A ......... lens is used to correct pres...

A ......... lens is used to correct presbyopia.

A

convex

B

concave

C

bi-focal

D

contact

Text Solution

Verified by Experts

The correct Answer is:

A, B, C

Topper's Solved these Questions

THE HUMAN EYE AND THE COLOURFUL WORLD
KUMAR PRAKASHAN|Exercise OBJECTIVE QUESTIONS AND ANSWERS (Answer the following questions in very short as directed (Miscellaneous) )|55 Videos
THE HUMAN EYE AND THE COLOURFUL WORLD
KUMAR PRAKASHAN|Exercise Value Based Questions With Answers|24 Videos
THE HUMAN EYE AND THE COLOURFUL WORLD
KUMAR PRAKASHAN|Exercise OBJECTIVE QUESTIONS AND ANSWERS|3 Videos
QUESTION PAPER-2 (MARCH,2020 - BOARD'S QUESTIONS PAPER)
KUMAR PRAKASHAN|Exercise Section - D (Answer the following questions)|3 Videos

Similar Questions

Explore conceptually related problems

A ......... corrective lens is used to rectify near-sightedness.

What is the cause for presbyopia ?

Give scientific reasons for the following statements: To rectify the defect of far-sightedness or hypermetropia, convex lens of suitable focal length is used as corrective lens.

Give scientific reasons for the following statements: To rectify the defect of near-sightedness or myopia, concave lens of suitable focal length is used as corrective lens.

What is the power of a lens that can be used to correct the eye defect of a person who cannot see the objects distinctly kept beyond 2 m ?

For a person suffering from .......... the power of the lens used in spectacles is positive.

The far point of a myopic person is 80 cm in front of the eye. What is the nature and power of the lens required to correct the problem?

When the ciliary muscles are relaxed, the eye lens becomes ......... and its focal length .......... This enables us to see distant objects clearly.

Write a short note on Presbyopia

A person with a myopic eye cannot see objects beyond 1.2 m distinctly. What should be the type of the corrective lens used to restore proper vision ?

KUMAR PRAKASHAN-THE HUMAN EYE AND THE COLOURFUL WORLD-OBJECTIVE QUESTIONS AND ANSWERS (Choose the correct option)

In the human eye, the image of an object is formed at the ........
Text Solution
|
The focal length of the eye lens is changed due to the action of the……...
Text Solution
|
A ......... lens is used to correct presbyopia.
Text Solution
|
Out of the following, which phenomenon does not play a role in the for...
Text Solution
|
Where is the image formed in the eye of a person suffering from near-s...
Text Solution
|
Which phenomenon is responsible for the twinkling of stars ?
Text Solution
|
The phenomenon of ......... of light by the colloidal particles gives ...
Text Solution
|
What is the time difference between actual sunset and apparent sunset?
Text Solution
|
Which light gets scattered maximum due to atmosphere?
Text Solution
|
Which light has minimum speed in glass (prism)?
Text Solution
|
When an eye is focussed on a distant object, the focal length of the e...
Text Solution
|
How many surfaces does a triangular prism have ?
Text Solution
|
The wavelengths of violet, yellow and red light are lambda(v), lambda(...
Text Solution
|
For normal vision, the far point is at…………. distance.
Text Solution
|
For normal vision, the near point is ............
Text Solution
|
Which phenomenon can explain the advance sunrise and the delayed sunse...
Text Solution
|
Which of the following phenomena cannot be explained by scattering of ...
Text Solution
|
The base of an equilateral triangle ABC is BC. When it is arranged in ...
Text Solution
|
The Sun appears white in afternoon. The reason is ..........
Text Solution
|
Sea water at more depth appears blue. The reason is …….....
Text Solution
|