A person needs a lens of power -4.5 d for correction of her vision.What kind of defect in vision the person is suffering from
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Hey mate!
With reference to the power of the lens, a person might be suffering from myopia (near sightedness) or hypermetropia (far sightedness).
If a person has been given a lens of power +1.5D, it means that the person needs converging power to achieve the normal refraction of sight. If a person needs converging power it means that the person is suffering from hypermetropia
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