Saccadic Reaction Times in Alternating Cover. (June 2013)

• Record Type: Journal Article
• Authors: Shinomiya, Yuma; Yamada, Tetsuto; Suzuki, Kenji; Komachi, Yuko; Niida, Takahiro
• Is Part Of: Strabismus. Volume 21:Number 2(2013:Jun.)
• Page Start: 74
• Page End: 77
• Publication Date: 2013-06
• Subjects: Strabismus -- Periodicals; Neurophysiology -- Periodicals; 617.762
• DOI: 10.3109/09273972.2013.786744
• Languages: English
• ISSNs: 0927-3972

Abstract

<abstract> <title>Abstract</title> <p> <italic>Purpose</italic>: The aim of this study was to compare saccadic reaction times (SRTs) during the alternating cover with SRTs during monocular viewing.</p> <p> <italic>Methods</italic>: Seven subjects with intermittent exotropia, eight subjects with esophoria and ten control subjects were participated. The normal-task was to fixate the central fixation point until the peripheral target appeared randomly either 5 degrees to the right or left. In the alternating cover task (AC-task), the cover was switched from the fixating eye to the other eye, central fixation target was simultaneously extinguished and peripheral target was lit. An infrared limbal-tracking system and electro-oculogram were used for measurements of eye movements. The study followed the tenets of the Declaration of Helsinki. We certify that there is no conflict of interest.</p> <p> <italic>Results</italic>: In AC-task, the average SRTs of control subjects, subjects with exophoria and subjects with intermittent exotropia were 224.2 ± 46.5 ms, 198.2 ± 45.3 ms and 227.3 ± 69.9 ms, respectively. On the other hand, the average SRTs of control subjects, subjects with exophoria and subjects with intermittent exotropia in normal-task were 200.7 ± 37.8 ms, 178.2 ± 34.6 ms and 185.4 ± 54.1 ms, respectively.</p> <p> <italic>Conclusions</italic>: The SRTs of most control subjects, subjects with exophoria and subjects with intermittent exotropia in AC-task were prolonged compared to normal-task.</p> </abstract>