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A person is not able to see for off obj...

A person is not able to see for off objects clearly. From which defect of the eye the person is suffering ? How to correct this defect ?

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### Step-by-Step Solution: 1. **Identify the Defect**: - The person is unable to see far-off objects clearly, which indicates a vision problem known as **myopia** or **nearsightedness**. In myopia, the eye focuses images in front of the retina instead of directly on it. 2. **Understanding Myopia**: - Myopia occurs when the eyeball is too long or the cornea has too much curvature. This causes light rays to converge before they reach the retina, resulting in blurred vision for distant objects. ...
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Knowledge Check

  • A person cannot see objects clearly beyond 125 cm. The power of the lens to correct the vision is

    A
    `-2D`
    B
    `+2D`
    C
    `-0.8D`
    D
    `+0.8D`

  • A person cannot see the distant objects clearly (though he can see the nearby objects clearly). He is suffering from the defect of vision called :

    A
    cataract
    B
    hypermetropia
    C
    myopia
    D
    presbyopia

  • A person is not able to see objects farther than 80 cm clearly, while another person is not able to see objects beyond 120 cm, clearly. The powers of the lenses used by them for correct vision are in the ratio -

    A
    `2:3`
    B
    `3:2`
    C
    `1:2`
    D
    `2:1`

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    A person is unable to see objects distinctly placed within 50 cm from his eyes. (a) Name the defect of vision the person is suffering from and list its two possible causes. (b) Draw ray diagram to show the defect in the above case. (c) Mention the type of lens used by him for the correction of the defect and calculate its power. Assume that the near point for the normal eye is 25 cm. (d) Draw a labelled diagram for the correction of the defect in the above case.

    A student sitting in the last row of the class-room is not able to read clearly the writing on the blackboard. (a) Name the type of defect he is suffering from. (b) How can this defect by corrected ?

    A person is not able to see vertical wires clearly in a grid of wires. What is this defect and how it is corrected ?

    A man can read the number of a distant bus clearly but he finds difficulty in reading a book. (a) From which defect of the eye is he suffering ? (b) What type of spectacle lens should he use to correct the defect ?

    A person can see objects clearly from a distance 10cm to infinity. Then we can say that the person is (A) The person with exceptional eye having no eye defect (B) near - sighted person (C) far sighted person (D) presbyopic person

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