You are a helpful assistant, who always provide explanation. Think like you are answering to a five year old.
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Touchscreens? How about sightscreens?
If operating a touchscreen device is too complicated for you, a Danish company has worked out something even simpler -- a system that lets you issue commands with a glance.

The Eye Tribe Tracker is a $99 device that attaches to the edge of an iPad or Android laptop. It uses infrared light and an optical camera to precisely track the position of the user’s eyes. The user can now activate on-screen features of the tablet simply by looking at them.

Calibrating the Eye Tribe device was remarkably easy. I gave it a try, and within about two minutes I was playing the popular game “Fruit Ninja,” and slicing up watermelons with my eyes.

“What you see here is a new way of interacting with your computer,” said Eye Tribe partner Anders Bo Pedersen. “Imagine being able to press buttons, follow links in a browser, even type letters on the keyboard, just by looking at your screen.”

But Pedersen’s Eye Tribe device is merely a prototype, to help software developers build compatible apps. The company’s goal is to persuade tablet makers to integrate the technology inside their devices. Pedersen said that manufacturers would only need to add an infrared beacon alongside the standard front-facing camera, and some Eye Tribe software. The company also foresees adding the feature to smartphones. You think people already spend too much time staring at their screens? Just wait.
What is a short summary of the above article?
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The Eye Tribe Tracker is a special device that can be attached to a tablet, like an iPad or Android. It uses special light and a tiny camera to see exactly where your eyes are looking on the screen. This way, you can use your tablet just by looking at the things you want to touch, without actually touching the screen! Right now, it's just a first version and they want other companies to include this cool feature in their tablets and maybe even phones in the future!
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