Finally we are going to talk quickly about the category of head-mounted projecting displays. These are interesting devices in the sense that they allow direct combination of real images and the computer stored images or any other information that you have. What is happening here is that you source of an image that you want to overlay or you want to see directly in the real world. For example, you see here a combination of two things. So information is coming from here and it gets back. But then there is a virtual reflected screen which sends it back in this direction, so the eye here sitting here sees this information, but it also sees what is coming from here. So, you get a combination of both direct and the stored information.

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