Current gaze input methods for VR headsets predominantly utilize the gaze ray as a pointing cursor, often neglecting depth information in it. This study introduces FocusFlow, a novel gaze interaction technique that integrates focal depth into gaze input dimensions, facilitating users to actively shift their focus along the depth dimension for interaction. A detection algorithm to identify the user's focal depth is developed. Based on this, a layer-based UI is proposed, which uses focal depth changes to enable layer switch operations, offering an intuitive hands-free selection method. We also designed visual cues to guide users to adjust focal depth accurately and get familiar with the interaction process. Preliminary evaluations demonstrate the system's usability, and several potential applications are discussed. Through FocusFlow, we aim to enrich the input dimensions of gaze interaction, achieving more intuitive and efficient human-computer interactions on headset devices.

翻译：摘要：当前用于VR头戴式显示器的注视输入方法主要将注视射线用作指向光标，常忽略其中的深度信息。本研究提出FocusFlow，一种新型注视交互技术，它将焦深整合至注视输入维度中，使用户能够主动沿深度维度转移焦点进行交互。我们开发了一种检测算法来识别用户的焦深。基于此，提出了一种基于层的用户界面，利用焦深变化实现层切换操作，提供一种直观的无手选择方法。我们还设计了视觉提示来引导用户精确调整焦深并熟悉交互过程。初步评估证明了该系统的可用性，并讨论了几种潜在应用。通过FocusFlow，我们旨在丰富注视交互的输入维度，实现头戴式设备上更直观、更高效的人机交互。