Fixational drift and nasal-temporal pursuit asymmetries in strabismic amblyopes.

摘要: This study evaluated to what extent inaccurate and asymmetric smooth pursuit in strabismic amblyopic eyes is attributable abnormally high-velocity eye drifts that these exhibit during monocular fixation. Smooth gains (peak velocity/peak target velocity) were determined the nonamblyopic of 11 strabismics for nasalward temporalward motion; oscillated across 6 degrees horizontal meridian at frequencies ranging from 0.0625 1 Hz. In general, higher than motion, both eyes. Correction each eye's mean velocity fixational drift eliminated this nasal-temporal asymmetry most eyes, but not Compared corrected averaged about 0.2 lower 0.4 temporalward, substantial variation occurred among individuals. We suggest overall reduction gain (after correction made bias) stems use a nonfoveal (eccentric fixation) locus tracking; further may result processing motion signals.