CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Common Defects of the Eye

A student sit...

Question

A student sitting at the back of the classroom cannot read clearly the letters written on the blackboard. What advice will a doctor give to her? Draw a ray diagram for the correction of this defect.

Open in App

Solution

If a student cannot see the blackboard distance to her she is suffering from myopia.
Myopia is the inability of an eye in viewing long distant objects.
The image in this case is formed before the retina.
The short-sightedness is corrected by using a concave lens which diverges and shifts the image to the retina.
Hence, the doctor advises a concave lens of suitable focal length.
Ray diagram for the correction of this defect

Suggest Corrections

thumbs-up

8

Similar questions

Q. A student sitting in the last row of the class-room is not able to read clearly the writing on the blackboard.
(a) Name the type of defect he is suffering from.
(b) How can this defect by corrected ?

Q. A student finds the writing on the blackboard as blurred and unclear when sitting on the last desk in the classroom. He, however, sees it clearly when sitting on the front desk at an approximate distance of 2 m from the blackboard. Draw ray diagrams to illustrate the formation of the image of the blackboard writing by his eye-lens when he is seated at the (i) last desk (ii) front desk. Name the kind of lens that would help him to see clearly even when he is seated at the last desk. Draw a ray diagram to illustrate how this lens helps him to see clearly.

Q. A student sitting at the back of the classroom cannot read clearly the letters written on the blackboard. What advice will a doctor give to her? Draw ray diagram for the correction of this defect.

Q. Question 16
A student sitting at the back of the classroom cannot read clearly the letters written on the blackboard. What advice will a doctor give to her? Draw ray diagram for the correction of this defect.

Q. A student sitting at the back of the classroom cannot read clearly the letters written on the blackboard. What advice will a doctor give to her?

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

BIOLOGY

Watch in App

explore_more_icon

Explore more

Common Defects of the Eye

Standard X Biology

Join BYJU'S Learning Program

CrossIcon