English

A person is unable to read a book placed closer than 1 meter from his eyes. Identify the defect of vision in his eyes. Draw the ray diagrams to show the defect of vision and its correction.

Advertisements
Advertisements

Question

A person is unable to read a book placed closer than 1 meter from his eyes. Identify the defect of vision in his eyes. Draw the ray diagrams to show the defect of vision and its correction.

Diagram
Short Answer
Advertisements

Solution

The defect of vision where a person is unable to see nearby objects clearly is called hypermetropia or long-sightedness. This condition occurs when the eye is unable to focus light directly on the retina, causing nearby objects to appear blurry. This can be corrected using a convex lens.

Hypermetropic eye:

Correction for hypermetropic eye:

shaalaa.com
  Is there an error in this question or solution?
2025-2026 (March) 31/1/1

Video TutorialsVIEW ALL [1]

RELATED QUESTIONS

List three common refractive defects of vision. Suggest the way of correcting these defects.


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?


What is the other name of old age hypermetropia?


A student sitting in the last row of the class-room is not able to read clearly the writing on the blackboard.

  1. Name the type of defect he is suffering from.
  2. How can this defect by corrected?

State one role of ciliary muscles in the human eye.


When do we consider a student sitting in the class to be myopic? List two causes of this defect. Explain using a ray diagram how this defect of eye can be corrected.


Rewrite the following table so as to match second and third column with first column.

 

Column I
Column II
Column III
(i) Myopia
Old age problem
Bifocal lens
(ii) Presbyopia
Nearsightedness
Concave lens.

Given below is a diagrammatic representation of a defect of the human eye:

(i) Identify the defect.
(ii) Mention two reasons for the above defect.
(iii) State how the defect can be rectified.
(iv) Name the part of the eye responsible for maintaining the shape of the eyeball.


Observe the figure whether it is correct or not and explain the phenomenon.


A person is unable to see clearly a poster fixed on a distant wall. He however sees it clearly when standing at a distance of about 2 m from the wall.

  1. Draw ray diagram to show the formation of image by his eye lens when he is far away from the wall.
  2. List two possible reasons of this defect of vision.
  3. Draw ray diagram to show the correction of this defect using appropriate lens.

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×