Your 62 year old aunt is having a hard time reading the newspaper. She has never neede any glasses or had problems reading before. She complains she can't see the text clearly. a) What is the name of her problem and why does it happen? Where does the image in her eye form? b) What type of lens does she need to correct her problem?
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Explanation:
a) this is called presbyopia. this condition occurs in the old age people due to the loss of elasticity of lens of the eye and weakening of ciliary muscles.
image is formed behind the retina which causes blurring of image.
b) this type of defect is corrected by using bifocal lens which has two types of lens concave viewing nearer object and convex for viewing distinct objects.
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