青光眼中神经带和视网膜神经纤维层的渐进性变化:基线值的影响和地板效应的影响
Ryo Tomita1, Brooklyn Rawlyk2, Glen P Sharpe1
1Department of Ophthalmology and Visual Sciences, Dalhousie University, Halifax, Nova Scotia, Canada.
Ophthalmology
|January 4, 2024
概括
青光眼损伤可能会影响视网膜神经纤维层厚度 (RNFLT) 和最小边缘宽度 (MRW) 的测量. RNFLT显示了较早的底部效应,表明视神经头部组织重塑的差异.
科学领域:
- 眼科医生 眼科 眼科
- 医疗成像医学成像
- 玻璃眼研究研究 玻璃眼研究
背景情况:
- 玻璃眼是一种渐进的视神经病变,其特点是视神经头部受损.
- 精确测量结构变化对于监测青光眼的进展至关重要.
- 光学连贯断层扫描 (OCT) 是评估视网膜神经纤维层厚度 (RNFLT) 和最小边缘宽度 (MRW) 的关键成像模式.
研究的目的:
- 为了调查青光眼患者的严重基线损伤是否会影响最小边缘宽度 (MRW) 的测量以及由于潜在的地板效应而发生的周边膜视网膜神经纤维层厚度 (RNFLT) 变化.
- 为了比较MRW和RNFLT随时间变化率与基线损伤严重程度的关系.
主要方法:
- 一项前性的纵向队列研究,涉及开角青光眼患者和健康对照组.
- 参与者每6个月进行一次OCT成像,至少5年.
- 基线MRW和RNFLT值被分类,回归分析评估了变化的大小和意义,随访被分为两个时期以检测衰减.
主要成果:
- 全球和部门MRW和RNFLT的显著变化被检测到在所有基线损伤水平在青光眼患者.
- 观察到变化较少的趋势,基线损伤增加.
- 与第一个相比,视网膜神经纤维层厚度 (RNFLT) 在第二次随访期间显示出更大的减弱 (更积极的斜率),这表明地板效应比MRW更早.
结论:
- 无论是MRW和RNFLT的变化都可检测到,即使在青光眼中出现严重的基线损伤.
- 观察到的RNFLT变化减弱表明,与MRW相比,地板效应更早.
- 这些发现表明,在RNFLT和MRW之间,视神经头部和视网膜周环膜上存在明显的组织重塑过程.
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