Modification of saccades through light stimulation

F. B. Chua, T. L. Alvarez, K. D. Beck, A. P. Daftari, R. M. Demarco, M. T. Bergen, R. J. Servatius

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


Brief flashes of light can alter the oculomotor behavior of tracking an intended target. A potential cause may be decreased visibility or disappearance of the target caused by visual masking due to the flash. This study performed a temporal analysis of saccadic eye movements when a brief 10 μsec flash of white light was presented in the center, right or left visual field while subjects actively attempted to track a target that began along the midline and horizontally moved 15 degrees into the left or right visual field. Flash trials were compared to non-flash trials (control). Two temporal parameters were measured: the time to peak velocity and the time required for the response to attain ± one degree of the target Compared with non-flash trials, the time to peak velocity increased. Yet, statistical significance was only observed when the flash of light was presented in the same visual field as the target, suggesting an ipsilateral masking effect When comparing flash trials to controls, statistical significance was observed in the time it took to attain the target within ± one degree when the flash was presented in the contralateral, ipsilateral or center visual field of the target. The statistically significant changes observed are strongly speculated to be primarily attributed to visual masking; however decreased attention caused by distracters as well sensory overload due to after-images also caused modifications in saccadic behavior.

Original languageEnglish (US)
Article number1.P1.4
Pages (from-to)32-33
Number of pages2
JournalProceedings of the IEEE Annual Northeast Bioengineering Conference, NEBEC
StatePublished - 2005
EventProceedings of the 2005 IEEE 31st Annual Northeast Bioengineering Conference - Hoboken, NJ, United States
Duration: Apr 2 2005Apr 3 2005

All Science Journal Classification (ASJC) codes

  • General Chemical Engineering


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