THE FLICKER AND PHOTOPIC ELECTRORETINOGRAM IN AGE-RELATED MACULAR DEGENERATION
- VernacularTitle:老年黄斑变性的闪烁光和明视视网膜电图
- Author:
Feng WEN
;
Dezheng WU
;
Lezheng WU
- Publication Type:Journal Article
- Keywords:
Macular degeneraton Electroretinography Aged
- From:
Chinese Journal of Ocular Fundus Diseases
1996;0(01):-
- CountryChina
- Language:Chinese
-
Abstract:
Flicker and photopic eletroretinogram(ERG)were recorded for 45 eyes of dry type of age-related macular degeneration(AMD)and 24 eyes of wet type of AMD respectively, the amplitude and phase of fundamental response compoment(30Hz)by discrete Fourier tranform(DFT)were analysed. The abnormality ratios of phases and amplitudes in fundamental responses, amplitudes of photopic white or red b-waves were 48.89%, 8.89%, 10.11% and 8.89% respectively. The visual acuities of 24 eyes were 1.0 or better, the abnormality ratios of phases were up to 37.50%. These suggest that the change of phases is a sensitive method for detecting the early abnormality of visual function in AMD. The abnormality ratios of phases and amplitudes in fundamental responses were 62.5% and 45.84% in wet type of AMD. The differences between dry type and wet type in amplitudes of fundamental responses and photopic b-waves were statistically significant(P
