Poster Session: Fixational Eye Movements in Myopia.
Poster Session: Fixational Eye Movements in Myopia.
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海报会议：近视眼的注视眼球运动。
DOI：
10.1167/jov.23.11.41
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发表时间：
2023
影响因子：
1.8
通讯作者：
Rucci,Michele
中科院分区：
文献类型：
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作者：
Clark,AshleyM;Cox,MicheleA;Wu,Ruei-Jr;Intoy,Janis;Rucci,Michele
在注视过程中，眼睛的不断漂移使撞击在视网膜上的图像始终处于运动状态。先前的工作表明，眼球漂移引起的亮度调制在正视眼中发挥着重要的视觉功能(Intoy&Rucci，2020；Clark等人，2022)。然而，眼球漂移在近视下是如何变化的尚不清楚，近视是一种通常由眼睛伸长引起的视觉损伤。我们使用数字Dual-Purkinje图像眼球跟踪器测量了19名近视程度不同(-0.25D至-6.5D)的人的眼球运动，这是一种最近开发的亚弧度分辨率系统。受试者用Badal验光仪矫正视力，用单眼观察刺激。他们参与了两个高清晰度的任务：(A)眼图20/20线的分辨率(5个均匀分布的翻滚E视标)；(B)更自然的任务，向受试者展示远处面孔的图像(1⁰)，并要求他们报告图像的凝视方向。我们发现近视眼的眼球漂移特征与正视眼不同。近视观察者漂移速度更快，弯曲程度更小。在视网膜上，这些变化导致亮度调制以牺牲高空间频率为代价放大低空间频率，因此高频信号在近视眼中实际上更弱。这些结果与精细空间视觉强烈依赖于眼球运动诱导的亮度调制的观点一致，并强调了近视患者考虑细微眼球运动的重要性。
During fixation, an incessant drift of the eye keeps the image impinging on the retina always in motion. Previous work indicated that luminance modulations from ocular drift serve important visual functions in emmetropes (Intoy & Rucci, 2020; Clark et al 2022). However, it remains unknown how ocular drift varies under myopia, a visual impairment commonly caused by eye elongation. We measured eye movements in 19 individuals with varying degrees of myopia (-0.25 D to-6.5 D) using a digital Dual-Purkinje Image eye-tracker, a recently developed system with sub-arcminute resolution. Subjects observed stimuli monocularly with vision corrected via a Badal optometer. They engaged in two high-acuity tasks:(a) resolution of a 20/20 line of an eye chart (5 evenly spaced tumbling E optotypes); and (b) a more natural task where subjects were presented with images of distant faces (1⁰) and asked to report the image’s gaze direction. We show ocular drift characteristics differ in myopes relative to emmetropes. Drift was faster and less curved in myopic observers. On the retina, these changes result in luminance modulations that amplify low spatial frequencies at the expense of high spatial frequencies, so that high-frequency signals are effectively weaker in myopes These results are consistent with the proposal that fine spatial vision strongly relies on oculomotor-induced luminance modulations and emphasize the importance of considering fine eye movements in myopia.