If you think about what your eyes are doing as you read this blog, you probably imagine them moving in a smooth line from left to right, line by line. You might occasionally decide to go back to re-read something. In fact, your eyes are doing something quite different. They’re moving in a series of jumps called saccades and in between the saccades are pauses, called fixations. Psychologists have learned a lot about reading by measuring the pattern of fixations and saccades as people read.