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Abstract：
Binocular vision anomalies are major causes of asthenopia symptoms, particularly among the younger population. This study aimed to report the clinical characteristics of Sudanese patients with binocular disorders who attended the orthoptic clinic at Al-Neelain Eye Hospital. In this retrospective hospital-based study, we analyzed data from 304 patients with binocular vision anomalies who visited the orthoptic clinic between October 2020 and June 2021. We collected information on demographics, symptoms, and eye tests such as visual acuity (VA), refractive error (RE), angle of deviation, and the assessment of fusional vergence. Our findings indicated that exophoria was the most common binocular vision anomaly, affecting 79.8% of males and 71.6% of females (p=0.731). Children between 6 and 17 years old showed the highest prevalence of exophoria (75.9%) (p=0.0001). Among patients with exophoria, 100% reported itching associated with tearing during fixation, while 89.5% experienced difficulty in fixation. Refractive error varied by the type of binocular vision disorders (p=0.0001), with higher hyperopia observed in cases of unilateral esotropia and alternate esotropia (+3.571±1.238 D and +3.023±1.553 D, respectively). Positive fusional vergence (PFV) differed by types of binocular vision disorders (p=0.0001) with high PFV in esophoria (18.063±6.848∆) compared to low PFV in exophoria (12.80±5.313∆). The most common types of exophoria were convergence weakness exophoria (45.39%), followed by convergence insufficiency (20.39%). The study concluded that exophoria was the most common binocular vision anomaly among Sudanese patients, with convergence weakness and convergence insufficiency being the predominant anomalies. Headache was commonly prevalent among patients with binocular vision problems. Higher hyperopia was found in esodeviation, while low PFV was associated with exodeviation.
摘要：
双眼视力异常是导致视疲劳症状的主要原因，特别是在年轻人口中。这项研究旨在报告在Al-Neelain眼科医院就诊的双眼疾病苏丹患者的临床特征。在这项以医院为基础的回顾性研究中，我们分析了在2020年10月至2021年6月期间就诊的304例双眼视力异常患者的数据.我们收集了人口统计信息,症状,和视力测试，如视力（VA），屈光不正(RE),偏差角,以及融合收敛的评估。我们的发现表明，外倒影是最常见的双眼视觉异常，影响79.8%的男性和71.6%的女性(p=0.731)。6至17岁儿童的外隐患病率最高（75.9％）（p=0.0001）。在外隐症患者中，100%报告与固定期间撕裂相关的瘙痒，而89.5%的人经历了固定困难。屈光度因双眼视觉障碍的类型而异（p=0.0001），在单侧内斜视和备用内斜视的情况下观察到较高的远视（3.571±1.238D和3.023±1.553D，分别)。正融合聚散（PFV）因双眼视觉障碍的类型而异（p=0.0001），与高PFV（18.063±6.848Δ）相比，高PFV（12.80±5.313Δ）。最常见的外隐类型为会聚弱性外隐(45.39%),其次是收敛不足(20.39%)。这项研究的结论是，在苏丹患者中，外倒影是最常见的双眼视觉异常，收敛弱点和收敛不足是主要的异常现象。头痛在双眼视力问题患者中普遍存在。高度远视见于内偏，而低PFV与外向偏差有关。
