Advertisements
Advertisements
Question
Explain the Term: Presbyopia
Advertisements
Solution
Presbyopia: It is a condition affecting older people who cannot see near objects clearly. Their lens loses flexibility resulting in a kind of far-sightedness. This again is corrected by a convex lens.
APPEARS IN
RELATED QUESTIONS
Name an old age eye defect. What happens in it?
Have a look at the posture of this girl who is reading a book and answer the questions which follow:

Name the problem she is facing.
State one role of ciliary muscles in the human eye.
State the main functions of the following:
Tears
Given below is a diagram depicting a defect of the human eye? Study the same and answer the question that follow:

Name the parts labeled 1 to 4.
Name the common defects of the eye.
Give Reason:
When you enter into a dark room from bright because of sunlight, you can not see things for a few seconds.
Give Technical Term:
The path which responsible for protecting the eye from sweat.
Observe the following diagram and answer questions following it:

- Identify the defect of vision shown.
- List its two causes.
- Name the type of lens used for the correction of this defect.
A teacher drew the diagram of the heart on the blackboard and told the students to copy it in their notebooks. Mahesh couldn't see the diagram clearly as it appeared blurred to him.
- Name the defect of the eye Mahesh is suffering from.
- Where is the image formed in this defect?
- Mahesh consults an eye doctor and is prescribed suitable lenses to correct the defect. Which type of lens do his spectacles have?
