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相关概念视频

Focusing of Light in the Eye01:16

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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...
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It is essential to understand the difference between chiral and achiral interactions and the implications thereof in optical activity and their applications. Just as our feet, which are chiral, interact uniquely with chiral objects, such as a pair of shoes, but identically with achiral socks, enantiomers of a molecule exhibit different properties only when they interact with other chiral media. An example of a significant implication from this facet is the phenomenon known as optical activity,...
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相关实验视频

Updated: Jan 14, 2026

In vivo Structural Assessments of Ocular Disease in Rodent Models using Optical Coherence Tomography
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在近视无视度的近视无视度的三维冠状体参数差异.

Qiujian Zhu1, Xiaoying Xing2, Lie Ma1

  • 1Department of Ophthalmology, Lixiang Eye Hospital of Soochow University, Suzhou, China.

BMC ophthalmology
|October 17, 2025
PubMed
概括
此摘要是机器生成的。

三维冠状腺指标,如冠状腺血管体积 (CVV) 和冠状腺流层体积 (CSV),随着近视的严重程度而降低. 鼻特别容易受到轴延长的影响,这表明近视评估中的成像潜力.

关键词:
冠状管管体的体积体积.冠状血管的血管体积.近视异视无视症 (简称myopic anisometropia) 是一种近视的疾病.扫描源 OCT 的来源.三维冠状动脉血管度指数

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Determining Gender-Based Differences in Retinal and Choroidal Thickness in Underweight Individuals via Swept-Source Optical Coherence Tomography
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科学领域:

  • 眼科医生 眼科 眼科
  • 医疗成像医学成像
  • 视网膜研究 视网膜研究

背景情况:

  • 近视无视度呈现不同程度的眼睛之间的折射误差.
  • 了解状结构变化对于近视管理至关重要.
  • 定量3D胆道参数需要对不同近视的同眼进行比较.

研究的目的:

  • 量化比较近视无视的个体同眼中的3D胆道参数.
  • 为了评估胆道参数和球体等价值 (△SE) 和轴长 (△AL) 的整眼差异之间的相关性.
  • 为了评估区域性胆道变异和视网膜血管密度与异质严重程度的关系.

主要方法:

  • 对102名参与者 (204只眼睛) 进行了回顾性横截面研究,这些参与者患有低度,中度和高度的异观度差.
  • 使用扫描源光学连贯断层扫描 (SS-OCT) 测量3D胆道血管体积 (CVV),胆道层体积 (CSV) 和3D胆道血管度指数 (3D-CVI).
  • 对视网膜血管密度 (VD) 和区域差异的分析.

主要成果:

  • 显著降低CVV和CSV在所有群体中更近视的眼睛,最明显的是在高异比眼睛.
  • 在鼻腔区域发现的CVV/CSV和SE/AL整眼差异之间的最强相关性 (系数高达0.403,P<.001).
  • 在高无透视群体中更近视的眼睛中,视网膜VD升高表明了补偿性的微血管变化.

结论:

  • 三维胆道指标 (CVV,CSV) 有效地反映了近视的严重程度.
  • 鼻腔冠状腺对轴延长的脆弱性增加.
  • 体积计胆道成像显示了评估近视结构变化的潜力;需要进行纵向研究.