Can eye move during the laser treatment?

At the time of eye laser treatment, can i move my eyes? 

You will be asked to look at a light under the laser. You are required to look steadily at the light throughout the operation. Since this keeps the eye centred under the laser. 

However, if you temporarily look away or lose the ability to look at the fixation light, do not be concerned. The WaveLight Concerto 500Hz laser is equipped with a special eye tracker that tracks the eye at 500 times a second throughout the eye treatment procedure.