This paper proposes a new interactive flow visualization environment featured with an eye gaze interface. Gaze information is used to automatically adapt the display of flow field to the interest of users. We propose to use focus-plus-context techniques for effectively visualizing the local details together with the global context of large complex 2D flow fields in a gaze-directed way. Gaze-based interaction is also supported. Tracers can be automatically inserted at user’s gaze points. Since there are no necessity of using other input devices for interacting with the system except for observing the flow using their eyes, users are allowed to concentrate on the observing tasks and interact with the system in an easier, faster and more natural way.