催膜脂质层厚度:测量技术,规范值和眼睛表面疾病的变化
Sandhya Esam1, Swati Singh2, Nagaraju Konda1
1School of Medical Sciences, University of Hyderabad, Hyderabad, India.
Current eye research
|April 2, 2025
概括
干眼疾病 (DED) 的脂质层厚度 (LLT) 差异很大,在健康和受影响的个体之间存在重叠值. 需要进一步的研究来澄清LLT.
科学领域:
- 眼科医生 眼科 眼科
- 眼睛表面疾病 眼睛表面疾病
- 生物医学成像技术 生物医学成像技术
背景情况:
- 眼膜的不稳定性是干眼疾病 (DED) 的关键因素.
- 眼膜的脂质层 (LLT),由梅博姆腺分泌,在眼睛表面的健康中起着至关重要的作用.
- 眼稳态,体积或脂质层完整性的破坏有助于DED的发病.
研究的目的:
- 审查目前测量脂质层厚度 (LLT) 的技术.
- 总结在眼睛表面疾病中观察到的规范性LLT值和变化.
- 评估LLT测量的临床实用性,用于诊断和管理DED.
主要方法:
- 使用PubMed,ScienceDirect和谷歌学者进行了全面的文献搜索.
- 关键词包括"膜脂质层厚度"",干眼病"",梅博姆腺功能障碍"和"干扰计".
- 审查了全文文章 (共236篇文章中的88篇) 以综合LLT测量技术和临床相关性的发现.
主要成果:
- 先进的成像技术 (LipiView,Oculus Keratograph 5M,Tearscope) 可以测量LLT,但不能互换.
- 正常的LLT范围从13到170nm,而DED患者显示的值从33到84nm,根据严重程度的变化.
- LLT与梅博姆腺表达能力和损失,眼膜断裂时间和眼模式相关;与年龄和性别的关联是冲突的.
结论:
- 健康和DED个体之间的LLT值的显著重叠限制了其对DED的诊断能力.
- 需要进一步研究在不同的环境条件和更大的患者队伍中对LLT变化的研究.
- 对LLT动态的更好理解可以改善DED的临床管理策略.
相关概念视频
01:23Ophthalmic Drug Delivery Systems
Ophthalmic drug delivery faces major limitations due to poor absorption across the corneal membrane. This process is primarily driven by diffusion and is influenced by two main factors: the physicochemical properties of the drug and tear drainage. Most ophthalmic drugs, such as pilocarpine, epinephrine, atropine, and local anesthetics, are weak bases. They are typically formulated at an acidic pH to enhance chemical stability. However, this leads to high ionization, reducing their ability to...
01:22Microbiome of the Eye
The human eye has a specialized microbiota that reflects its unique anatomical and immunological environment. This low-biomass microbial community predominantly colonizes the conjunctiva and eyelid margins, playing a vital role in ocular surface homeostasis and defense. Despite its proximity to the richly colonized facial skin, the ocular surface maintains a distinct microbial profile due to continuous mechanical and biochemical defense mechanisms.The conjunctival surface hosts fewer microbial...