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प्रश्न
Name the defect of vision which makes the eye-lens cloudy resulting in blurred vision.
उत्तर
Cataract is the defect of vision that makes the eye lens cloudy, causing blurred vision.
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संबंधित प्रश्न
About 45 lac people in the developing countries are suffering from corneal blindness. About 30 lac children below the age of 12 years suffering from this defect can be cured by replacing the defective cornea with the cornea of a donated eye. How and why can students of your age involve themselves to create awareness about this fact among people?
Name any two defects of vision which can be corrected by using spectacles.
Where is the near point of a person suffering from hypermetropia (or long-sightedness)?
A student sitting in the last row of the class-room is not able to read clearly the writing on the blackboard.
How can this defect by corrected?
Explain with the help of labelled ray-diagram, the defect of vision called hypermetropia, and hot it is corrected by a lens.
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.
When do we consider a student sitting in the class to be myopic? List two causes of this defect. Explain using a ray diagram how this defect of eye can be corrected.
Give Reason:
When you enter into a dark room from bright because of sunlight, you can not see things for a few seconds.
