本研究探討使用導航時，單眼近眼顯示器 (NED)位置對安全的影響。九位受試者進行四種位置的導航螢幕 (三種顯示在單眼近眼顯示器上和一種是顯示在投影螢幕上) 與各方向的數量 (少、 中、 多三種水準) 。 任務為隨機的2D 迷宮。臨界閃爍頻率 (CFF)、 眨眼頻率、 主觀評量和 Tobii 眼球跟蹤程式的數據 (掃視時間和眼球移動速度) 都被記錄並用來評估視覺疲勞。結果顯示在短暫地使用導航中，單眼近眼顯示器相對安全。最後，對在眼睛前方的導航任務短期使用單眼NED的，右上角位置可能比下面位置疲勞少。

The present study investigated monocular Near-to-Eye Display (NED) position for the navigation task. Nine subjects performed four navigation display positions (three on monocular NED and one on the screen projector display) with three differences in the number of directions (low, medium, and high). The tasks were randomized 2D maze. The Critical Flicker Frequency (CFF), blink rate, subjective rating, and Tobii eye tracker data (saccades and eye movement velocity) were recorded to assess visual fatigue. The results showed that the blink rate, saccades rate and eye movement velocity sensitive in the positions variable for navigation task. In conclusion, for short-term use of monocular NED on the navigation task in front of the eyes, the top-right position might be less fatigue than the below position.

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