ENT Department, Lincoln County Hospital, Greetwell Road, Lincolnshire, Lincoln, LN2 5QY, UK,
Eur Arch Otorhinolaryngol. 2014 Feb;271(2):407-10. doi: 10.1007/s00405-013-2586-x. Epub 2013 Jun 9.
To determine if there are any differences in near visual acuity and colour vision between an inexpensive general-purpose light emitting diode (LED) headlight and a purpose-built surgical LED headlight. A prospective study was conducted sequentially comparing near visual acuity and colour vision, the headlights being tested in random order, in a testing room with a constant minimal amount of background light. The participants were NHS employee volunteers, with self-declared normal (or corrected) vision, working in occupations requiring full literacy. For visual acuity, outcome was measured by recording the smallest font legible when using each headlight when the subject read a near visual acuity test card. For colour vision, the outcome was passing or failing the Ishihara test. There was no statistically significant difference between the general-purpose and the purpose-built headlights in users' near visual acuity or colour vision.
为了确定一种廉价的通用发光二极管（LED）头灯和一种专用手术 LED 头灯在近视力和色觉方面是否存在差异，进行了一项前瞻性研究，该研究顺序比较了近视力和色觉，头灯以随机顺序在一个测试室中进行测试，该测试室具有恒定的最小背景光量。参与者是 NHS 员工志愿者，他们自报视力正常（或矫正），从事需要完全读写能力的职业。对于视力，通过记录当主体阅读近视力测试卡时使用每个头灯时可识别的最小字体来测量结果。对于色觉，结果是通过或未通过石原测试。在用户的近视力或色觉方面，通用头灯和专用头灯之间没有统计学上的显著差异。
