Preliminary Evaluation of Four Low Light Shield Designs for the Ballistic Eyewear

L'Évaluation Préliminaire de Quatre Conceptions de Protection Légères Basses pour les Lunettes Balistiques


  1. Angel, H.A.
  2. Vilhena, P.G.S.
Corporate Authors
Defence R&D Canada - Toronto, Toronto ONT (CAN);Humansystems Inc, Guelph ONT (CAN)
A fifteen-day field trial was performed at Fort Benning, Georgia, to evaluate the acceptability of the four low light shields (LLS) Ballistic Eyewear (BEW). The Canadian Land Forces acquired ReVision Ballistic Protective Eyewear (BEW) for the LF as part of the Clothe the Soldier (CTS) project. Currently, the BEW are issued with only a clear and a solar lens. There are a number of other lenses available for the ReVision eyewear system including "blue blockers” or amber lenses. Blue blockers commonly are sunglasses with amber lenses that block blue light. Blocking out blue light can make objects appear clearer in some situations, and for soldiers, aid in target detection and identification. This trial was broken down into a controlled portion and an uncontrolled portion. Fourteen regular force infantry soldiers participated in the controlled portion while twenty-eight regular force infantry soldiers participated in the uncontrolled portion. The controlled group performed a battery of dynamic, task-focused HF tests in a repeated measures design to assess the LLS BEW system. Assessment of the BEW system followed a progressive testing approach from an initial vision performance test to dynamic discrete twilight live fire testing to finally dynamic military battle task testing. The progressive testing approach focused user experience so that participants could make a knowledgeable assessment of overall acceptability for all four of the low-light shields. Data collection included

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low light shield;ballistic eyewear;eye protection;amber lens;solar lens;ballistic sunglasses;twilight
Report Number
DRDC-TORONTO-CR-2005-209 — Contractor Report
Date of publication
01 Sep 2005
Number of Pages
Electronic Document(PDF)

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