Citek Karl, Torgersen Daniel L, Endres Jeffrey D, Rosenberg Robert R
Pacific University College of Optometry, Forest Grove, Oregon, USA.
Optometry. 2011 Sep;82(9):549-55. doi: 10.1016/j.optm.2011.07.012.
This study investigated prescription spectacles ordered from online vendors and delivered directly to the public for compliance with the optical tolerance and impact resistance requirements for eyewear dispensed in the United States.
Ten individuals ordered 2 pairs of spectacles from each of 10 of the most visited Internet vendors, totaling 200 eyewear orders. Spectacles ordered consisted of ranges of lens and frame materials, lens styles, and refractive corrections reflecting current distributions in the United States. Evaluations included measurement of sphere power, cylinder power and axis, add power (if indicated), horizontal prism imbalance, and impact testing.
We received and evaluated 154 pairs of spectacles, comprising 308 lenses. Several spectacles were provided incorrectly, such as single vision instead of multifocal and lens treatments added or omitted. In 28.6% of spectacles, at least 1 lens failed tolerance standards for at least 1 optical parameter, and in 22.7% of spectacles, at least 1 lens failed impact testing. Overall, 44.8% of spectacles failed at least 1 parameter of optical or impact testing.
Nearly half of prescription spectacles delivered directly by online vendors did not meet either the optical requirements of the patient's visual needs or the physical requirements for the patient's safety.
本研究调查了从在线供应商处订购并直接交付给公众的处方眼镜，以确定其是否符合美国所售眼镜的光学公差和抗冲击性要求。
10名受试者从10家访问量最大的互联网供应商处各订购了2副眼镜，共200份眼镜订单。所订购的眼镜包括各种镜片和镜架材料、镜片款式以及反映美国当前分布情况的屈光矫正。评估包括球镜度数、柱镜度数和轴位、附加度数（如有标注）、水平棱镜不平衡度测量以及冲击测试。
我们收到并评估了154副眼镜，共308片镜片。有几副眼镜提供错误，比如应为多焦点却提供了单焦点，以及添加或遗漏了镜片处理。在28.6%的眼镜中，至少有1片镜片的至少1项光学参数未达到公差标准，在22.7%的眼镜中，至少有1片镜片冲击测试未通过。总体而言，44.8%的眼镜至少有1项光学或冲击测试参数未通过。
由在线供应商直接交付的处方眼镜中，近一半既不符合患者视觉需求的光学要求，也不符合患者安全的物理要求。
