随着全世界范围进入老龄化社会，老年人口逐年增加，视觉障碍和认知障碍也因此成为全球性的重要问题，给全球带来了极大的社会经济负担。近年来，大量的研究表明视觉障碍与认知障碍之间存在密切的联系，视觉障碍患者更容易发生认知能力下降，尤其是痴呆症。此外，也有证据表明，改善视力对认知功能的改善有显著的效果，通过提高视功能可以延缓认知功能下降和痴呆的发展，这为公共卫生工作通过改善视功能延缓和减轻认知功能下降和痴呆提供了新的思路。视觉障碍与认知障碍之间关联的可能机制尚不明确，有待深入研究。

As aging societies enter worldwide, the elderly population is increasing year by year, and visual and cognitive impairment have thus become important global issues, imposing a significant socioeconomic burden worldwide. In recent years, a large number of studies have shown a strong association between visual and cognitive impairments, with patients with visual impairment being more likely to experience cognitive decline, especially dementia. In addition, there is also evidence that improving visual acuity has a significant effect on cognitive function, and that by improving visual function, the development of cognitive decline and dementia can be delayed, which provides new ideas for public health efforts to delay and mitigate cognitive decline and dementia by improving visual function. The possible mechanisms underlying the association between visual and cognitive impairment remain unclear and need to be studied further.