As a treatment for cataracts (a cloudiness of the lens of the eye),the natural lens is removed and a plastic lens is implanted.After this is done a person can see distant objects clearly,but he cannot accommodate to focus on nearby objects.If such a person wanted to read a book at a distance of 25 cm,he would have to wear contact lenses having a diopter power of
A)+2.78 diopters.
B)+3.33 diopters.
C)-1.78 diopters.
D)+4.00 diopters.
E)-4.00 diopters.

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The Answer of As a treatment for cataracts (a cloudiness of the lens of the eye),the natural lens is removed and a plastic lens is implanted.After this is done a person can see distant objects clearly,but he cannot accommodate to focus on nearby objects.If such a person wanted to read a book at a distance of 25 cm,he would have to wear contact lenses having a diopter power of
A)+2.78 diopters.
B)+3.33 diopters.
C)-1.78 diopters.
D)+4.00 diopters.
E)-4.00 diopters.

As a Treatment for Cataracts (A Cloudiness of the Lens