Head mirror versus headlight: Illumination, visual identification and visual acuity for otolaryngological examination

C. H. Lin, H. T. Hsu, P. Y. Chen, L. K. Huon, Y. Z. Lin, S. H. Hung

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Objective: To investigate and compare the performance of head mirrors and headlights during otolaryngological examination. Methods: The illuminance and illumination field of each device were measured and compared. Visual identification and visual acuity were also measured, in 13 medical students and 10 otolaryngology specialists. Results: The illuminance (mean ± standard deviation) of the LumiView, Kimscope 1 W and Kimscope 3 W headlights and a standard head mirror were 352.3 ± 9, 92.3 ± 4.5, 438 ± 15.7 and 68.3 ± 1.2 lux, respectively. The illumination field of the head mirror (mean ± standard deviation) was 348 ± 29.8 grids, significantly greater than that of the Kimscope 3 W headlight (183 ± 9.2 grids) (p = 0.0017). The student group showed no statistically significant difference between visual identification with the best headlight and the head mirror (score means ± standard deviations: 56.2 ± 9 and 53.3 ± 14.1, respectively; p = 0.3). The expert group scored significantly higher for visual identification with head mirrors versus headlights (59.7 ± 3.3 vs 55.2 ± 5.8, respectively; p = 0.0035), but showed no difference for visual acuity. Conclusion: Despite the advantages of headlight illumination, head mirrors provided better, shadow-free illumination. Despite no differences amongst students, head mirrors performed better than headlights in experienced hands.

Original languageEnglish
Pages (from-to)744-748
Number of pages5
JournalJournal of Laryngology and Otology
Volume127
Issue number8
DOIs
Publication statusPublished - 2013

Keywords

  • Diagnosis
  • Diagnostic Techniques And Procedures
  • Lighting
  • Otolaryngology
  • Physical Examination
  • Visual Acuity

ASJC Scopus subject areas

  • Otorhinolaryngology
  • Medicine(all)

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