Schmeisser E T
Am J Optom Physiol Opt. 1985 Mar;62(3):191-4. doi: 10.1097/00006324-198503000-00007.
Steady-state visual evoked potentials (VEP's) were elicited from human volunteers by contrast reversal of a 43% contrast checkerboard pattern resolvable with 6/24 (20/80) Snellen acuity. Superimposed on the fixation point was a Xenon flash lamp subtending 0.358 degrees visual angle, which produced a 0.05 J/cm2 sr flash in 2 microseconds (full width, half maximum). Single pulses of light had no significant effect on the VEP. Increasingly significant decreases in VEP signal magnitude were noted with 2 and 5 pulses of 20 Hz white light. No disruption of VEP phase entrainment was noted with any of the flash exposures. Partial reciprocity was demonstrated between number of flashes at this frequency and response decrement.
通过对一个对比度为43%、可用6/24（20/80）斯内伦视力分辨的棋盘图案进行对比度反转，从人类志愿者身上引出稳态视觉诱发电位（VEP）。在注视点上叠加了一个氙闪光灯，其视角为0.358度，在2微秒内产生0.05 J/cm²·sr的闪光（半高全宽）。单个光脉冲对VEP没有显著影响。随着20 Hz白光的2个和5个脉冲，VEP信号幅度出现了越来越显著的下降。在任何闪光暴露下均未观察到VEP相位同步的中断。在该频率下的闪光次数与反应下降之间表现出部分互易性。
