TVi video magnifier offers up to 18x the magnification

TVi is a compact video magnifier that plugs into a TV and can be moved mouse-like over text to enable viewing of an enlarged version of the text on the screen. With the device, images can be projected in color, black on white, or white on black.

TVi works via a camera located in the bottom of the device. This design makes it suitable for other magnifying tasks as well, because the camera can be pointed at the object to be viewed.