Local Relationship between Global-Flash Multifocal Electroretinogram Optic Nerve Head Components and Visual Field Defects in Patients with Glaucoma

Figure 1

Stimulus sequence of the global-flash multifocal electroretinogram and the resulting response. The global-flash protocol contained a standard m-sequence step, followed by a global flash, then a dark frame, another global flash, and lastly a dark frame. The interval for each frame was 13.33 ms. The amplitude from the baseline to the peak of the second positive deflection in IC response epoch which selected from 60–90 ms was recorded as the ONHC amplitude.