For information contact: Facts On File, Inc. An imprint of Infobase Publishing, Inc. 132 West 31st Street New York NY 10001 Library of Congress Cataloging-in-Publication Data Guiley, Rosemary. The encyclopedia of demons and demonology / Rosemary Ellen Guiley ; foreword by John Zafï¬s. p. cm.
Optometrists dilate a person's eyes so they can see the inside and back of the eyes. An eye exam should be performed annually. An ophthalmologist examines a patient. Normally, a person's pupils contract when light is bright. Routine eye exams are painless and can help detect vision or eye problems early.
During a traditional eye exam, an eye doctor dilates your eyes with special eyedrops and then checks your retinas for abnormalities using tools such as an ophthalmoscope â a lighted magnifying instrument. During a laser retina scan, such as Optomap, your eyes may or may not be dilated.