English

Name the Defect of Vision in a Person: Whose Far Point is Less than Infinity

Advertisements
Advertisements

Question

Name the defect of vision in a person: 

whose far point is less than infinity

Advertisements

Solution

Myopia is the defect of vision in a person whose far point is located closer than infinity.

shaalaa.com
  Is there an error in this question or solution?
Chapter 3: The Human Eyes And The Colorful World - Exercise 2 [Page 279]

APPEARS IN

Lakhmir Singh Physics [English] Class 10
Chapter 3 The Human Eyes And The Colorful World
Exercise 2 | Q 2.2 | Page 279

Video TutorialsVIEW ALL [1]

RELATED QUESTIONS

Given below is a diagram showing a defect of human eye. Study it and answer the following questions.

(i) Name the defect shown in the figure.
(ii) Give reason for this defect of eye in human being.
(iii) Name the type of lens used to correct the eye defect.


Name the defect of vision in which the eye-lens loses its power of accommodation due to old age.


Name one defect of vision (or eye) which cannot be corrected by any type of spectacle lenses.


What is the far point of a person suffering from myopia (or short-sightedness)?


Name the defect of vision which can be corrected by a converging lens. Show clearly by a ray diagram how the lens corrects the defect.


What is short-sightedness? State the two causes of short-sightedness (or myopia). With the help of ray diagrams, show:
(i) the eye-defect short-sightedness.
(ii) correction of short-sightedness by using a lens.


You do not enjoy watching a movie from a very short distance from the screen in a cinema hall. Why?


Given alongside is a diagram depicting a defect of the human eye. Study the same and then answer the questions that follow: 
(i) Identify the defect. 
(ii) Name the parts labelled 1, 2 and 3. 
(iii) Give labelled two possible reasons for this eye defect. 
(iv) Draw a labelled diagram to show how the above mentioned defect is rectified. 


Name the cells of the retina that are sensitive to colours.

 Name the common defects of the eye.


Give Reason:

Deficiency of vitamin A causes night blindness.


Name the following:
The defect of the human eye caused due to the uneven surface of the cornea.


Study the following diagram carefully and then answer the questions that follow. The diagram is depicting a defect of the human eye :

(i) Identify the defect shown in the diagram.
(ii) Give two possible reasons for the above defect.


Mention, if the following statement is True or False
Hypermetropia is a defect of the eye caused due to the eyeball elongation


 Choose the Odd One Out: 


Due to elongation of _______ and increase in curvature of the eye lens, a person cannot see distant objects clearly.


Myopia and hypermetropia can be corrected by:


Assertion: Concave mirrors are used as reflectors in torches, vehicle head lights and in search lights.

Reason: When an object is placed beyond the center of curvature of a concave mirror, the image formed is real and inverted.


Which of the following statement is correct?


State reasons for Myopia. With the help of ray diagrams, show the:

  1. image formation by a myopic eye, and
  2. correction of myopia using an appropriate lens.

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×