Geib T, Baumann C
Physiologisches Institut, Justus-Liebig-Universität, Giessen, Federal Republic of Germany.
Graefes Arch Clin Exp Ophthalmol. 1990;228(4):310-5. doi: 10.1007/BF00920053.
The threshold of binocular depth perception was measured in 11 healthy volunteers. A three-rod arrangement was employed in which both the luminance of the rods and that of the adapting field could be adjusted independently. This allowed fixing the contrast when the effect of luminance was studied or fixing the luminance when the effect of contrast was investigated. The observation distance was 400 mm. Thresholds were expressed as angular disparities and were based on 75% correct responses. Points of subjective equality were also determined. Lowest thresholds (2.85 +/- 0.67 s of arc) were found for a moderate contrast of 0.5 whereas low (0.05) and high (0.95) contrast both produced significantly higher thresholds (luminance 250 cd/m2). Altering the field luminance (50, 250, 1600 cd/m2) under constant contrast conditions (0.95) did not measurably influence stereoscopic acuity.
对11名健康志愿者的双眼深度感知阈值进行了测量。采用了一种三杆装置，其中杆的亮度和适应场的亮度均可独立调节。这使得在研究亮度效应时可以固定对比度，或者在研究对比度效应时可以固定亮度。观察距离为400毫米。阈值以角视差表示，基于75%的正确反应。还确定了主观相等点。对于0.5的中等对比度，发现最低阈值（2.85±0.67角秒），而低对比度（0.05）和高对比度（0.95）均产生显著更高的阈值（亮度250 cd/m²）。在恒定对比度条件（0.95）下改变场亮度（50、250、1600 cd/m²）对立体视敏度没有明显影响。
