Vizmanos Juan G, de la Fuente Isabel, Matesanz Beatriz M, Aparicio Juan A
Dpto de Optica y Física Aplicada, Universidad de Valladolid, P. Prado de la Magdalena s/n 47071, Valladolid, Spain.
Ophthalmic Physiol Opt. 2004 Sep;24(5):464-8. doi: 10.1111/j.1475-1313.2004.00230.x.
Lighting plays a major role in contrast sensitivity (CS) measurements. Both the test and surround illumination influence the results although they are not usually considered in clinical practice. The effects of test luminance are well known, but the influence of surround luminance seems to be less investigated. This study aims to evaluate the differences in CS measured with two configurations of surround illumination typical of clinical practice; and to analyse the influence of the angular size of the target on pupil diameter for both surround luminances. An experimental arrangement was designed to measure CS with controlled illumination of both test and surround. An infrared pupillometer was also used to measure steady pupil size. A statistically significant increase of CS and a decrease of pupil size with higher surround illumination were found.
照明在对比敏感度（CS）测量中起着重要作用。尽管在临床实践中通常不考虑测试光和周围环境光，但它们都会影响测量结果。测试亮度的影响是众所周知的，但周围环境亮度的影响似乎较少被研究。本研究旨在评估在临床实践中两种典型的周围环境照明配置下测量的对比敏感度差异；并分析两种周围环境亮度下目标物视角大小对瞳孔直径的影响。设计了一种实验装置，用于在测试光和周围环境光可控的条件下测量对比敏感度。还使用了红外瞳孔计来测量稳定状态下的瞳孔大小。结果发现，随着周围环境照明亮度的增加，对比敏感度显著提高，瞳孔大小减小。
