Young R S, Kimura E, Delucia P R
Department of Ophthalmology and Visual Sciences, Texas Tech University Health Sciences Center, Lubbock 79430-0001, USA.
Vision Res. 1995 Aug;35(15):2235-41. doi: 10.1016/0042-6989(94)00303-3.
While not easily fit into the classic descriptions of the pupillary light reflex, previous studies reported that changes in the spatial composition of the retinal image can evoke a pupillary response. The present study extends this observation by showing that the pupil constricts in response to scotopic as well as photopic spatial patterns. Moreover, the amplitude of the scotopic response decreases with increasing spatial frequencies suggesting a pupillary spatial acuity of about 3 c/deg. The scotopic pupil acuity is similar to the scotopic perceptual visual acuity measured in the same observers.
虽然视网膜图像空间组成的变化引发的瞳孔反应不易符合瞳孔对光反射的经典描述，但先前的研究报告过这一现象。本研究扩展了这一观察结果，表明瞳孔会对暗视以及明视空间模式作出收缩反应。此外，暗视反应的幅度会随着空间频率的增加而降低，这表明瞳孔的空间视敏度约为3周/度。暗视瞳孔视敏度与在相同观察者身上测得的暗视感知视敏度相似。
