The study of visual processing: effects of wide-field visual stimuli and spatial frequencies on optokinetic nystagmus and afternystagmus

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K11999
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 61020:Human interface and interaction-related
• Research Institution: Kyoto Prefectural University of Medicine
• Principal Investigator: Taki Masakatsu 京都府立医科大学, 医学(系)研究科(研究院), 講師 (30453111)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 視運動性眼振 / 眼球位置 / 広視野角 / 空間周波数

Outline of Final Research Achievements

Optokinetic nystagmus is a rythmical eye movement when the subject is watching the visual stimuli moving in one direction. We studied the effects of wide field size and spatial frequency of visual stimuli on gaze orientation of optokinetic nystagmus. The sine grating were made by computer graphics and presented on the one or three monitors which equal to 90 or 270 degree size, respectively. They were performed at verly low cost. The mean standard deviations of horizontal gaze positoins and the areas of 95% confidence ellipse of optokinetic nystagmus occurred by 90 degree field size were significantly larger than those by 270 degree. Such difference between field sizes were observed for the spatial frequencies of 0.25 cycle per degree and more.

Free Research Field

眼球運動

Academic Significance and Societal Importance of the Research Achievements

現在PCモニターも120度以上ある広視野角のものや、バーチャルリアリティのヘッドマウントディスプレイも120度のもの、アイトラッキング機能の付いたものもある。ベクション、映像酔いなどの観点から、今回の実験結果が上記機器の改善の一助になる基礎的実験になったと考える。