
To Explain: The cornea is the primary focusing element in the eye.

Explanation of Solution
Introduction:
The cornea is transparent part of the eye. It covers front portion of the eye.
The cornea refracts or bends light. It acts like a window. Due to higher refractive index, light bends more when it travels from air to cornea. It acts like a lens which focus the light at the focal point at the back side of eye.
Conclusion:
Thus, cornea is the primary focusing element in the eye.
Chapter 18 Solutions
Glencoe Physics: Principles and Problems, Student Edition
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