Objective To study the waveform of the photopic negative response (PhNR) in electroretinogram(ERG), the relationship between PhNR and retina nerve fiber layer thickness(RNFLT), and to determine how the PhNR and RNFLT altered after onset of symptom.

• 目的研究视网膜电图(ERG)明视负向反应(PhNR)在原发性视神经萎缩进展中的变化特点以及与视网膜神经纤维层厚度(RNFLT)的关系。