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प्रश्न
Draw a neat labeled diagram to show how hypermetropia can be rectified.
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उत्तर
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संबंधित प्रश्न
Name the defect of vision which makes the eye-lens cloudy resulting in blurred vision.
A young man has to hold a book at arm's length to be able to read it clearly. The defect of vision is:
(a) astigmatism
(b) myopia
(c) presbyopia
(d) hypermetropia
The defect of vision in which the eye-lens of a person gets progressively cloudy resulting in blurred vision is called:
(a) myopia
(b) presbyopia
(c) colourblindness
(d) cataract
Differentiate between members of the following pair with reference to what is asked in the bracket.
Rods and cones (sensitivity).
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.
In what two whys is a yellow spot different from the blind spot?
Give Reason:
Deficiency of vitamin A causes night blindness.
Give Technical Term:
The type of lens used to correct myopia is
Due to elongation of _______ and increase in curvature of the eye lens, a person cannot see distant objects clearly.
A person is unable to see clearly a poster fixed on a distant wall. He however sees it clearly when standing at a distance of about 2 m from the wall.
- Draw ray diagram to show the formation of image by his eye lens when he is far away from the wall.
- List two possible reasons of this defect of vision.
- Draw ray diagram to show the correction of this defect using appropriate lens.
