Spafford M M, Lu S L
School of Optometry, University of Waterloo, Ontario, Canada.
Optom Vis Sci. 1989 Aug;66(8):507-14. doi: 10.1097/00006324-198908000-00003.
The patterned visually evoked potential (pVEP) and patterned electroretinogram (pERG) after light and dark adaptation were investigated in 10 visually normal human observers. The influence of retinal preadaptation on the pVEP appeared to be dependent on the stimulus field size. With a 6 degree field size retinal adaptation effects were not apparent, but with a 12 degree field size the amplitudes of the dark-adapted steady-state pVEP (ssVEP) and transient pVEP (tVEP) were significantly larger than the light-adapted amplitudes. Similarly pERG's elicited by a 12 degree field size produced larger amplitude dark-adapted results. The implications of these findings are discussed. Monitoring the temporal changes in the pVEP subsequent to different retinal preadaptation levels proved to be inconclusive for the conditions studied.
我们对10名视力正常的人类观察者在明适应和暗适应后进行了图形视觉诱发电位（pVEP）和图形视网膜电图（pERG）研究。视网膜预适应对pVEP的影响似乎取决于刺激野大小。对于6度的刺激野大小，视网膜适应效应不明显，但对于12度的刺激野大小，暗适应稳态pVEP（ssVEP）和瞬态pVEP（tVEP）的振幅明显大于明适应振幅。同样，由12度刺激野大小诱发的pERG产生了更大振幅的暗适应结果。我们讨论了这些发现的意义。在所研究的条件下，监测不同视网膜预适应水平后pVEP的时间变化结果尚无定论。
