If the optician's prescription for the spectacles reads: Left eye: -3.00 D, Right eye: -3.5 D then the person is suffering from the defect of vision called:

Astigmatism

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Myopia

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Presbyopia

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Hypermetropia

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Solution

The correct option is C Myopia
The prescribed spectacles are of negative power which means the lenses are concave (diverging).
The concave lens is used when a person cannot see the distant objects clearly because the image received by the eye is focused in front of the retina.
This disease is called myopia and also known as Near-sightedness.

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Similar questions

A person got his eyes tested by an optician. The prescription for the spectacle lenses to be made reads : Left eye : + 2.50 D Right eye : + 2.00 D (a) State whether these lenses are thicker in the middle or at the edges. (b) Which lens bends the light rays more strongly ? (c) State whether these spectacle lenses will converge light rays or diverge light rays.

Q. A person got his eyes tested by an optician. The prescription for the spectacle lenses to be made reads :
Left eye : +2.50 D
Right eye : +2.00 D
(a) State whether these lenses are thicker in the middle or at the edges.
(b) Which lens bends the light rays more strongly?
(c) State whether these spectacle lenses will converge light rays or diverge light rays.

Q. The optical prescription for a pair of spectacles is :
Right eye : −3.50 D
Left eye : −4.00 D
(a) Are these lenses thinner at the middle or at the edges?
(b) Which lens has a greater focal length?
(c) Which is the weaker eye?

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