Efficient measurements for the dynamic range of human lightness perception-猫眼课题宝

有效测量人体明度感知的动态范围

DOI：

10.1007/s10384-020-00808-2

发表时间：

2021

期刊：

Japanese Journal of Ophthalmology

影响因子：

2.4

通讯作者：

中科院分区：

医学4区

文献类型：

作者：

Horiguchi Hiroshi;Suzuki Eiji;Kubo Hiroyuki;Fujikado Takashi;Asonuma Sanae;Fujimoto Chihomi;Tatsumoto Muneto;Fukuchi Takeo;Sakaue Yuta;Ichimura Mika;Kurimoto Yasuo;Yamamoto Midori;Nakadomari Satoshi

目的眼病患者常表现为夜盲、偏盲和/或视物恐怖。我们假设这些症状与影响亮度感知（DRL）动态范围的疾病有关。然而，目前还没有标准化的方法来测量临床使用的DRL。我们开发了一种有效的测量方法来估计DRL。研究设计临床试验方法55例患有眼病的糖尿病患者和46例对照参与。每个被试判断视觉刺激的外观，在均匀的背景上显示一个亮度从最大值逐渐变化到最小值的粗条。在不同的试验中，背景亮度在三个级别之间伪随机变化。受试者反复敲击条形图上的边界，该边界将浅灰色白色/黑色和完美的白色/黑色区分开来。我们定义的DRL之间的灰度和白色/black.ResultsThe平均DRL的患者之间的边界的抽头点的亮度值的比率约为15 dB，显着小于对照组（20 dB）。每个患者的DRL偏移的中心取决于背景亮度，我们称之为上下文敏感性指数（iCS），显着大于对照组。视网膜色素变性患者在各种光照条件下的DRL均小于对照组。只有iCS青光眼显着大于controls.ConclusionsThis测量技术检测DRL的异常。结果支持我们的假设，即DRL异常的特点轻相关的症状，可能阐明夜盲症，hemeralopia，和恐惧症的原因。

PurposePatients with an eye disease often report nyctalopia, hemianopia, and/or photophobia. We hypothesized that such symptoms are related to the disease impacting the dynamic range of lightness perception (DRL). However, there is currently no standardized approach for measuring DRL for clinical use. We developed an efficient measurement method to estimate DRL.Study designClinical trialMethodsFifty-five photophobic patients with eye disease and 46 controls participated. Each participant judged the appearance of visual stimuli, a thick bar with luminance that gradually changed from maximum to minimum was displayed on uniform background. On different trials the background luminance changed pseudo-randomly between three levels. The participants repeatedly tapped a border on the bar that divided the appearance of grayish white/black and perfect white/black. We defined the DRL as the ratio between the luminance values at the tapped point of the border between gray and white/black.ResultsThe mean DRL of the patients was approximately 15 dB, significantly smaller than that of the controls (20 dB). The center of each patient's DRL shift depending on background luminance, which we named index of contextual susceptibility (iCS), was significantly larger than controls. The DRL of retinitis pigmentosa was smaller than controls for every luminance condition. Only the iCS of glaucoma was significantly larger than controls.ConclusionsThis measurement technique detects an abnormality of the DRL. The results support our hypothesis that the DRL abnormality characterizes lightness-relevant symptoms that may elucidate the causes of nyctalopia, hemeralopia, and photophobia.