Foutch Brian K, Bassi Carl J
Rosenberg School of Optometry, University of the Incarnate Word, San Antonio, TX 78209, USA.
College of Optometry, University of Missouri-St Louis, St. Louis, MO 63121, USA.
Vision (Basel). 2020 Mar 12;4(1):19. doi: 10.3390/vision4010019.
Eye dominance is often defined as a preference for the visual input of one eye to the other. Implicit in this definition is the dominant eye has better visual function. Several studies have investigated the effect of visual direction or defocus on ocular dominance, but there is less evidence connecting ocular dominance and monocular visual thresholds. We used the classic "hole in card" method to determine the dominant eye for 28 adult observers (11 males and 17 females). We then compared contrast thresholds between the dominant and non-dominant eyes using grating stimuli biased to be processed more strongly either by the magnocellular (MC) or parvocellular (PC) pathway. Using non-parametric mean rank tests, the dominant eye was more sensitive overall than the non-dominant eye to both stimuli (z = -2.54, = 0.01). The dominant eye was also more sensitive to the PC-biased stimulus (z = -2.22, = 0.03) but not the MC-biased stimulus (z = -1.16, = 0.25). We discuss the clinical relevance of these results as well as the implications for parallel visual pathways.
眼优势通常被定义为对一只眼睛的视觉输入优于另一只眼睛的偏好。该定义隐含的意思是优势眼具有更好的视觉功能。几项研究调查了视觉方向或散焦对眼优势的影响，但将眼优势与单眼视觉阈值联系起来的证据较少。我们使用经典的“卡片上的洞”方法为28名成年观察者（11名男性和17名女性）确定优势眼。然后，我们使用偏向于由大细胞（MC）或小细胞（PC）通路更强处理的光栅刺激，比较优势眼和非优势眼之间的对比度阈值。使用非参数平均秩检验，优势眼总体上比非优势眼对两种刺激都更敏感（z = -2.54，P = 0.01）。优势眼对PC偏向刺激也更敏感（z = -2.22，P = 0.03），但对MC偏向刺激不敏感（z = -1.16，P = 0.25）。我们讨论了这些结果的临床相关性以及对平行视觉通路的影响。
