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प्रश्न
Explain the Term: Presbyopia
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उत्तर
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.
संबंधित प्रश्न
The kind of lens required to correct Myopia
Which defect of vision can be rectified:
by using a concave lens?
Which defect of vision can be rectified:
by using a convex lens?
What is the other name of old age hypermetropia?
A student has difficulty reading the blackboard while sitting in the last row. What could be the defect the child is suffering from? How can it be corrected?
Write whether the following is true or false:
A convex lens is used for correcting myopia.
Name the common defects of the eye.
Differentiate between:
Myopia and Hypermetropia.
Explain the Term: Astigmatism
Correlate the given sequence:
Hypermetropia : Convex lens : ______ : Concave lens
