Effects of strabismic amblyopia and strabismus without amblyopia on visuomotor behavior: III. Temporal eye-hand coordination during reaching.

摘要: PURPOSE To examine the effects of strabismic amblyopia and strabismus only, without amblyopia, on temporal patterns eye-hand coordination during both planning execution stages visually-guided reaching. METHODS Forty-six adults (16 with 14 16 visually normal) executed reach-to-touch movements toward targets presented randomly 5° or 10° to left right central fixation. Viewing conditions were binocular, monocular viewing amblyopic eye, fellow eye (dominant nondominant for participants amblyopia). Temporal between hand was examined reach (interval initiation saccade reaching, i.e., saccade-to-reach interval) peak velocity [PV], PV interval). The frequency dynamics secondary reach-related saccades also examined. RESULTS prior comparable among normal adults. However, acceleration phase those only longer following target fixation (saccade-to-reach than that (P < 0.05). This effect evident under all conditions. interval not significantly different levels acuity stereo loss. Participants initiated more frequently participants. amplitude these greater in who had negative stereopsis. CONCLUSIONS Adults showed an altered pattern phase, which might affect their ability modify trajectory using early online control. Secondary may provide a compensatory mechanism facilitate late control process order ensure relatively good reaching performance binocular viewing.