Department of Applied Physics (Optometry Group), University of Santiago de Compostela, Santiago de Compostela, Spain.
Ophthalmic Physiol Opt. 2010 May;30(3):289-97. doi: 10.1111/j.1475-1313.2010.00712.x.
The aim of this study was to characterize, qualitatively and quantitatively, the surface morphology of four unworn conventional hydrogel contact lenses (Omafilcon, Hioxifilcon-based, Nefilcon A and Ocufilcon B) by White Light Optical Profiling (WLOP). WLOP is an ideal technique for sampling larger areas as well as for higher measurement speed compared with other topography techniques used in contact lens studies.
Surface roughness was assessed by WLOP in the Vertical Scanning Mode, with a Wyko NT1100, which is a non-contact optical profiling system that provides high vertical resolution. Representative roughness parameters, the Average Roughness (R(a)), Root-mean-square Roughness (R(ms)), and Maximum Roughness (R(max)), for areas of 625, 2500, 10829 and 67 646 microm(2) were calculated.
Higher R(a), R(ms) and R(max) values were obtained for larger areas in all lenses. Daily disposable contact lenses (Nefilcon A and Ocufilcon B) presented the highest R(a), R(ms) and R(max) values, the larger changes in these parameters becoming apparent with the increase in the measured area. Differences between lenses were less obvious when data from 625 and 2500 microm(2) area were compared.
Daily disposable contact lenses showed the highest roughness surface. Analyzing larger areas might be adequate to detect differences between lenses in terms of surface characteristics, which may not be so obvious if smaller areas are studied.
本研究旨在通过白光形貌仪（WLOP）对四种未经磨损的常规水凝胶隐形眼镜（欧舒适、硅水凝胶基、水凝胶和纯视）进行定性和定量的表面形貌分析。与隐形眼镜研究中使用的其他形貌技术相比，WLOP 是一种用于采集更大面积和更高测量速度的理想技术。
采用 Wyko NT1100 非接触光学轮廓仪的垂直扫描模式对表面粗糙度进行 WLOP 评估，该系统具有较高的垂直分辨率。计算了 625、2500、10829 和 67646 微米 2 等四个面积的代表性粗糙度参数，包括平均粗糙度（R(a)）、均方根粗糙度（R(ms)）和最大粗糙度（R(max)）。
所有隐形眼镜的较大面积均获得了较高的 R(a)、R(ms)和 R(max)值。日戴型隐形眼镜（水凝胶和纯视）呈现出最高的 R(a)、R(ms)和 R(max)值，随着测量面积的增加，这些参数的变化更加明显。当比较 625 和 2500 微米 2 面积的数据时，镜片之间的差异不太明显。
日戴型隐形眼镜的表面粗糙度最高。分析较大的面积可能足以检测到镜片之间在表面特性方面的差异，如果研究较小的面积，则这些差异可能不那么明显。
