title: Contrast sensitivity of optokinetic nystagmus.
abstract: To determine the threshold characteristics of optokinetic nystagmus (OKN), contrast thresholds for involuntary OKN were measured for gratings of different spatial frequency to yield an OKN-contrast sensitivity function (OKN-CSF). The OKN-CSF resembled an inverted U-shaped function with temporal-to-nasal and nasal-to-temporal movement yielding similar functions. In addition, when psychophysical CSFs were determined for separate form and movement thresholds, it was discovered that the OKN-CSF approximated the psychophysical-movement CSF rather than the psychophysical-form CSF.
authors.affiliation: Department of Ophthalmology, Children's Hospital, Columbus, OH 43205.
authors.forename: L E
authors.initials: LE
authors.lastname: Leguire
authors.forename: B S
authors.initials: BS
authors.lastname: Zaff
authors.forename: S
authors.initials: S
authors.lastname: Freeman
authors.forename: G L
authors.initials: GL
authors.lastname: Rogers
authors.forename: D L
authors.initials: DL
authors.lastname: Bremer
authors.forename: N
authors.initials: N
authors.lastname: Wali
mesh_terms: D000328:Adult; D015350:Contrast Sensitivity / Q000502:physiology*; D006801:Humans; D008297:Male; D009039:Motion Perception / Q000502:physiology; D009760:Nystagmus, Physiologic / Q000502:physiology*; D010364:Pattern Recognition, Visual / Q000502:physiology; D011601:Psychophysics; D012684:Sensory Thresholds / Q000502:physiology; D013997:Time Factors