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Purpose: To study the effects of intra-vitreal injection of ranibizumab on pattern electroretinogram (PERG) and multifocal electroretinogram(MF-ERG) parameters in choroidal neovascularization and to test the retinal toxicity of ranibizumab.Method: Fifty eyes of 50 patients with subfoveal choroidal neovascularization were included in the study. Thirty (30) eyes had neovascular age related macular degeneration (nAMD) and 20 eyes had myopic choroidal neovascularization. Ranibizumab was injected intravitreal monthly for3 months. Optical Coherence Tomography Angiography (OCT) was performed at the initial and final visits. Visual acuity, Pattern and multifocal electroretinography (PERG, MFERG) were performed before and at 1,2,3,6 months after intravitreal injection.Results: There was no clinical significant reduction of parameters of either MFERG or PERG after intravitreal injection of ranibizumab. There was significant increase in visual acuity, decrease in central macular thickness ,decrease in total macular volume and improvement in the parameters of both PERG and MFERG after intravitreal injection.Conclusion: Intravitreal injection of ranibizumab is effective in treatment CNV and safe. It has no retinal toxicity since no reduction in PERG&amp; MFERG parameters.Keywords: AMD; Ranibizumab; PERG; MFERG

Electrophysiological study after ranibizumab in choroidal neovascularizat