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T.L. Alvarez, K.D. Beck, A. Daftari, F.B. Chua, R. DeMarco, M.T. Bergen, R.J. Servatius; Effect of After Image on Saccadic Eye Movements . Invest. Ophthalmol. Vis. Sci. 2003;44(13):1969.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: Saccadic oculomotor control is a sophisticated system responsible for locating objects in two-dimensional space. We investigated how a single burst of light affects the neural strategy of locating an object through saccadic movement. Methods: Horizontal eye movements were recorded using the Skalar infrared limbus tracking system model 6500. Experiments took place in the dark where a subject would initiate an experiment with a trigger button followed by a random delay to avoid subject anticipation. A flash of light was produced by a Grass photic stimulator model PS33 plus when the subject pressed a trigger button. A new target position was illuminated after a random delay. Results: The control responses, a 15 deg saccadic movement, were compared to a 15 deg saccadic movement with a flash presented in the left, center, and right visual fields. The latency, time from stimulus onset to peak velocity increased when a flash was present in the experiment. Conclusions: Preliminary data suggest temporal changes occur as a result of flash presentation.
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