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A person is to be fitted with bifocals. She can
see clearly when the object is between 32 cm
and 2.1 m from the eye.
The upper portions
of the bifocals should be designed to enable her to see distant objects clearly. What power should they have? Answer I’m units of diopters
The lower portions of the bifocals should en-
able her to see objects comfortably at 25 cm.
What power should they have?
Answer in units of diopters.
Transcribed Image Text:Far vision
Near vision
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