Advertisements
Advertisements
प्रश्न
Explain the Term: Cataract
Advertisements
उत्तर
Cataract: It is a condition in which the lens turns opaque and the vision is cut down even to total blindness. It can be corrected by surgically removing the lens and by using spectacles with highly convex lense.
APPEARS IN
संबंधित प्रश्न
List three common refractive defects of vision. Suggest the way of correcting these defects.
Explain two possible reasons of myopia. How can it be corrected? Explain with a suitable diagram.
A student is unable to see clearly the words written on the black board placed at a distance of approximately 3 m from him. Name the defect of vision the boy is suffering from. State the possible causes of this defect and explain the method of correcting it.
Name the defect of vision which makes the eye-lens cloudy resulting in blurred vision.
Name one defect of vision (or eye) which cannot be corrected by any type of spectacle lenses.
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
Name an old age eye defect. What happens in it?
The near point of the eye of a person is 50 cm. Find the nature and power of the corrective lens required by the person to enable him to see clearly the objects placed at 25 cm from the eye?
Give Technical Term:
The path which responsible for protecting the eye from sweat.
Nearsightedness: elongated eyeball : : farsightedness: _______
