From: "Meyer, Glenn" <gmeyer@trinity.edu>
To: "'hchan@kirkham.ewind.com'" <hchan@kirkham.ewind.com>
Subject: Stress and the visual system
____
Recently, a friend who deals with law enforcement training
asked me about the following from an article that deals with
stress related responses.
The article is at:
http://members.home.net/alienhand/Sympathetic_Nervous_System.htm
It deals with the effect of sympathetic nervous system on tunnel vision and
claims that
it is vasoconstriction in the retina that shut downs acuity, etc. I search
on Medline
and PsychLit and didn't find the author of the claim, Breedlove.
The article itself (not by a visual scientist) seems confused about the
distinction between
rod and cone functions.
So I am interested in the validity of this claim. Thanks.
Glenn
Glenn E. Meyer, Ph.D
Professor of Psychology
Department of Psychology
Trinity University
715 Stadium Drive
San Antonio, TX 78212
gmeyer@trinity.edu
210-999-8387 - office
210-999-8386 - fax
http://www.trinity.edu/gmeyer
PS - last year, I asked about the effect of blue light for lighting military
vehicles
in low light situations. I never posted the responses I received as I
decided to
spend the summer breaking my arm and ribs. Thanks for the replies. The gist
of the discussion was that blue light was used for the problem as red light
was
found to be aesthetical unpleasing and interferred with map and display
reading.
It certainly wasn't because of enhancement of scotopic vision. That claim
just wandering
into the pop disucssion from parts unknown. The problem is still a problem
as people don't
like red light and blue is not optimal at all for night vision but good for
some maps.
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