相关实验视频
Updated: Jun 10, 2025

05:36
Subjective Refraction Test Using a Smartphone for Vision Screening
Published on: October 18, 2024
617
在遥感数字图像上,生活环境的较高阴影比率可能会保护青少年近视
Hanze Zhang1, Ningyuan Zhang2, Zeyu Li2
1Department of Ophthalmology, First affiliated hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China.
Scientific reports
|October 11, 2024
概括
高层建筑模式可以防止青少年近视. 增加的阴影区域 (PSA) 与较低的近视率相关,这表明在城市环境中具有保护作用.
科学领域:
- 环境科学 环境科学
- 眼科医生 眼科 眼科
- 城市规划 城市规划
背景情况:
- 青少年近视是一种日益严重的公共卫生问题,特别是在人口密的城市地区.
- 了解环境对近视发展的影响对于有效的预防策略至关重要.
研究的目的:
- 调查住宅建筑模式与青少年近视之间的关系.
- 评估阴影比例 (PSA) 和绿色比例 (PGA) 对近视水平的影响.
主要方法:
- 在中国一个大城市的10年级学生中进行了一项调查,收集了近视,家庭地址和混因素的数据.
- 分析卫星图像,计算每位学生家中500米半径内的PSA和PGA.
- 在近视水平和环境因素之间进行了相关性和比较分析.
主要成果:
- 近视的患病率:39.2%轻度,32.5%中度,83%高度.
- 在近视水平和PSA之间发现了显著的负相关性 (r=-0.189,P=0.05).
- 在高PSA (>20%) 的地区的学生显示出明显较低的近视水平 (χ2=8.361,P=0.038).
结论:
- 高层建筑,导致PSA增加,可能作为预防青少年近视的保护因素.
- 结合创造阴影的元素的城市规划可以减轻大城市近视的进展.
- 需要进一步的研究来证实这些发现,并探索潜在的机制.
相关概念视频
Photoreceptors and Visual Pathways
5.8K
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
5.8K
Focusing of Light in the Eye
2.5K
Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
2.5K

