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How does the power of a dry contact lens compare with its

College Physics | 1st Edition | ISBN: 9781938168000 | Authors: Paul Peter Urone, Roger Hinrichs ISBN: 9781938168000 42

Solution for problem 4CQ Chapter 26

College Physics | 1st Edition

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College Physics | 1st Edition | ISBN: 9781938168000 | Authors: Paul Peter Urone, Roger Hinrichs

College Physics | 1st Edition

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Problem 4CQ

Problem 4CQ

How does the power of a dry contact lens compare with its power when resting on the tear layer of the eye? Explain.

Step-by-Step Solution:
Step 1 of 3

Solution 4CQ

The combination of the lens and the tear film on the eye provides the total power of the contact lens or liquid lens power. A portion of the lens, surrounded by the peripheral fitting curves acts as the optical zone of the contact lenses.

The tear layer has less effect on contact lens power, if lens is in perfect alignment onto the cornea. The degree of clearance of the lens enables the tear film to have a power effect on cornea/tear/lens system. Inadequate watery layer in the tear film causes dry eyes. As such the contact lenses become uncomfortable to wear.

Step 2 of 3

Chapter 26, Problem 4CQ is Solved
Step 3 of 3

Textbook: College Physics
Edition: 1
Author: Paul Peter Urone, Roger Hinrichs
ISBN: 9781938168000

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How does the power of a dry contact lens compare with its