Multifocal electroretinography (ERG), developed by Sutter in 1992, is a method of recording the spatial distribution of focal ERG in a short time period using multi-input stimulation. Using this technique, we can detect the spatial extent and severity of damage to the macula. In this study, we recorded multifocal ERGs from 20 eyes of 20 normal subjects and analyzed the topographical properties ...

Focal electroretinograms (FERG), pattern electroretinograms (PERG), and visual evoked potentials (VEP) were studied in a group of 30 aphakic patients with cystoid macular oedema (ACME). When compared with a control group of age-matched aphakics, 35% of patients were found to have abnormal FERG responses and 53%--over half of whom had normal FERG responses--showed abnormal PERG amplitudes. Altho...

PURPOSE To test the feasibility of recording rod multifocal electroretinograms (ERGs) from the mouse eye. METHODS Multifocal ERGs were recorded from normal mice (C57BL/6J) using an array of equal-sized hexagons. Local stimuli were blue (W47A), and the number of blank frames between successive flashes at the same location was fixed at 14 (minimum 200 msec between flashes). Flash and surround i...

Cortically blind patients with brain damage restricted to the optic radiations or primary visual cortex may be able to detect and discriminate visual stimuli presented in their field defects, even though they deny seeing them. In contrast, patients who are hemianopic as a result of cerebral hemispherectomy cannot explicitly discriminate visual stimuli in their field defects, even when forced ch...

PURPOSE Patients with typical clinical features of retinitis pigmentosa were found to have the atypical electroretinographic finding of a negative waveform to a bright flash in the dark-adapted state. The full-field electroretinogram (ERG) was studied in seven such patients to understand better the pathophysiology. METHODS Rod ERGs were isolated using blue and red flash stimuli in the dark-ad...

in patients with nonarteritic anterior ischemic optic neuropathy. Differential diagnosis of concentric visual field defects using electrophysiological methods. patterns of cone degeneration in retinitis pigmentosa with concentric narrowing of the visual field. electroretinograms and visual evoked potentials in retinitis pigmentosa. Documenta of multifocal electroretinograms obtained under monoc...