Well it should come with a sort of USB. Plug the USB into the front of the PS3 and go through the opening screen on your PS3 until you find it. Then you can do video chats, and play games you can't normally play. You can buy these games on the Play Station Store.
With the eye, you can play certain current and future interactive games. The key features of the PLAYSTATION Eye include:
-A microphone with the ability to reduce background noise and focus on spoken word for smoother, more accurate speech recognition -Faster frame rate for improved tracking, responsiveness and smoothness -Two position zoom lens for close-up and full body options -Free EyeCreate™ editing software, which allows users to save, edit and add cool visual effects to photos, video audio clips and more! -EyeCreate also enables user to capture videos and audio clips directly to your PS3’s hard disk drive and you can access a variety of motion capturing video modes.
PS3 eye can be found in many auctions across ebay, even in our ebay store!