PDF(Pubmed)
Abstract：
UNASSIGNED: Aniseikonia is a binocular vision disorder that has been associated with asthenopic symptoms. However, asthenopia has been evaluated with subjective tests that make difficult to determine the level of aniseikonia. This study aims to objectively evaluate the impact of induced aniseikonia at different levels on visual fatigue by measuring the orbicularis oculi muscle activity in the dominant and non-dominant eyes while performing a reading task.
UNASSIGNED: Twenty-four collegiate students (24.00 ± 3.86 years) participated in this study. Participants read a passage for 7 minutes under four degrees of aniseikonia (0%, 3%, 5% and 10%) at 50 cm. Orbicularis oculi muscle activity of the dominant and non-dominant eye was recorded by surface electromyography. In addition, visual discomfort was assessed after each task by completing a questionnaire.
UNASSIGNED: Orbicularis oculi muscle activity increased under induced aniseikonia (i.e., greater values for the 10% condition in comparison to 0%, and 3% conditions (p = 0.034 and p = 0.023, respectively)). No statistically significant differences were observed in orbicularis oculi muscle activity for the time on task and between the dominant and non-dominant eyes. Additionally, higher levels of subjective visual discomfort were observed for lower degrees of induced aniseikonia.
UNASSIGNED: Induced aniseikonia increases visual fatigue at high aniseikonia degrees as measured by the orbicularis oculi muscle activity, and at low degrees as measured with subjective questionnaires. These findings may be of relevance to better understand the visual symptomatology of aniseikonia.
UNASSIGNED: Twenty-four collegiate students (24.00 ± 3.86 years) participated in this study. Participants read a passage for 7 minutes under four degrees of aniseikonia (0%, 3%, 5% and 10%) at 50 cm. Orbicularis oculi muscle activity of the dominant and non-dominant eye was recorded by surface electromyography. In addition, visual discomfort was assessed after each task by completing a questionnaire.
UNASSIGNED: Orbicularis oculi muscle activity increased under induced aniseikonia (i.e., greater values for the 10% condition in comparison to 0%, and 3% conditions (p = 0.034 and p = 0.023, respectively)). No statistically significant differences were observed in orbicularis oculi muscle activity for the time on task and between the dominant and non-dominant eyes. Additionally, higher levels of subjective visual discomfort were observed for lower degrees of induced aniseikonia.
UNASSIGNED: Induced aniseikonia increases visual fatigue at high aniseikonia degrees as measured by the orbicularis oculi muscle activity, and at low degrees as measured with subjective questionnaires. These findings may be of relevance to better understand the visual symptomatology of aniseikonia.
摘要：
■Aniseikonia是一种双眼视觉障碍，与哮喘症状有关。然而,已经通过主观测试评估了视疲劳，这使得难以确定aniseikonia的水平。本研究旨在通过在执行阅读任务时测量显性和非显性眼睛的眼轮匝肌活动，客观地评估不同水平的诱发厌食症对视疲劳的影响。
■24名大学生（24.00±3.86岁）参加了这项研究。参与者在四度aniseikonia下阅读一篇文章7分钟(0%，3%,5％和10％）在50厘米处。通过表面肌电图记录优势和非优势眼的眼轮匝肌活动。此外,在完成每个任务后,通过填写问卷评估视觉不适.
■眼轮匝肌活动在诱导aniseikonia下增加（即，与0%相比，10%条件的值更大，和3%条件(分别为p=0.034和p=0.023)。在任务时间以及优势和非优势眼之间，眼轮匝肌活动均未观察到统计学上的显着差异。此外,对于较低程度的诱发aniseikia，观察到较高水平的主观视觉不适。
■诱导的aniseikonia在高aniseikonia度时增加视觉疲劳，如通过眼轮匝肌活动测量的，用主观问卷衡量的程度较低。这些发现可能与更好地了解aniseikonia的视觉症状有关。
■24名大学生（24.00±3.86岁）参加了这项研究。参与者在四度aniseikonia下阅读一篇文章7分钟(0%，3%,5％和10％）在50厘米处。通过表面肌电图记录优势和非优势眼的眼轮匝肌活动。此外,在完成每个任务后,通过填写问卷评估视觉不适.
■眼轮匝肌活动在诱导aniseikonia下增加（即，与0%相比，10%条件的值更大，和3%条件(分别为p=0.034和p=0.023)。在任务时间以及优势和非优势眼之间，眼轮匝肌活动均未观察到统计学上的显着差异。此外,对于较低程度的诱发aniseikia，观察到较高水平的主观视觉不适。
■诱导的aniseikonia在高aniseikonia度时增加视觉疲劳，如通过眼轮匝肌活动测量的，用主观问卷衡量的程度较低。这些发现可能与更好地了解aniseikonia的视觉症状有关。
