In virtual reality (VR), users can experience symptoms of motion sickness, which is referred to as VR sickness or cybersickness. The symptoms include but are not limited to eye fatigue, disorientation, and nausea, which can impair the VR experience of users. Though many studies have attempted to reduce the discomfort, they produced conflicting results with varying degrees of VR sickness. In particular, a visually improved VR does not necessarily result in decreased VR sickness. To understand these unexpected results, we surveyed the causes of VR sickness and measurement of symptoms. We reorganized the causes of the VR sickness into three major factors (hardware, content, and human factors) and investigated the sub-component of each factor. We then surveyed frequently used measures of VR sickness, both subjective and objective approaches. We also investigated emerging approaches for reducing VR sickness and proposed a multimodal fidelity hypothesis to give an insight into future studies.

在虚拟现实（VR）中，用户可能会遇到晕车的症状，这被称为VR晕车或计算机疾病。症状包括但不限于眼睛疲劳，迷失方向和恶心，这可能会损害用户的VR体验。尽管许多研究试图减轻不适感，但它们在不同程度的VR疾病中产生了矛盾的结果。特别是，视觉上改善的VR不一定会导致VR疾病减少。为了了解这些意外结果，我们调查了VR疾病的原因和症状的测量。我们将VR疾病的原因重组为三个主要因素（硬件，内容和人为因素），并研究了每个因素的子组成部分。然后，我们调查了VR疾病的常用测量方法，包括主观方法和客观方法。