通过眼镜传输紫光及其对近视儿童的影响:系统性审查和元分析
Saif Ullah1, Muhammad F Umer2, Suriyakala P Chandran3
1Department of Health Sciences, Lincoln University College, Wisma Lincoln, Petaling Jaya, Selangor Darul Ehsan, Malaysia.
概括
紫光 (VL) 眼镜通过减少轴长度和改善视力,有效控制儿童近视. 需要进一步的研究来了解任何长期影响.
科学领域:
- 眼科医生 眼科 眼科
- 视光学测量 视光学测量 视光学
- 儿科眼科护理 儿科眼科护理
背景情况:
- 近视是一种常见的折射误差,会导致儿童的视力模糊和视力受损.
- 控制近视的进展对于预防长期视力功能障碍至关重要.
- 紫光 (VL) 已成为近视管理的潜在治疗剂.
研究的目的:
- 系统地审查和分析紫光 (VL) 对控制儿童近视的疗效.
- 为了比较VL与单视眼镜 (SVS) 对关键近视参数的影响.
- 具体研究VL对轴长 (AL),球体等效折射 (SER) 和视力敏度 (VA) 的影响.
主要方法:
- 进行了系统性审查和元分析.
- 在PubMed,Embase和Cochrane数据库中使用术语"近视"和"紫光"进行了搜索.
- 贝叶斯元分析评估了AL,SER和VA的聚合效应大小,通过漏斗图形评估出版偏差.
主要成果:
- 分析包括126名儿童 (64名在VL组,62名在SVS组).
- 在轴长缩短 (0.659 ± 0.184) 和 SER 减少 (0.669 ± 0.188) 方面,VL 显示出显著的效应大小.
- 还观察到视敏度 (VA) 的改善,综合效应大小为0.082 ± 0.171.1.
结论:
- 紫光 (VL) 传输眼镜在治疗儿童近视方面是有效的.
- VL治疗导致显著的轴缩短,减少SER,并改善VA.
- 需要进一步的研究来评估VL治疗的潜在长期反弹效应.
相关概念视频
01:22Photoreceptors and Visual Pathways
5.7K
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,...
5.7K
01:16Focusing 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
01:02Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview
2.5K
Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material, molecules absorb light depending on the energy required for...
2.5K
01:32UV–Vis Spectroscopy of Conjugated Systems
6.9K
Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
One of the factors influencing λmax is the extent...
One of the factors influencing λmax is the extent...
6.9K
01:24Color Vision
534
Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.
534