美国科学家的一项研究表明，人类视觉系统能借助物体与水平视线的夹角来判断距离远近。这一研究成果可以帮助人们改进虚拟现实系统和机器人技术。同时，也能解决某些视力缺陷者的问题。科学家在近日出版的英国《自然》杂志上报告说，他们让志愿被测试者戴上特制的棱镜，这种棱 A study by American scientists shows that the human visual system can determine the distance by using the angle between the object and horizontal line of sight. This research can help people improve virtual reality systems and robotics. At the same time, it can also solve the problems of some people who have vision problems. Scientists in the recently published British “Nature” magazine reported that they volunteer subjects to wear special prism, this kind of edge