VISUAL ERGONOMICS HANDBOOK

VISUAL ERGONOMICS HANDBOOK

Ergonomics

Many of our oldest and wisest sayings deal with the eyes. That’s probably
because vision is our primary connection with the world. We use our eyes
to interact with our environment in more than a million ways every second.
The eyes really are an extension of the brain and a direct link between our
environment and our minds. More than 80% of our learning comes from our
vision, which indicates how important our sense of sight is in our daily lives.
The process of vision begins with visible light — a portion of the radiation
spectrum that stimulates the nerve endings in the retina. The eyes can sense
about 10 million gradations of light and about 7 million different shades of
color. The retina is about the size of a postage stamp and is made up of about
130 million light-sensitive cells. It captures light and transforms it into nerve
impulses, and it can form, dissolve, and create a new image every tenth of
a second.

EDITED BY JEFFREY ANSHEL

www.taylorandfrancis.com
www.crcpress.com

CRC Press, Taylor & Francis Group, LLC

2005

Herb Berkwits, M.E.E.
James Sheedy, O.D., Ph.D.
Sharon M. Middendorf
Carolyn M. Sommerich, Ph.D.
Stephen L. Glasser, O.D., FAAO
Bernard R. Blais, M.D., FACOEM, FAAO, FACS
Alan Hedge, Ph.D.
Maurice Oxenburgh, B.Sc., Ph.D., FESA
Pepe Marlow, B.App.Sc., M.Com., MHFESA

English