Research Group of Centre Universitari de la Visió, Optometry Department, Technical University of Catalonia, Catalonia, Spain.
Eye Contact Lens. 2011 Nov;37(6):359-64. doi: 10.1097/ICL.0b013e318232e431.
The aim of this study was to investigate the influence of eyelid and tear film attributes on the ability of a topography-based contact lens-fitting module to correctly predict rigid gas permeable (RGP) contact lens parameters leading to successful in situ final lens fitting in normal corneas.
A total of 28 healthy eyes with spherical refraction ranging from -2.00 to -6.00 D, refractive and anterior corneal astigmatism <-0.75 D and smooth keratometric mires were fitted with diagnostic trial tricurve RGP lenses as determined through simulated fluorescein pattern analysis. Modifications in the back optic zone radius (BOZR) and total diameter (TD) were implemented to the suggested parameters until a satisfactory fit was observed, whereupon the differences from the suggested parameters were recorded. Eyelid position, upper lid tonus, blinking completeness, tear film volume, and quality and corneal eccentricity were evaluated, and their relationship with the number of required parameter modifications was explored.
Eyelid position and tear meniscus height presented a statistically significant association with the number of parameter changes between simulated and final in situ fittings. In addition, although eyelid position influenced both BOZR (rho=0.436; P=0.020) and TD (rho=-0.398; P=0.036), tear meniscus height only prompted TD modifications (rho=0.435; P=0.021). No additional associations were discovered and, on examining the direction of the modifications, no clear tendency could be detected.
Eyelid position and tear meniscus height attributes, not taken into consideration by topography-based lens fitting software, influence RGP lens parameter selection.
本研究旨在探讨眼睑和泪膜特性对基于地形图的隐形眼镜适配模块的影响，该模块可正确预测硬性透气性隐形眼镜（RGP）的参数，从而在正常角膜中实现原位最终隐形眼镜适配。
共纳入 28 只健康眼，球镜屈光度范围为-2.00 至-6.00 D，等效球镜和前角膜散光<-0.75 D，角膜面像差规则。通过模拟荧光素图案分析确定，使用诊断性试戴三曲线 RGP 镜片进行适配。对建议参数的后光学区半径（BOZR）和总直径（TD）进行修改，直到观察到满意的适配，记录与建议参数的差异。评估眼睑位置、上眼睑张力、眨眼完整性、泪膜体积和质量以及角膜偏心率，并探讨其与所需参数修改数量的关系。
眼睑位置和泪膜新月形高度与模拟和原位最终适配之间的参数变化数量呈统计学显著关联。此外，尽管眼睑位置影响 BOZR（rho=0.436；P=0.020）和 TD（rho=-0.398；P=0.036），但只有泪膜新月形高度提示 TD 发生变化（rho=0.435；P=0.021）。未发现其他关联，并且在检查修改的方向时，未发现明显的趋势。
未被基于地形图的隐形眼镜适配软件考虑的眼睑位置和泪膜新月形高度等属性会影响 RGP 隐形眼镜参数的选择。
