Contrast sensitivity of the human pattern electroretinogram.
Contrast thresholds for the pattern electroretinogram (PERG) were measured using lock-in amplifier retrieval of the retinal signal and a swept contrast display. Contrast sensitivity functions (CSF) developed from these PERG contrast thresholds were compared with those established psychophysically under identical stimulus conditions. Whereas the PERG CSF showed a band-pass characteristic across temporal frequency, the psychophysical CSF (and a temporal CSF developed from visual evoked potential contrast thresholds) had a low-pass pattern. Across spatial frequency, the PERG and psychophysical CSFs had similar shapes, although the PERG CSF peaked at a lower spatial frequency than the psychophysical CSF.
D000328:Adult; D004596:Electroretinography / Q000379:methods*; D005074:Evoked Potentials, Visual; D006801:Humans; D008297:Male; D011601:Psychophysics / Q000379:methods; D012684:Sensory Thresholds; D013028:Space Perception / Q000502:physiology; D013998:Time Perception / Q000502:physiology; D014785:Vision, Ocular / Q000502:physiology*