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Question

A cylindrical lens is used by a person suffering from?


A

presbyopia

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B

myopia

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C

astigmatism

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D

hypermetropia

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Solution

The correct option is C

astigmatism


Step 1: Explanation of the correct option

In the case of option C,

  1. Astigmatism is a type of refractive error due to rotational asymmetry in the eye's refractive power. This results in distorted or blurred vision at any distance
  2. Astigmatism develops whenever the curves on the front surface of the eye or the lens inside the eye are misaligned.
  3. This has been the most common kind of astigmatism and could be corrected with glasses, contact lenses, or laser surgery.
  4. A cylindrical lens is used by a person suffering from Astigmatism

Step 2: Explanation of the incorrect options

In the case of option A,

  1. The progressive loss of your eyes' capacity to focus on adjacent things is known as presbyopia. It's a normal, albeit irritating, component of becoming older.
  2. Presbyopia commonly appears in your early to mid-40s and worsens until you reach the age of 65.

In the case of option B,

  1. Nearsightedness, also known as Myopia, is a common vision disorder in which you can see items close to you clearly but not objects farther away.
  2. It happens when your eye's shape causes light rays to bend (refract) wrongly, concentrating pictures in front of your retina rather than on your retina.

In the case of option D,

  1. Hypermetropia is an eye disorder in which a picture of a close object forms behind the retina.
  2. Instead of concentrating on the retina, the light is concentrated behind it.

Therefore, option C is the correct answer.


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