European Archives of Oto-Rhino-Laryngology

, Volume 271, Issue 2, pp 407–410 | Cite as

A randomised comparison between an inexpensive, general-purpose headlight and a purpose-built surgical headlight on users’ visual acuity and colour vision

  • I. StreetEmail author
  • M. Sayles
  • M. Nistor
  • A. R. McRae


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.


Physical examination Lighting Visual acuity 



The authors performed this study with no outside source of funding.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.ENT DepartmentLincoln County HospitalLincolnUK

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