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The closer an object is to the focal plane (in the case of the eye, the focal plane is the retina), the greater the required vergence to focus. So as an object is moved closer to the eye, an increasingly powerful lens is necessary to achieve a clear image.
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What are bificals more commonly known as?
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The sun and moon appear elliptical near the horizon due to?
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What are signs of farsightedness?
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refraction point
When eye focuses on near objects is the degree of refraction of light entering the eye increase or decreased?
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Why do cruise ship doors have two hinges near the top and one near the bottom?
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