As a Treatment for Cataracts (A Cloudiness of the Lens

question 30

Multiple Choice

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.