每天一次性软透镜的斜视深度和其他透镜参数变化,在室温 (20°C) 和眼睛温度 (34°C) 中测量
Mari J Fujimoto1, Eef van der Worp1, Beth Kinoshita1
1Pacific University College of Optometry, USA.
概括
每日一次性软隐形眼镜在眼睛上佩戴时,由于温度升高,直径和斜视深度会缩小. 含水量较高的镜头显示出更显著的参数变化.
科学领域:
- 眼科医生 眼科 眼科
- 眼镜测量是指眼睛的测量.
- 材料科学 材料科学 材料科学
背景情况:
- 隐形镜片的参数通常根据ISO标准在室温 (20°C) 测量.
- 在眼睛的条件涉及升高的温度 (大约34°C),这可能会影响镜头的行为.
- 了解软隐形眼镜的温度变化对于预测眼部适合和性能至关重要.
研究的目的:
- 量化每日一次性软式隐形眼镜 (DD SCL) 在从室温过渡到眼睛温度时的尺寸和曲率变化.
- 调查温度对关键隐形镜片参数的影响:斜视深度 (CL-SAG),底线曲线 (BC) 和总直径 (OAD).
主要方法:
- 分析了12个不同的球形DD SCL (标记功率-3.00 D).
- 镜头参数 (CL-SAG,BC,OAD) 在20°C和34°C均被测量.
- 一种基于OCT的光谱域仪器 (Optimec is830) 用于直接测量.
主要成果:
- 在34°C时,所有DD SCL都显示CL-SAG与20°C测量相比降低 (p < 0.001).
- 平均而言,在34°C测量的镜头显示出较小的OAD (p < 0.001) 和稍微的BC (p = 0.058).
- 含水量较高的材料显示了镜头参数更明显的变化.
结论:
- 软隐形镜片的参数从室温到眼睛温度显著变化.
- 所有经过测试的DD SCL在与室温测量相比,当平衡到眼睛温度时,其直径和CL-SAG都会缩小.
- 材料中的水含量是影响软隐形眼镜温度诱导参数转移的因素之一.
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