Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 28 - Reading Check Questions (Comprehension): 16

Answer

They are relatively thin.

Work Step by Step

If the eyeglasses are made with "high index of refraction" glass, refraction is stronger at the surfaces when light enters or exits the glass from air. This means the light bends more, the curvature of the lenses can be less severe, and the lenses can be made thinner. This is discussed on page 526.
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