Yan-Hong Fang
Department of Ophthalmology, Suining Central Hospital, Suining 629000, Sichuan Province, ChinaQiong-Hua Wang
Department of Ophthalmology, Suining Central Hospital, Suining 629000, Sichuan Province, ChinaWen-Jun Gou
Department of Ophthalmology, Suining Central Hospital, Suining 629000, Sichuan Province, ChinaQiang Shen
Department of Ophthalmology, Jiangjin Peoples Hospital, Chongqing 402200, ChinaYing-Yuan Li
Department of Ophthalmology, the Sixth Peoples Hospital of Chengdu, Chengdu 610000, Sichuan Province, ChinaRui-Jin Ran
Department of Ophthalmology, Affiliated Hospital of Hubei University for Nationalities, Enshi 445000, Hubei Province, ChinaAIM: To accurately measure the implicit time and amplitude of a-, b-wave from flash electroretinogram(ERG)through filtering technology, eliminate oscillatory potentials interference.
METHODS: Full-field ERGs were recorded in 30 eyes of 15 physical check-ups, measured the implicit time and amplitude of a-, b-wave, when the passband was set at 0.6～300Hz and 0.6～70Hz, and correlation was performed among those results by paired t-test.
RESULTS: When the passband was set at 0.6～70Hz, a-, b-wave had a single peak, compared with the passband was set at 0.6～300Hz, the implicit time of a-, b-wave was prolonged, amplitude was decreased(P<0.01).
CONCLUSION: A passband of 0.6～70Hz was the best choice to obtain smooth a- and b-waves from the original ERG, It could accurately measure the implicit time and amplitude of a-, b-wave.
Yan-Hong Fang, Qiong-Hua Wang, Wen-Jun Gou,/et al.Signal filtering and parameter variance analysis from flash electroretinogram. Guoji Yanke Zazhi( Int Eye Sci) 2014;14(11):2031-2033
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