English

A person cannot see the distant objects clearly (though he can see the nearby objects clearly). He is suffering from the defect of vision called: (a) cataract (b) hypermetropia (c) myopia (d) presbyopia - Science

Advertisements
Advertisements

Question

A person cannot see the distant objects clearly (though he can see the nearby objects clearly). He is suffering from the defect of vision called:
(a) cataract
(b) hypermetropia
(c) myopia
(d) presbyopia

Advertisements

Solution

 myopia

Myopia is a defect of vision because of which a person cannot see distant objects clearly but can see nearby objects distinctly.

shaalaa.com
  Is there an error in this question or solution?
Chapter 6: The Human Eyes And The Colorful World - Exercise 2 [Page 280]

APPEARS IN

Lakhmir Singh Physics (Science) [English] Class 10
Chapter 6 The Human Eyes And The Colorful World
Exercise 2 | Q 37 | Page 280

Video TutorialsVIEW ALL [1]

RELATED QUESTIONS

Write the importance of ciliary muscles in the human eye. Name the defect of vision that arises due to gradual weakening of the ciliary muscles. What types of lenses are required by the person suffering from this defect to see the objects clearly?

Akshay, sitting in the last row in his class, could not see clearly the words write on the blackboard. When the teacher noticed it, he announced if any student sitting in the front row could volunteer to exchange his seat with Akshay. Salman immediately agreed to exchange his seat with Akshay. He could now see the words written on the blackboard clearly. The teacher thought it fit to send the message to Akshay’s parents advising them to get his eyesight checked.

In the context of the above event, answer the following questions:-

(a) Which defect of vision is Akshay suffering from? Which type of lens is used to correct this defect?

(b) State the values displayed by the teacher and Salman.

(c) In your opinion, in what way can Akshay express his gratitude towards the teacher and Salman?


A man can read the number of a distant but clearly but he finds difficulty in reading a book. 

 From which defect of the eye is he suffering?


 A person having short-sight cannot see objects clearly beyond a distance of 1.5 m. What would be the nature and power of the corrective lens to restore proper vision?


The defect of vision which cannot be corrected by using spectacles is:
(a) myopia
(b) presbyopia
(c) cataract
(d) hypermetropia


A short-sighted person has a near point of 15 cm and a far point of 40 cm.
(a) Can he see clearly an object at a distance of:
(i) 5 cm?
(ii) 25 cm?
(iii) 50 cm?
(b) To see clearly an object at infinity, what kind of spectacle lenses does he need?


Which part of the eye is grafted in a needy patient from a donated eye?


Name the following:

The photosensitive pigment present in the rods of the retina.


Describe the mechanism of focusing the image of a distant object in your eye when you raise your head after reading a book.


A person cannot read newspaper placed nearer than 50 cm from his eyes. Name the defect of vision he is suffering from. Draw a ray diagram to illustrate this defect. List its two possible causes. Draw a ray diagram to show how this defect may be corrected using a lens of appropriate focal length.


The diagram alongside represents a section of a mammalian eye.
(i) Label the parts 1 to 5 of the diagram.
(ii) State the function of the parts labelled 4 and 5.
(iii) With the help of a diagram show the short sightedness.


 Name the common defects of the eye.


Differentiate between:

Short-sightedness and Long-sightedness.


What type of lens is used to correct Astigmatism?


Complete the following sentence with appropriate word :
An inability to focus on nearby objects due to loss of elasticity of the lens with age is called Iris.


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: 


In Myopia the human eye _______.


Myopia and hypermetropia can be corrected by:


Assertion: Myopia is the defect of vision in which a person cannot see distant objects clearly.

Reason: This due to eye-ball being too short.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×