Question

A person with normal vision can focus on objects as close asafew centimeters from the eye up to objects infinitely faraway.There exist, however, certain conditions under which the rangeofvision is not so extended. For example, anearsightedperson cannot focus on objects farther than acertain point (thefar point), while a farsighted personcannot focus onobjects closer than a certain point (the nearpoint). Note thateven though the presence of a near point is commonto everyone, afarsighted person has a near point that is muchfarther from theeye than the near point of a person with normalvision.

Both nearsightedness and farsightedness can be correctedwiththe use of glasses or contact lenses. In this case, theeyeconverges the light coming from the image formed by thecorrectivelens rather than from the object itself.

When glasses (or contact lenses) are used tocorrectnearsightedness, where should the corrective lens form animage ofan object located at infinity in order for the eye to forma clearimage of that object?

	The lens should form the image at thenearpoint.
	The lens should form the image at thefarpoint.
	The lens should form the image at a pointcloserto the eye than the near point.
	The lens should form the image at apointfarther from the eye than the far point.

When glasses (or contact lenses) are usedtocorrect farsightedness, where should the corrective lens formanimage of an object located between the eye and the near pointinorder for the eye to form a clear image of that object?

	The lens should form the image at thenearpoint.
	The lens should form the image at thefarpoint.
	The lens should form the image at a pointcloserto the eye than the near point.
	The lens should form the image at apointfarther from the eye than the far point.