Jaschinski-Kruza W
Institut für Arbeitsphysiologie, Dortmund, Germany.
Hum Factors. 1991 Feb;33(1):69-83. doi: 10.1177/001872089103300106.
Without fixation stimuli--for instance, in darkness--accommodation and convergence of the eyes reach an intermediate state that is relatively stable within a subject but which ranges from about 30 cm to infinity across subjects. This study investigated whether these oculomotor positions in darkness are related to visual strain. During work at a visual display unit (VDU), visual strain at a viewing distance of 50 cm was stronger than at 100 cm (with characters twice as large). The more distant the individual's dark convergence, the greater was the visual strain at the 50-cm viewing distance. When subjects were free to adjust the viewing distance to their comfort level, they chose distances between 51 and 99 cm (mean 74 cm) with characters 5 mm tall.
在没有固定刺激的情况下——例如，在黑暗中——眼睛的调节和集合会达到一种中间状态，这种状态在个体内部相对稳定，但在不同个体之间范围从大约30厘米到无限远。本研究调查了黑暗中的这些眼球运动位置是否与视觉疲劳有关。在视觉显示单元（VDU）工作期间，50厘米观看距离处的视觉疲劳比100厘米处更强（字符大小为两倍）。个体的暗集合距离越远，50厘米观看距离处的视觉疲劳就越大。当受试者可以自由将观看距离调整到舒适水平时，他们选择了51至99厘米（平均74厘米）之间的距离，字符高度为5毫米。
