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 Post subject: Police officers vision unacceptable after refractive surgery
PostPosted: Sat Mar 03, 2007 3:02 pm 
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http://www3.interscience.wiley.com/cgi- ... 9/ABSTRACT

American Journal of Industrial Medicine
November, 2006

Visual function of police officers who have undergone refractive surgery

Jeffery K. Hovis, OD, PhD *, Shankaran Ramaswamy, BSc
School of Optometry, University of Waterloo, Waterloo, Ontario, Canada

email: Jeffery K. Hovis (jhovis@uwaterloo.ca)

*Correspondence to Jeffery K. Hovis, University of Waterloo, School of Optometry, Waterloo, ON N2L 3G1, Canada.

Funded by:
Constable Selection System of the Ontario Ministry of Community Safety and Correctional Service

Abstract

Introduction
The visual acuity and contrast sensitivity of police recruits and officers was evaluated in both normal and dim illumination conditions to determine whether officers who have had refractive surgery have compromised night vision.

Methods
The control group consisted of 76 officers and recruits who have not had refractive surgery and the refractive surgery group consisted of 22 officers and recruits who had refractive surgery. Visual acuity and contrast sensitivity were measured under both room illumination and dim illumination. The room illumination test series included high contrast acuity, low contrast acuity and Pelli-Robson contrast sensitivity. The dim illumination test series included high contrast acuity, low contrast acuity, Pelli-Robson contrast sensitivity, license plate number acuity (with and without glare) and the Mesotest.

Results
The general findings were that the refractive surgery group had lower acuity scores on low contrast targets in both room and dim light levels along with a reduction in the Mesotest scores with a glare source compared to the control group.

Conclusions
Although refractive surgery police recruits and officers had reduced performance on some vision tests, these reductions were small and it is unlikely that their performance on vision related tasks would be compromised, on average. The major concern is the small number of refractive surgery candidates whose results were well outside the range of the non-surgical candidates. Their vision may be unacceptable for policing.

Am. J. Ind. Med. 49:885-894, 2006. ? 2006 Wiley-Liss, Inc.

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