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.
What causes a cat's eye to dilate? Answer Wiki. Eye dilation, of cats and other animals, including humans, is a reaction caused by low levels of light. The reason for the enlarging of the pupil is to allow more light to enter the eye which enables better sight in darker conditions. The pupil is like the aperture of a camera lens, the wider it is, the more light can enter, like a small window. In lighter conditions, the pupil becomes smaller to protect the inner eye from excess light. There are also some studies around how being excited or attracted to someone/something can make the pupils dilate.