Bek T, Skovsen S F
Department of Ophthalmology, Arhus University Hospital, Denmark.
Graefes Arch Clin Exp Ophthalmol. 1995 May;233(5):261-8. doi: 10.1007/BF00177647.
Quantitative layer-by-layer perimetry is a psychophysical technique which assesses lateral interaction in human vision. In prior designs of this technique the test procedure was time-consuming and quantitative assessment of the results was not possible. In order to shorten test duration and provide quantitative experimental data, a new computerized version of the technique has recently been developed.
A mathematical model for describing lateral interaction as assessed by computerized quantitative layer-by-layer perimetry was developed, and experimental data from the testing of 18 normal persons were fitted to the model. Two descriptive parameters of, respectively, lateral stimulation and lateral inhibition were for each test point related to the differential light sensitivity and to the eccentricity in the visual field.
The two parameters describing lateral stimulation could not be reliably estimated. However, the two parameters describing lateral inhibition showed, respectively, a positive correlation with the differential light sensitivity in the visual field and a significant decline with increasing eccentricity in the visual field.
The technique and the mathematical model employed are suitable for quantitative assessment of lateral inhibition in human vision.
定量分层视野检查法是一种评估人类视觉中侧向相互作用的心理物理学技术。在该技术的先前设计中，测试过程耗时且无法对结果进行定量评估。为了缩短测试时间并提供定量实验数据，最近开发了该技术的一种新的计算机化版本。
建立了一个用于描述通过计算机化定量分层视野检查法评估的侧向相互作用的数学模型，并将18名正常人的测试实验数据拟合到该模型中。对于每个测试点，分别与视野中的差异光敏感度和偏心率相关的两个描述性参数，即侧向刺激和侧向抑制。
描述侧向刺激的两个参数无法可靠估计。然而，描述侧向抑制的两个参数分别与视野中的差异光敏感度呈正相关，并且随着视野中偏心率的增加而显著下降。
所采用的技术和数学模型适用于对人类视觉中的侧向抑制进行定量评估。
