optometer[äp täm′ət ər]
optometer definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
an instrument for determining error in the refractive power of the eye
Origin: see optic and amp; -meter
optometer - Medical Definition
An instrument for determining the refraction of the eye.