If you believe the rumors, the successor to the Samsung Galaxy S3 (pictured) could scroll up and down based on your eye movements.(Credit:Josh Miller/CNET)If the Samsung Galaxy S4 rumors pan out, Samsung’s newest smartphone may let people interact with the screen using just their eyes. Join CNET on Thursday, March 14 at 3 p.m. PT / 6 p.m. ET for live coverage of the Samsung Galaxy S4 eventEye-tracking uses the camera to lock onto the motion of a user’s peepers, following wherever they move. With it, the phone can perceive where the user is looking, and can respond to a set of behaviors, let’s say a very intentional movement to scroll a Web page up and down, or a long, purposeful blink to click.If your eyes have reached the bottom of a page, eye-tracking software could automatically scroll you down the following paragraphs of text.This type of technology – which had been researched for desktop computing long before it was conceived of for the smaller smartphone screen – has been demoed for a variety of actions: zooming in or out, pausing a video by looking away from a screen, and playing games. One company, Umoove, has already posted a demo video on how different eye-tracking navigation could work (below).