Hypermetropia

Q. Hypermetropia can be corrected by using?

1. Concave mirror
2. Convex mirror
3. Concave lens
4. Convex lens

Q.

Hypermetropia defect arises due to:

1. focal length of eye lens is too long

2. excessive curvature of eye lens

3. elongation of eyeball

4. weakening of ciliary muscles

Q.

Happens to the eye when you enter a dark cinema hall from bright sunshine? Give reasons for your answer.

Q.

Why are we not able to see the things clearly when we come out of a darkroom?

Q.

A person is having hypermetropic eye whose near point is at $125cm$. What is the power of the spectacles required for that person?

1. $+1D$

2. $-1D$

3. $+3D$

4. $-3D$

Q. For a hypermetropic eye, the image of a nearby object will be formed ________

1. on the retina
2. in front of the retina
3. behind the retina
4. no image will be formed

Q. Convex lens is used in the case of

1. presbyopia
2. astigmatism
3. myopia
4. hypermetropia

Q.

what happens if angle vision is greater than 60°

Q.

A diverging lens is used in : (a) a magnifying glass (b) a car to see objects on rear side (c) spectacles for the correction of short sight (d) a simple camera

Q.

The near point of a hypermetropic eye is 1 metre What is the power of the lens required to correct this defect? (Assuming that the near point of a normal eye as 25cm)

1. +3 D

2. + 4 D

3. +5 D

4. +6 D

Q.

A person with hypermetropic eye can read only material kept beyond 50 cm from the eye. Why?

1. Light rays from a nearby object are focused at a point in front of the retina.

2. Light rays from a closeby object are focused at a point beyond the retina.

3. Light rays from distant objects are focused at a point beyond the retina.

4. Light rays from a distant object are focused at a point infront of the retina.

Q. The eye forms a real and inverted image of an object on the retina. If the eye lens is defective, the image of objects may be formed in front of or behind the retina. Persons in whom the image is formed in front of the retina are not able to see the distant objects clearly while if the image is formed behind the retina the person is not able to see a near object clearly. The latter kind of people is said to be longsighted.
Persons suffering from myopia cannot see clearly the

1. Distant objects
2. Near objects
3. Spherical objects
4. Neither near nor distant

Q.

What is the near and far point of a normal eye?

Q.

The image of a distance point object appears as a line on the retina due to___ .

Q.

A person with hypermetropic eye can read only material kept beyond 50 cm from the eye. Why?

1. Light rays from a closeby object are focused at a point beyond the retina.

2. Light rays from distant objects are focused at a point beyond the retina.

3. Light rays from a nearby object are focused at a point in front of the retina.

4. Light rays from a distant object are focused at a point infront of the retina.

Q. What is the range of vision of a normal human eye?

Q. Inability of the eye to focus on both far and near objects with advancing age is:

1. Astigmatism
2. Presbyopia
3. Myopia
4. Hypermetropia

Q. People with hypermetropia can see distant objects clearly.

1. False
2. True

Q. My grandfather uses a bifocal lens in his spectacle. Explain why?

Q. A ...... lens is used to correct myopia and a ........ lens is used to correct hypermetropia.

1. Concave, concave
2. Convex, convex
3. Convex, concave
4. Concave, convex

Q. Study it and answer the following questions :

1. $Convex$
2. $Concave$
3. $Bifocal$
4. All of the above can be used

Q. If the eyeball of a person is shorter, then the person is suffering from:

1. Myopia
2. Hypermetropia
3. Presbyopia
4. Cataract

Q. Observe the given figure. Name the eye defect indicated in the figure and also mention the lens used to correct this defect.

Q.

The near point of a hypermetropic eye is 1 metre What is the power of the lens required to correct this defect? (Assuming that the near point of a normal eye as 25cm)

1. +3 D

2. + 4 D

3. +5 D

4. +6 D

Q. The defective condition of accommodation of the eye in which distant objects are clearly seen but near objects are indistinct is

1. Presbyopia
2. Astigmatism
3. Hypermetropia
4. Myopia

Q. A child sitting at the backbench of a classroom is unable to see the letters on the board clearly. What is the defect of the eye of the child? How can it be remedied? Draw its ray diagram.

Q. The power of corrective lens used for which defect has a positive power?

1. Myopia
2. Hypermetropia
3. Cataract
4. Glaucoma

Q.

A person with hypermetropic eye can read only material kept beyond 50 cm from the eye. Why?

1. Light rays from a closeby object are focused at a point beyond the retina.

2. Light rays from a distant object are focused at a point infront of the retina.

3. Light rays from a nearby object are focused at a point in front of the retina.

4. Light rays from distant objects are focused at a point beyond the retina.

Q. The focal length of a hypermetropic person for close-by objects is ______ that of a healthy eye.

1. less than
2. more than
3. equal to
4. half