Document Detail


Intercollegiate usage schedule and the impact resistance of used football helmet faceshields.
MedLine Citation:
PMID:  21524598     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
PURPOSE: Although new polycarbonate helmet faceshields can withstand impacts exceeding forces of 2,400 N, repeated impacts and ultraviolet radiation degrade the structural integrity. In this study, the impact resistances of unused, solar-radiated, and of game-used faceshields were analyzed. Also, Division 1 National Collegiate Athletic Association football programs were surveyed concerning their faceshield practices.
METHODS: Impact resistance was tested by impacting faceshields with baseballs at velocities exceeding 67.1 m/s. Twenty-four new faceshields were exposed to southern daylight, 3 hours per day for 3 months before testing. Subsequent testing was performed on 60 game-used faceshields. Additionally, a faceshield utilization survey was distributed to 117 college programs.
RESULTS: Solar-irradiated shields did not fail at maximum test velocity. The survivability of nonimpacted shields was greater than game-worn shields (P = 0.0003). Fifty-nine surveys were returned with 58 programs reporting faceshield use. Approximately 21 players per program use a faceshield. The main reason reported for use was aesthetic. Only 21% of reporting programs require a faceshield for players with reduced visual acuity in 1 eye.
CONCLUSION: Faceshields lose impact resistance with typical use. Programs should incorporate a policy for replacement and require that players with reduced vision in at least 1 eye wear a faceshield.
Authors:
Aaron B Zimmerman; Gregory W Good; W Randy McLaughlin; Steven E Katz
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Optometry (St. Louis, Mo.)     Volume:  82     ISSN:  1558-1527     ISO Abbreviation:  Optometry     Publication Date:  2011 May 
Date Detail:
Created Date:  2011-04-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100912421     Medline TA:  Optometry     Country:  United States    
Other Details:
Languages:  eng     Pagination:  274-83     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 American Optometric Association. Published by Elsevier Inc. All rights reserved.
Affiliation:
The Ohio State University College of Optometry, Columbus.
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