An Evaluation of Contender Helmets for Visual Obstruction and Preliminary Validation of a Visual Obstruction Measuring Tool

Abstract

The aim of this study was to (1) use a headform perimeter to evaluate contender army helmets for visual interference; and (2) determine the effectiveness and validity of using the headform perimeter to measure visual interference compared to using human subjects. A headform was made in-house to be used with a standard Goldmann perimeter. The head form perimeter was used to evaluate the six contender helmets for visual obstructions, by measuring loss of field of view (FOV). In a separate study, human subjects FOV measurements were obtained with the same Goldmann perimeter. Subjects' loss of FOV while wearing various helmets were measured. The results showed that: (1) all brimmed helmets caused significant reductions of FOV when compared with baseline measurements (no helmet); (2) brimless helmets (British and Israeli) did not cause any significant reduction of FOV; and (3) the headform FOV data were consistent with subjects' FOV measurements, for three of the six test helmets.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1997
Accession Number
ADA337436

Entities

People

  • Y. Shek

Organizations

  • Defence Research and Development Canada

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Abstracts
  • Data Analysis
  • Engineering
  • Executives
  • Eye
  • Eye Movements
  • Human Factors Engineering
  • Light Sources
  • Measurement
  • National Security
  • Peripheral Vision
  • Procurement
  • Security
  • Standardization
  • Standards
  • Test And Evaluation
  • Test Methods

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  • Human-Computer Interaction (HCI).
  • Military Engineering.