Crosswell H H, Stewart W C, Cascairo M A, Hunt H H
Department of Ophthalmology, Medical University of South Carolina, Charleston 29425.
Graefes Arch Clin Exp Ophthalmol. 1991;229(2):119-22. doi: 10.1007/BF00170542.
We studied the effect of various background intensities on the components of fluctuation by testing 20 healthy subjects on the Humphrey Field Analyzer. Our results show little difference in the total fluctuation between two low photopic background intensities similar to those commonly used on commercial perimeters: 3.02 dB for 31.5 apostilbs (asb) and 2.77 dB for 3.15 asb. However, an increase in total fluctuation (3.74 dB for 0.315 asb and 4.24 dB for 0.0315 asb) as well as in its short-term, long-term heterogeneous, and interindividual components was seen at mesopic background intensities as compared with the low photopic range. This study suggests that in healthy individuals, little difference exists in the fluctuation resulting from differences in background intensities commonly used on commercial perimeters, whereas mesopic illumination may increase the variability of threshold responses.
我们通过在汉弗莱视野分析仪上对20名健康受试者进行测试，研究了各种背景强度对波动成分的影响。我们的结果表明，在两种低明视觉背景强度之间，总波动几乎没有差异，这两种强度与商业视野计常用的强度相似：31.5 apostilbs（asb）时为3.02 dB，3.15 asb时为2.77 dB。然而，与低明视觉范围相比，在中间视觉背景强度下，总波动（0.315 asb时为3.74 dB，0.0315 asb时为4.24 dB）以及其短期、长期异质性和个体间成分均有所增加。这项研究表明，在健康个体中，商业视野计常用的背景强度差异所导致的波动差异很小，而中间视觉照明可能会增加阈值反应的变异性。
