Advertisements
Advertisements
प्रश्न
A person is unable to read a book placed closer than 1 meter from his eyes. Identify the defect of vision in his eyes. Draw the ray diagrams to show the defect of vision and its correction.
Advertisements
उत्तर
The defect of vision where a person is unable to see nearby objects clearly is called hypermetropia or long-sightedness. This condition occurs when the eye is unable to focus light directly on the retina, causing nearby objects to appear blurry. This can be corrected using a convex lens.
Hypermetropic eye:
Correction for hypermetropic eye:
APPEARS IN
संबंधित प्रश्न
What is myopia?
What is the other name of old age hypermetropia?
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 defect of vision in which the eye-lens of a person gets progressively cloudy resulting in blurred vision is called:
(a) myopia
(b) presbyopia
(c) colourblindness
(d) cataract
Name the following:
The photosensitive pigment present in the rods of the retina.
Differentiate between members of the following pair with reference to what is asked in bracket.
Myopia and hyperopia (cause of the defect)
Observer the following diagram and answer the questions.
a) Which eye defect is shown in this diagram?
b) What are the possible reasons for this eye defect?
c) How this defect is corrected, write it in brief?
In what two whys is a yellow spot different from the blind spot?
Name the following:
Two kinds of accomodations.
Have a look at the posture of this girl who is reading a book and answer the questions which follow:
 |
- Name the problem she is facing.
- What are the two conditions shown in sections A and B of the eye as applicable to her.
- What kind of reading glasses does she need?
 |
 |
| A | B |
