D014787:Vision Tests / Q000295:instrumentation / Q000379:methods