A farsighted person buys a pair of glasses to correct her farsightedness. Describe the main symptom of farsightedness and the type of lens that corrects it. Select one: a. Farsighted people cannot focus on objects that are far away, but they can see nearby objects easily. A convex lens is used to correct this. b. Farsighted people cannot focus on objects that are close up, but they can see far-off objects easily. A concave lens is used to correct this. c. Farsighted people cannot focus on objects that are close up, but they can see distant objects easily. A convex lens is used to correct this. d. Farsighted people cannot focus on objects that are either close up or far away. A concave lens is used to correct this.
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Farsighted people have difficulty focusing on objects that are close up, but they can see distant objects easily. Show more…
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A farsighted eye is corrected by placing a converging lens in front of the eye. The lens will create a virtual image that is located at the near point (the closest an object can be and still be in focus) of the viewer when the object is held at a comfortable distance, usually taken to be 25.0 cm. If a person has a near point of 53.5 cm, what power reading glasses should be prescribed to treat this hyperopia? Assume that the distance from the eye to the lens is negligible. power: diopters
Suman K.
Medical A farsighted eye is corrected by placing a converging lens in front of the eye. The lens will create a virtual image that is located at the near point (the closest an object can be and still be in focus) of the viewer when the object is held at a comfortable distance (usually taken to be $25 \mathrm{~cm}$ ). If a person has a near point of $75 \mathrm{~cm}$, what power reading glasses should be prescribed to treat this hyperopia? Example 24-6
$\cdot$ A person can see clearly up close, but cannot focus on objects beyond 75.0 $\mathrm{cm}$ . She opts for contact lenses to correct her vision. (a) Is she nearsighted or farsighted? (b) What type of lens (converging or diverging) is needed? (b) What type vision? (c) What focal-length contact lens is needed, and what is its power in diopters?
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