The fovea centralis (or fovea) is responsible for the sharp central vision that humans use for reading
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The fovea centralis (or fovea) is responsible for the sharp central vision that humans use for reading and other detail-oriented eyesight. The relative acuity of a human eye, which measures the sharpness of vision, is modeled by the function
where u (in degrees) is the angular deviation of the line of sight from the center of the fovea (see figure).
a. Graph R, for -15 ≤ u ≤ 15.
b. For what value of u is R maximized? What does this fact indicate about our eyesight?
c. For what values of u do we maintain at least 90% of our maximum relative acuity?
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a b This appears to have a maximum when ...View the full answer
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Related Book For 
Calculus Early Transcendentals
ISBN: 978-0321947345
2nd edition
Authors: William L. Briggs, Lyle Cochran, Bernard Gillett
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