[Analysis of oscillatory potentials of flectroretinogram]

This study presents a method for the analysis of oscillatory potentials (OPs) of electroretinogram (ERG) in frequency domain and time domain. OPs from 9 cases (9 eyes) of branch retinal vein occlusion, 9 cases (9 eyes) of central retinal vein occlusion and 40 normal control eyes were tested. The frequency spectra of the OPs were derived through Fast Fourier Transform. The mean frequency spectra, the total power, the maximum magnitude, the maximum power and the dominant frequency in frequency domain of the OPs were calculated. The OPs waveforms were re-constructed with the OPs frequency spectra data by counter-Fast Fourier Transform. In time domain, the latencies, the amplitudes and the sum of the amplitudes of the four peaks of OPs were measured.