The Effect of Stimulus Contrast and Spatial Position on Saccadic Eye Movement Parameters

被引:2
|
作者
Goliskina, Viktorija [1 ]
Ceple, Ilze [1 ]
Kassaliete, Evita [1 ]
Serpa, Evita [1 ]
Truksa, Renars [1 ]
Svede, Aiga [1 ]
Krauze, Linda [1 ]
Fomins, Sergejs [2 ]
Ikaunieks, Gatis [1 ]
Krumina, Gunta [1 ]
机构
[1] Univ Latvia, Fac Phys Math & Optometry, Dept Optometry & Vis Sci, LV-1586 Riga, Latvia
[2] Univ Latvia, Inst Solid State Phys, LV-1063 Riga, Latvia
关键词
saccadic eye movements; saccadic eye movement parameters; stimulus parameters; LATENCY; VOLUNTARY;
D O I
10.3390/vision7040068
中图分类号
R77 [眼科学];
学科分类号
100212 ;
摘要
(1) Background: Saccadic eye movements are rapid eye movements aimed to position the object image on the central retina, ensuring high-resolution data sampling across the visual field. Although saccadic eye movements are studied extensively, different experimental settings applied across different studies have left an open question of whether and how stimulus parameters can affect the saccadic performance. The current study aims to explore the effect of stimulus contrast and spatial position on saccadic eye movement latency, peak velocity and accuracy measurements. (2) Methods: Saccadic eye movement targets of different contrast levels were presented at four different spatial positions. The eye movements were recorded with a Tobii Pro Fusion video-oculograph (250 Hz). (3) Results: The results demonstrate a significant effect of stimulus spatial position on the latency and peak velocity measurements at a medium grey background, 30 cd/m2 (negative and positive stimulus polarity), light grey background, 90 cd/m2 (negative polarity), and black background, 3 cd/m2 (positive polarity). A significant effect of the stimulus spatial position was observed on the accuracy measurements when the saccadic eye movement stimuli were presented on a medium grey background (negative polarity) and on a black background. No significant effect of stimulus contrast was observed on the peak velocity measurements under all conditions. A significant stimulus contrast effect on latency and accuracy was observed only on a light grey background. (4) Conclusions: The best saccadic eye movement performance (lowest latency, highest peak velocity and accuracy measurements) can be observed when the saccades are oriented to the right and left from the central fixation point. Furthermore, when presenting the stimulus on a light grey background, a very low contrast stimuli should be considered carefully.
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页数:13
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