Far Sightedness Hypermetropia
Far Sightedness Hypermetropia
Far-sightedness (Hypermetropia): Some people cannot see nearby objects clearly, although they can see distant objects clearly. This defect is called far-sightedness, long- sightedness, hypermetropia or hyperopia. It arises mainly due to two reason
People suffering from far-sightedness have difficulty in reading a book or a newspaper, or viewing a small object placed close to the normal near point, N (at 25 cm). People suffering from far-sightedness have to keep reading material or an object much farther away to see clearly.
Which of the following are correct : (a) Far-sightedness is also known as long- sightedness, hypermetropia or hyperopia. (b) In farsightedness, people cannot see nearby objects clearly, although they can see distant objects clearly. | |||
| Right Option : C | |||
| View Explanation | |||
A man wearing glasses of focal length +1m cannot clearly see beyond one meter, then we can say _________________. | |||
| Right Option : A | |||
| View Explanation | |||
Which of the following are the reason of farsightedness : (a) The eyeball becomes shorter than the normal. As a result, the distance of the retina from the crystalline lens decreases. (b) The eyeball becomes wider than the normal. As a result, the distance of the retina from the crystalline lens decreases. (c) If the eye-lens has a focal length that is larger than the normal due to abnormal curvatures of the cornea. (d) if the eye-lens has a focal length that is smaller than the normal due to abnormal curvatures of the cornea. | |||
| Right Option : C | |||
| View Explanation | |||
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