Wu Yvonne T, Tran Jess, Truong Michelle, Harmis Najat, Zhu Hua, Stapleton Fiona
Brien Holden Vision Institute, Sydney, New South Wales, Australia.
Optom Vis Sci. 2011 Apr;88(4):456-60. doi: 10.1097/OPX.0b013e31820f15a6.
Wearing goggles over contact lenses while swimming is often recommended by eye care professionals. Limited data are available to assess this recommendation. The purpose of this study was to examine whether wearing goggles while swimming limits bacterial colonization on contact lenses and whether the type of lens worn affects contamination rates.
Twenty-three subjects underwent two swimming sessions at an ocean (salt water) pool (Maroubra beach Rock Pool, Sydney, Australia). Silicone hydrogel (Ciba Focus Night and Day) or hydrogel lenses (Ciba Focus Daily) were inserted into subjects' eyes before 30 min of swimming sessions, and subjects used modified goggles to mimic goggled and non-goggled conditions. At the end of each session, lenses were collected for microbial investigation. Viable bacterial colonies were classified as gram positive and gram negative and enumerated. The level of bacterial colonization on contact lenses between goggled and non-goggled conditions and between the two lens materials were compared.
The range of colony forming units recovered from goggled lenses were 0 to 930 compared with 0 to 1210 on non-goggled lenses. The majority of subjects (16/23) had more microorganisms in the non-goggled condition than when wearing goggles (p = 0.03). Gram negative organisms were found in three non-goggled lenses. No significant difference was shown in the number of bacteria isolated from silicone hydrogel and hydrogel lenses (p > 0.6) irrespective of wearing goggles. Water samples had consistently higher numbers of bacterial counts than those adhered to the lenses; however, no association was found between the number of bacteria in the water sample and those found on the contact lenses.
Consistently, fewer bacterial colonies were found on the goggled contact lens, thus suggesting goggles offer some protection against bacterial colonization of contact lenses while swimming. These data would support the recommendation encouraging lens wearers to use goggles while swimming.
眼科护理专业人员通常建议在游泳时佩戴隐形眼镜外再戴护目镜。但用于评估该建议的数据有限。本研究的目的是检查游泳时佩戴护目镜是否会限制隐形眼镜上的细菌定植，以及所佩戴镜片的类型是否会影响污染率。
23名受试者在一个海水泳池（澳大利亚悉尼马鲁布拉海滩岩石泳池）进行了两次游泳活动。在每次游泳活动前30分钟，将硅水凝胶镜片（博士伦纯视日夜型）或水凝胶镜片（博士伦纯视日抛型）插入受试者眼中，受试者使用改良后的护目镜来模拟佩戴护目镜和未佩戴护目镜的情况。每次活动结束时，收集镜片进行微生物检测。将活细菌菌落分为革兰氏阳性菌和革兰氏阴性菌并计数。比较佩戴护目镜和未佩戴护目镜情况下以及两种镜片材料之间隐形眼镜上的细菌定植水平。
佩戴护目镜的镜片回收的菌落形成单位范围为0至930，而未佩戴护目镜的镜片为0至1210。大多数受试者（16/23）在未佩戴护目镜时比佩戴护目镜时的微生物更多（p = 0.03）。在3个未佩戴护目镜的镜片中发现了革兰氏阴性菌。无论是否佩戴护目镜，从硅水凝胶镜片和水凝胶镜片中分离出的细菌数量均无显著差异（p > 0.6）。水样中的细菌计数始终高于附着在镜片上的细菌计数；然而，在水样中的细菌数量与隐形眼镜上发现的细菌数量之间未发现关联。
一直以来，佩戴护目镜的隐形眼镜上发现的细菌菌落较少，因此表明护目镜在游泳时对隐形眼镜的细菌定植提供了一定的保护。这些数据将支持鼓励隐形眼镜佩戴者在游泳时使用护目镜的建议。
