One of the inevitable consequences of aging is a decrease in the flexibility of the lens. This leads to the farsighted condition called presbyopia (elder eye). Almost every aging human will experience it to some extent. However, for the myopic person, at some point, it is possible that far vision will be limited by a subpar far point and near vision will be hampered by an expanding near point. One solution is to wear bifocal lenses that are diverging in the upper half to correct the nearsightedness and converging in the lower half to correct the farsightedness. Suppose one such individual asks for your help. The patient complains that he can't see far enough to safely drive (his far point is 132 cm) and he can't read the font of his smart phone without holding it beyond arm's length (his near point is 89 cm)! Prescribe the bifocals that will correct the visual issues for your patient. 1) Calculate the power of the upper half of the bifocals. (Express your answer to three significant figures.) diopters

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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One of the inevitable consequences of aging is a decrease in the
flexibility of the lens. This leads to the farsighted condition called
presbyopia (elder eye). Almost every aging human will experience it
to some extent. However, for the myopic person, at some point, it is
possible that far vision will be limited by a subpar far point and near
vision will be hampered by an expanding near point. One solution is
to wear bifocal lenses that are diverging in the upper half to correct
the nearsightedness and converging in the lower half to correct the
farsightedness.
Suppose one such individual asks for your help. The patient
complains that he can't see far enough to safely drive (his far point
is 132 cm) and he can't read the font of his smart phone without
holding it beyond arm's length (his near point is 89 cm)! Prescribe
the bifocals that will correct the visual issues for your patient.
1) Calculate the power of the upper half of the bifocals. (Express
your answer to three significant figures.)
Submit
diopters
2) Calculate the power of the lower half of the bifocals. (Express
your answer to three significant figures.)
Submit
diopters
Transcribed Image Text:One of the inevitable consequences of aging is a decrease in the flexibility of the lens. This leads to the farsighted condition called presbyopia (elder eye). Almost every aging human will experience it to some extent. However, for the myopic person, at some point, it is possible that far vision will be limited by a subpar far point and near vision will be hampered by an expanding near point. One solution is to wear bifocal lenses that are diverging in the upper half to correct the nearsightedness and converging in the lower half to correct the farsightedness. Suppose one such individual asks for your help. The patient complains that he can't see far enough to safely drive (his far point is 132 cm) and he can't read the font of his smart phone without holding it beyond arm's length (his near point is 89 cm)! Prescribe the bifocals that will correct the visual issues for your patient. 1) Calculate the power of the upper half of the bifocals. (Express your answer to three significant figures.) Submit diopters 2) Calculate the power of the lower half of the bifocals. (Express your answer to three significant figures.) Submit diopters
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