Problem: Ellen wears eyeglasses with the prescription -1.0D. What is her far point without the glasses?

FREE Expert Solution

Power of a lens:

D=1f

We'll substitute for 1/f in the lens equation with D.

Power of the naked eye:

1si+1so=D0

Power of the eye when a correction lens is used:

1si=D0+D

The remote point so goes to infinity, thus 1/so becomes zero.

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Problem Details

Ellen wears eyeglasses with the prescription -1.0D. What is her far point without the glasses?

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