An eyeball of a person is 2.10 cm from the cornea to the retina. A book held 30 cm from his eyes produces an image 2.26 cm from the entrance to the image location. What is one surgical way to correct the farsighted vision of the person? Increase the curvature of the cornea, thus reducing the focal length of the eyes optics system. Open the iris wider to allow more light to enter. Cause the ciliary muscle to stretch the lens so it becomes thinner. Reduce the curvature of the cornea, thus increasing the focal length of the eyes optics system.

University Physics Volume 3
17th Edition
ISBN:9781938168185
Author:William Moebs, Jeff Sanny
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Chapter2: Geometric Optics And Image Formation
Section: Chapter Questions
Problem 21CQ: It has become common to replace the cataract-clouded lens of the eye with an internal lens. This...
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In farsighted people, an object held at the normal near point
of the eye (about 25-50 cm from the eye) forms an image
behind the retina (Figure 2). Increasing the curvature of the
cornea causes rays from near objects to produce an image
on the retina. Conductive keratoplasty (CK) can increase
the curvature of the cornea to correct farsightedness. In
CK, a tiny probe emits radio waves in a circular pattern on
the outside of the cornea. Exposure to radio waves causes
shrinking in the ring around the cornea, which acts like a
constrictive band, increasing the overall curvature of the
cornea.
Transcribed Image Text:In farsighted people, an object held at the normal near point of the eye (about 25-50 cm from the eye) forms an image behind the retina (Figure 2). Increasing the curvature of the cornea causes rays from near objects to produce an image on the retina. Conductive keratoplasty (CK) can increase the curvature of the cornea to correct farsightedness. In CK, a tiny probe emits radio waves in a circular pattern on the outside of the cornea. Exposure to radio waves causes shrinking in the ring around the cornea, which acts like a constrictive band, increasing the overall curvature of the cornea.
An eyeball of a person is 2.10 cm from the cornea to the retina. A book held 30 cm from his eyes produces an image 2.26 cm from the
entrance to the image location. What is one surgical way to correct the farsighted vision of the person?
O Increase the curvature of the cornea, thus reducing the focal length of the eyes optics system.
O Open the iris wider to allow more light to enter.
Cause the ciliary muscle to stretch the lens so it becomes thinner.
O Reduce the curvature of the cornea, thus increasing the focal length of the eyes optics system.
Transcribed Image Text:An eyeball of a person is 2.10 cm from the cornea to the retina. A book held 30 cm from his eyes produces an image 2.26 cm from the entrance to the image location. What is one surgical way to correct the farsighted vision of the person? O Increase the curvature of the cornea, thus reducing the focal length of the eyes optics system. O Open the iris wider to allow more light to enter. Cause the ciliary muscle to stretch the lens so it becomes thinner. O Reduce the curvature of the cornea, thus increasing the focal length of the eyes optics system.
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