1. A vision enhancement apparatus for a vision-impaired user, comprising an image processor arranged to: process high resolution video data representing images of a scene and display the resulting images to the user; automatically detect and track a user selected object in the images; and automatically modify the video data, by reserving a user selected area of the displayed images for displaying the tracked object as a separate video tile within the images of the scene to provide modified video data that includes: the displayed images of the scene that includes the tracked object; and the separate video tile, at the user selected area within the displayed images, to display the tracked object, wherein the tracked object remains displayed at the separate video tile despite movement of the user or the tracked object.