![]() ![]() The images observed by the left and right eyes are divided into three quarters of a period of sine function as shown in Figure 1a, at a glance y = sin( x)( x = ) grayscale image as shown in Figure 1b, at a glance y = sin( x) ( x = ) grayscale image. The binocular contrast balance task is composed of sine bars. Through this exploratory study, the relationship between BI and myopia is clinically evaluated, and new clues for the role of visual perception abnormalities in the onset and development of myopia are examined.īI was assessed using a modified version of the dichoptic eye chart developed by the National Medical and Healthcare Appliance Engineering Technology Research Center implemented in a VR device (Vive by HTC Co.). To our knowledge, this is the first study to quantitatively compare BI in a population of children and teenagers with myopia. 9 In this study, the BI test based on a virtual reality (VR) platform was used to quantify BI. 8 A study by Li and colleagues showed that BI was common even in normal subjects. showed that BI was greater at high spatial frequency and low temporal frequency in patients with moderate myopia. 7Ī recent cross-sectional study by Vera-Diaz et al. For example, the suppression of the weak eye in amblyopia leads to its poor corrected visual acuity (VA), and to a large extent becomes a factor of stereoscopic vision loss even if there is no structural abnormality in the refractive system of the suppressed eye. In common cases (in which the refractive system is corrected and nonpathological), BI may lead to a variety of visual problems. Binocular imbalance (BI), commonly referred to intermittent partial suppression of monocular vision during binocular fusion, is one of the conditions experienced during BR and binocular fusion. 5, 6 To achieve a high-quality image, both eyes need to work properly and effectively in a synchronous manner. 4 Interestingly, some related concepts have also been recently studied in areas of ophthalmology and vision science.Ĭurrently, nearly a third of the global population has developed myopia, becoming one of the leading causes of vision impairment worldwide. 1–3 ASCs experience significantly higher levels of anomalous perception and have a slower rate of perceptual switching and a longer time spent on the mixed percept (lower rate of BR). Furthermore, the SE of the dominant eye (from the prospective of BI) tends to be more negative than that of the opposite eye as the value increases.Ĭlinical Trial Registration number: ChiCTR2100045457.īinocular rivalry (BR), a psychophysical task with a clear link to cortical excitation and inhibition (E/I) balance, has been widely applied to the study of autism spectrum condition (ASC) characteristics. However, the BI may be accompanied by imbalanced development of the eye refractive system. The BI did not show significant correlation with the unilateral eye refractive state and the VA. BI widely exists within the general pediatric population. The proportion of binocular contrast imbalance (BCI) (the absolute value) maintained the highest level (from 54.42 to 79.17 percent) with the increase of bilateral SE difference in the four subcategories (binocular balance, monocular suppression, binocular rivalry, and BCI). In this cross-sectional study, the imbalance value (IV) did not show a statistical correlation with the spherical equivalent (SE) (oculus dexter : r = 0.022, p = 0.586 oculus sinister : r = −0.021, p = 0.606), and had little correlation with the uncorrected visual acuity (VA) (OD: r = −0.084, p = 0.039 OS: r = −0.034, p = 0.408). BI data were collected by enrolling the first 1,000 adolescents and children aged 6–18 years in Shenzhen Eye Hospital from April 2020 to January 2021. To explore the relationship between binocular imbalance (BI) and the abnormal development of binocular refraction. ![]()
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