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•You are looking at someone wearing eyeglasses and their eyes appear larger thro

ID: 1533463 • Letter: #

Question

•You are looking at someone wearing eyeglasses and their eyes appear larger through the glasses. What can you say about their vision and the purpose of these corrective lenses?

>The right answer is: the person is hyperopic and the lenses are to create images of objects nearer to the person (than are the original objects)

I would've thought that the hyperopic lenses create images of objects further from the person -since their near point is futher than it should be (far-sighted) and to correct for hyperopia a converging lens "should shift close objects to the near point ".

The question is:

You are looking at someone wearing eyeglasses and their eyes appear larger through the glasses. What can you say about their vision and the purpose of these corrective lenses? (so the lenses must be converging since they magnify the eyes)

The answer is : the person is hyperopic and the lenses are to create images of objects nearer to the person (than are the original objects)

I don't understand why the answer is not: "the person is hyperopic and the lenses are to create images of objects farther from the person (than are the original objects)"

Explanation / Answer

The lens must be converging because it is working like a simple microscope as it magnifies the eyes of the wearer.

Rest assured that your logic is sound, this lens will shift the image of a close object beyond the near point of the hyperopic eye ,so that the eye lense can form the final image at the retina.

Before the corrective lens ,the final image was behind the retina as the eyelens was unable to focus the incident rays on it.