What is Eye Tracking?

Eye tracking means figuring out the movement of eye as a person is looking at something. Video-based eye tracking devices observe a person's pupil to determine the direction of their gaze. Eye-tracking can be used for input, by directly controlling a pointer on the screen, or even for communicating the gaze direction to a co-worker looking at the same document (much like a telepointer). Eye-tracking can also be used to study how user interfaces are being used and may give insight into screen layout issues and how users are performing their tasks. Note: Eye Tracking can also refer to the ability of the eyes to smoothly and effortlessly follow a moving target (in vision research).

The following researched graphs show the difference between male and female eye tracking.

Source:http://www.eye-square.com/documents/EyeTracking-ResearchApplications.pdf From the source above usability testing was conducted to see the difference patterns between male and female.

As you can see in graph 1 the focus time spent by a female for texture information is far greater then a male. The male tend to focus more time on pictures.
Graph 2 shows how both male and female rate information. Females believe images are more important yet their focus eye tracking is fixed on text and male believe text is more important yet their focused eye tracking is fixed on images.