视觉功能的亚临床变化调节视觉依赖 - 独立于年龄
Amir Saman Fathi1,2, David Andrew Green3,4,5
1King's College London, Centre of Human & Applied Physiological Sciences (CHAPS), Room 3.14 Shepherd's House, Guy's Campus, London, SE1 1UL, UK. amir.fathi@kcl.ac.uk.
Experimental brain research
|October 29, 2024
概括
与跌倒风险相关的视觉依赖,不会随着年龄的增长而增加. 相反,视觉敏度和对比度敏感度的微妙下降解释了成年人视觉空间定向错误的变化.
科学领域:
- 视觉科学 视觉科学 视觉科学
- 老年学是一门学科.
- 人类因素 人类因素
背景情况:
- 视觉依赖,跌倒风险的一个因素,矛盾的是,随着年龄的增长,尽管典型的视觉功能下降.
- 了解衰老,视觉功能和视觉依赖之间的关系对于预防跌倒的策略至关重要.
研究的目的:
- 研究年龄,客观和主观视觉功能测量和健康年轻人和老年人视觉依赖之间的关联.
- 为了确定与年龄相关的视力下降是否会影响视觉依赖性和空间定向准确性.
主要方法:
- 评估了44名健康成年人 (年轻人和老年人) 的客观视觉功能 (视觉敏度,对比度敏感性,深度感知,外围视觉) 和主观视觉功能 (VFQ-25).
- 使用主观视觉垂直 (SVV) 倾斜误差和通过RDT (Rod and Disc Test) 测量视觉依赖,并通过RDT测试来测量运动病的易感性.
- 采用曼-惠特尼U测试进行群组比较和多重回归建模,以确定SVV变化的决定因素.
主要成果:
- 与年轻人相比,老年人表现出较低的视力敏度和对比度敏感性.
- 视觉依赖,通过SVV倾斜误差测量,与年龄没有显著相关.
- 视觉敏度和对比度灵敏度显著,虽然适度,预测SVV倾斜误差在两个年龄组的变化.
结论:
- 视力敏度和对比度敏感度的亚临床变化,而不是年龄本身,有助于空间定向变化 (SVV倾斜误差).
- 这些发现凸显了视觉敏度和对比度敏感度在维持成年人一生中的空间稳定性方面的重要性.
- 需要进一步的研究,以探索视觉依赖和跌倒风险中的视觉,前庭,体感,认知和行为因素的相互作用.
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