Department of Optometry and Vision Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia.
Eye Contact Lens. 2014 Jan;40(1):28-36. doi: 10.1097/ICL.0000000000000007.
To evaluate the ultraviolet (UV) transmittance spectra of different contact lenses and assess the effect of wear on UV transmittance values and ocular protection factor (PF).
Transmittance in the UV range (200-400 nm) of 216 contact lenses was measured before and after wear, using a spectrophotometer. The contact lenses used were ACUVUE TruEye, ACUVUE MOIST, ACUVUE OASYS, ACUVUE 2, ACUVUE DEFINE, DAILIES AquaComfort Plus, AIR OPTIX for astigmatism, FreshLook ONE-DAY lens, and Neo Cosmo.
This study indicates that the following contact lenses transmitted less than the American National Standards Institute (ANSI) of 5% or less of UVB: ACUVUE DEFINE, ACUVUE MOIST, ACUVUE 2, ACUVUE TruEye, and ACUVUE OASYS. All lenses also met the ANSI standard of less than 30% transmittance of UVA except for AquaComfort Plus, AIR OPTIX for astigmatism, and Neo Cosmo. FreshLook meets the UVA transmission standard but fell short of the UVB transmission standard by 3%. FreshLook and ACUVUE MOIST had the highest calculated PF (3.9) of the hydrogel group and were unaffected after wear. Of the silicone-hydrogels (SiHs), the PF for AIR OPTIX for astigmatism was the highest (10.6) before wear and increased after wear to a PF of 13.3. The results also show that, for the UVC region, significant differences exist in transmittance values before and after wear of all SiH lenses and all hydrogel lenses, except for Neo Cosmo. FreshLook and Neo Cosmo were the only lenses that showed no statistically significant differences in the UVA transmittance after wear.
Ultraviolet-blocking contact lenses were effective in blocking ultraviolet radiation to safe levels recommended by ANSI, whereas non-UV blockers such as AquaComfort Plus and AIR OPTIX for astigmatism also showed UV-attenuation capabilities greater than the values previously reported. The Neo Cosmo contact lens transmitted greater than 86% UVB and 89% UVA, making it unsuitable for UV protection seekers. Transmission is modified after contact lens wear in almost all lenses but more so in the SiH lenses, probably because of the formation of biofilms on the lens surface.
评估不同接触镜的紫外线（UV）透过率光谱，并评估佩戴对 UV 透过率值和眼部保护因子（PF）的影响。
使用分光光度计测量 216 片接触镜在佩戴前后在 UV 范围内（200-400nm）的透过率。使用的接触镜包括 ACUVUE TruEye、ACUVUE MOIST、ACUVUE OASYS、ACUVUE 2、ACUVUE DEFINE、DAILIES AquaComfort Plus、AIR OPTIX for astigmatism、FreshLook ONE-DAY 镜片和 Neo Cosmo。
本研究表明，以下接触镜的 UVB 透过率低于美国国家标准协会（ANSI）的 5%或以下：ACUVUE DEFINE、ACUVUE MOIST、ACUVUE 2、ACUVUE TruEye 和 ACUVUE OASYS。除了 AquaComfort Plus、AIR OPTIX for astigmatism 和 Neo Cosmo 之外，所有镜片也符合 ANSI 标准，即 UVA 透过率低于 30%。FreshLook 符合 UVA 传输标准，但 UVB 传输标准相差 3%。FreshLook 和 ACUVUE MOIST 在水凝胶组中的计算 PF（3.9）最高，佩戴后不受影响。在硅水凝胶（SiH）中，AIR OPTIX for astigmatism 的 PF 最高（10.6），佩戴前为 10.6，佩戴后增加到 13.3。结果还表明，对于 UVC 区域，除了 Neo Cosmo 之外，所有 SiH 镜片和所有水凝胶镜片在佩戴前后的透过率值存在显著差异。佩戴后，FreshLook 和 Neo Cosmo 是唯一在 UVA 透过率方面没有统计学差异的镜片。
紫外线阻断接触镜能有效将紫外线辐射阻断到符合美国国家标准协会推荐的安全水平，而非紫外线阻断剂，如 AquaComfort Plus 和 AIR OPTIX for astigmatism，也显示出大于先前报道的紫外线衰减能力。Neo Cosmo 接触镜的 UVB 透过率大于 86%，UVA 透过率大于 89%，不适合寻求紫外线保护的人。几乎所有镜片在佩戴后都会改变透过率，但 SiH 镜片变化更大，可能是因为镜片表面形成了生物膜。
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