Advertisements
Advertisements
प्रश्न
Give Reason:
Older people require glasses to read and write.
Advertisements
उत्तर
In old age the flexibility of the lens declines and the lens becomes less convex or opaque leading to weakness of eyesight.
APPEARS IN
संबंधित प्रश्न
A student sitting in the last row of the class-room is not able to read clearly the writing on the blackboard.
Name the type of defect he is suffering from.
Which part of the eye is grafted in a needy patient from a donated eye?
Name the following:
The eye defect caused due to shortening of the eye ball from front to back.
Given below is a diagram depicting a defect of the human eye. Study the same and answer the question that follow:
Name the defect shown in the diagram.
State one role of ciliary muscles in the human eye.
Solve the following question:
The near point of the eye of a person is 50 cm. Find the nature and power of the corrective lens required by the person to enable him to see clearly the objects placed at 25 cm from the eye?
Name the following:
The defect of the human eye caused due to the uneven surface of the cornea.
Choose the Odd One Out:
In Myopia the human eye _______.
A person needs a lens of power –4.5 D for correction of her vision.
- What kind of defect in vision is she suffering from?
- What is the focal length of the corrective lens?
- What is the nature of the corrective lens?
