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mikael mikael
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Posts: 12017
9 years ago
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 for example such a person wanted to read a book at a distance of 25 cm, he would have to wear eyeglasses whose diopter power was approximately 
A) +2.78 diopters 
B) +3.33 diopters 
C) -1.78 diopters 
D) +4.00 diopters 
E) -4.00 diopters 
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wrote...
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9 years ago
D) +4.00 diopters 
mikael Author
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9 years ago
Thank you.
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