Home
Class 12
PHYSICS
Astigmation is correct by using...

Astigmation is correct by using

A

culindrical lens

B

plano convex lens

C

plano concave lens

D

convex lens

Text Solution

Verified by Experts

The correct Answer is:
A
In this defect, eye cannot perpendicular direction clear, i.e. horizontal and vertical lines simultaneously. It is due to imperfect spherical nature of eye lens. This defect can be removed by using cylindrical lenses. (Torric lenses)
Promotional Banner

Topper's Solved these Questions

  • RAY OPTICS

    DC PANDEY|Exercise medical entrance special format question|25 Videos

  • NUCLEI

    DC PANDEY|Exercise C MADICAL ENTRANCES GALLERY|46 Videos

  • REFLECTION OF LIGHT

    DC PANDEY|Exercise Subjective|9 Videos

Similar Questions

Explore conceptually related problems

Astigmatism can be corrected by using

The eye defect, Astigmatism can be corrected by using , -

Short sightedness in humans can be corrected by using

The defect of vision which cannot be corrected by using spectacles is :

Myopia is corrected by the use of a

DC PANDEY-RAY OPTICS-Medical entrance gallary
  1. A focal length of a lens 10cm. What is power of a lens in dipotre?

    Text Solution

    |

  2. If the focal length of the objective lens is increased then

    Text Solution

    |

  3. Astigmation is correct by using

    Text Solution

    |

  4. The image formed by an objective of a compound microscope is

    Text Solution

    |

  5. An astronomical telescope arranged for normal adjustment has a magnifi...

    Text Solution

    |

  6. A microscope is having objective of focal length and eye piece of foca...

    Text Solution

    |

  7. Diameter of the objective of a telescope is 200cm. What is the resolvi...

    Text Solution

    |

  8. A plano convex lens fits exactly into a plano concave lens. Their plan...

    Text Solution

    |

  9. For a normal eye, the cornea of eye provides a converging power of 40 ...

    Text Solution

    |

  10. An object is 8cm high. It is desired to form a real image 4cm high at ...

    Text Solution

    |

  11. When an object is placed 40cm from a diverging lens, its virtual image...

    Text Solution

    |

  12. A magnifying glass of focal length 5cm is used to view an object by a ...

    Text Solution

    |

  13. A person has a minimum distance of distinct vision as 50cm. The power ...

    Text Solution

    |

  14. The distance of moon form the earth is 3.8xx10^(5) km. Supposing that ...

    Text Solution

    |

  15. A small angled prism of refractive index 1.4 is combined with another ...

    Text Solution

    |

  16. The magnifytion power of the astronomical telescope for normal adjustm...

    Text Solution

    |

  17. The speed of light in media M1 and M2 are 1.5 xx 10^8 m//s and 2.0 xx ...

    Text Solution

    |

  18. Radii of curvature of a canverging lends are in the ration 1:2. Its fo...

    Text Solution

    |

  19. The sun light reaches us as white and not as its components because

    Text Solution

    |

  20. The radius of curvature of the convex face of a plano convex lens is 1...

    Text Solution

    |