Presenting visual dispersion for user looking at display for long time

A system is configured to: determine whether a user has gazed a display (15) for longer than a predefined time period; determining a first position of a device (14) comprising a display; determining a second position of the plurality of further devices (31-33); selecting a further device from a plurality of further devices based on the first location and the second location (32); and if it is determined that the user has gazed the display for longer than the predefined time period, controlling the selected further device to present the visual dispersion. 一种系统被配置为：确定用户是否已经注视显示器(15)长于预定义时间段；确定包括显示器的设备(14)的第一位置；确定多个另外的设备(31-33)的第二位置；基于第一位置和第二位置从多个另外的设备中选择另外的设备(32)；以及如果确定用户已经注视显示器长于预定义时间段，则控制所选择的另外的设备呈现视觉分散。