The person's far point can be calculated from the relation:
, where P is the power of the lens of the eye, so is the object distance and si is the image distance.
Let's take the far point to be x and the distance at which the person is wearing glasses to be y.
We're told that the myopic person is wearing the glasses at 1.75 cm.
Therefore, y = 1.75 cm = 1.75 × 10-2 m
Repeat the previous problem for glasses that are 1.75 cm from the eyes.
Reference previous problem:
A myopic person sees that her contact lens prescription is -4.00 D. What is her far point?
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