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प्रश्न
Which of the following statement is correct?
विकल्प
A person with myopia can see distant objects clearly
A person with hypermetropia can see nearby objects clearly
A person with myopia can see nearby objects clearly
A person with hypermetropia cannot see distant objects clearly
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उत्तर
A person with myopia can see nearby objects clearly
Explanation -
Nearsightedness or myopia is the inability of the eye to see the far located objects clearly.
APPEARS IN
संबंधित प्रश्न
What is myopia?
What is the other name for
hypermetropia
Your friend can read a book perfectly well but cannot read the writing on blackboard unless she sits on the front row in class.
What type of lenses-converging or diverging-would an optician prescribe for her?
An eye has a near point distance of 0.75 m. What sort of lens in spectacles would be needed to reduce the near point distance to 0.25 m? Also calculate the power of lens required. Is this eye long-sighted or short-sighted?
The picture given here shows a person wearing 'half-moon' spectacles. What sort of eye-defect do do you think he has? Why are these particular spectacles useful to him?
The near point of a long-sighted person is 50 cm from the eye.
(a) Can she see clearly an object at:
(i) a distance of 20 cm?
(ii) at infinity?
Differentiate between members of the following pair with reference to what is asked in the bracket.
Rods and cones (sensitivity).
You do not enjoy watching a movie from a very short distance from the screen in a cinema hall. Why?
Enumerate the common defects of vision, their causes and the possible methods of correcting them.
An old man cannot see objects closer than 1 m from the eye clearly. Name the defect of vision he is suffering from. How can it be corrected? Draw ray diagram for the (i) defect of vision and also (ii) for its correction.
Have a look at the posture of this woman who is reading a book and answer the questions which follow:
What kind of looking glasses she needs?
Name the common defects of the eye.
Give Reason:
Deficiency of vitamin A causes night blindness.
Differentiate between:
Short-sightedness and Long-sightedness.
Explain the Term: Astigmatism
What type of lens is used to correct Hypermetropia?
Given below is a diagrammatic representation of a defect of the human eye:
(i) Identify the defect.
(ii) Mention two reasons for the above defect.
(iii) State how the defect can be rectified.
(iv) Name the part of the eye responsible for maintaining the shape of the eyeball.
What are the causes of ‘Myopia’?
Observe the figure whether it is correct or not and explain the phenomenon.
