为解决虚拟环境造成沉浸者不适之问题，提出了满足视觉生理要求和较完善的虚拟环境视觉系统设计方案，即基于视觉内部机理和基于外部硬件新技术的两种方案，根据对虚拟环境的研究需要，在基于视觉机理的解决方案中，首次提出了明视深度这一新术语，并详细阐述了明视深度的概念、原理及测量方法，。从而为有效地避免头晕、眼胀等不良反应进行的视觉系统设计，增加了新的理论依据，在基于硬件技术的解决方案中，还结合眼球跟踪系统，液晶微电脑眼镜等新技术，分析了其应用原理及优缺点，最后讨论了人类视觉的自适应能力。

Virtual environmen(VE) is always involved in some visual deficit. In order to avoid causing visual problem by VE, two approaches for design of display system are presented, which are based separately on the inner mechanism of vision and on new technique of system hardware. In the first approach, for further study on VE, a new term named“the depth of field in vision”, which is the max scenes depth imaging clearly on retina when the eye status mainly for vergence and accommodation is fixed, is presented for the first time and is illustrated detailedly with its concept, principle and measurement method. This offers a new theory infrastructure for display system design to make immersion more comfortable against dizziness, eyestrain etc. In the second approach, the principle, application as well as their advantage or disadvantage of some new techniques in VE such as eye tracking system, liquid crystal glasses with microcomputer are analyzed. The adaptive capability of human vision is also concerned at the end of the paper.