Objective: To investigate the waveform of the first-order kernel and second-order kernel of multifocal electroretinogram stimulated by light emitting diode (LED) from the normal eyes, and compare it to the wave stimulated by cathode ray tube (CRT).

• 目的:观察正常眼由二极管发光器(light emitting diode,LED)诱发的多焦视网膜电图(multifocal electroretin-nogram,mfERG)的一阶及二阶波形特点及变化趋势,并分析其与阴极射线管(cathode ray tube,CRT)刺激器诱发的mfERG的区别。