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Optics far point question

  1. Oct 22, 2016 #1
    1. The problem statement, all variables and given/known data
    While carrying contact lenses of D=-2.00 diopters, a nearsighted person takes a vision test and finds that his/her far point is 10.0m
    a) what is the person's far point without contact lenses?
    b) what lens power is required to correct the myopia fully?

    2. Relevant equations
    1/f = 1/o + 1/i
    D=1/f
    3. The attempt at a solution
    This problem was for homework in our optics class, but I don't know how to start the problem. Its not like the usual problems i've been doing. Any help would be greatly appreciated.
     
  2. jcsd
  3. Oct 23, 2016 #2

    Simon Bridge

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    If you knew the far-point without correction, how would you determine the diopter value of the corrective lenses required?
    How does the position of the far-point depend on the lenses used?
     
  4. Oct 24, 2016 #3

    andrevdh

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    Do you know what the far point is?
     
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