透镜和配合特征对硬膜透镜集中度的影响
Damien Fisher1, Michael J Collins1, Stephen J Vincent1
1Contact Lens and Visual Optics Laboratory, Queensland University of Technology, Optometry and Vision Science, Centre for Vision and Eye Research, Brisbane, Queensland, Australia.
概括
在90分钟内,状镜片的分散是稳定的. 较大的初始流体储深度显著增加了镜片的分散,特别是较低的,而镜片的厚度和窗体的影响最小.
科学领域:
- 眼科医生 眼科 眼科
- 视光学测量 视光学测量 视光学测量
- 生物医学工程 生物医学工程
背景情况:
- 状镜片对于管理复杂的眼睛表面疾病至关重要.
- 了解影响状镜片中心化的因素对于优化视觉结果和患者舒适度至关重要.
- 镜片的分散可以影响眼交换和氧气的传递性.
研究的目的:
- 调查中心流体储深度的变化,透镜厚度/质量和外围窗格如何影响状透镜的集中.
- 量化这些参数对透镜定位随时间推移的影响.
主要方法:
- 进行了重复测量实验,对10名健康成年人进行了90分钟的脑膜透镜测试.
- 系统地改变了中心流体储存库深度,镜片厚度和镜片质量.
- 评估了外围窗体的存在或不存在.
- 使用过度地形图的地图测量了状镜片的分散度.
主要成果:
- 状镜片的集中保持稳定,90分钟的平均变化小于0.10毫米.
- 增加的中央流体储深度导致了显著更大的时间 (0.17毫米) 和较低 (0.55毫米) 的分散.
- 镜片的厚度,质量和外围的添加并没有导致临床上显著的中心变化 (<0.10毫米).
- 中央液体储深度是透镜分散的最强预测因素 (62-73%的变化).
结论:
- 在短期的磨损过程中,状镜片的分散通常是稳定的.
- 较高的初始中央流体储深度是一个重要的因素,驱动着状镜片的分散,特别是在下部方向.
- 镜片厚度,质量或单个外围窗体的包含的修改在考虑液体储存库深度时对膜镜片的集中有微不足道的影响.
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