Hypermetropia (Hyperopia)

HYPERMETROPIA (HYPEROPIA)

Q. 1

Refractive condition of the eye at birth is:

 A

Hypermetropia of 2 D

 B

Myopia of 2 D

 C

Hypermetropia of 5 D

 D

Myopia of 5 D

Q. 1

Refractive condition of the eye at birth is:

 A

Hypermetropia of 2 D

 B

Myopia of 2 D

 C

Hypermetropia of 5 D

 D

Myopia of 5 D

Ans. A

Explanation:

A i.e. Hypermetropia of 2 D


Q. 2

One millimeter decrease in axial length of the eyeball leads to hypermetropia of:

 A

6 dioptres

 B

2 dioptres

 C

3 dioptres

 D

4 dioptres

Q. 2

One millimeter decrease in axial length of the eyeball leads to hypermetropia of:

 A

6 dioptres

 B

2 dioptres

 C

3 dioptres

 D

4 dioptres

Ans. C

Explanation:

Ans. 3 dioptres


Q. 3

One millimeter increase in the radius of curvature of cornea leads to hypermetropia of:

 A

3 dioptres

 B

4 dioptres

 C

5 dioptres

 D

6 dioptres

Q. 3

One millimeter increase in the radius of curvature of cornea leads to hypermetropia of:

 A

3 dioptres

 B

4 dioptres

 C

5 dioptres

 D

6 dioptres

Ans. D

Explanation:

Ans. 6 dioptres


Q. 4

Over correction is preferable in:

 A

Myopia

 B

Presbyopia

 C

Hypermetropia

 D

Aphakia

Q. 4

Over correction is preferable in:

 A

Myopia

 B

Presbyopia

 C

Hypermetropia

 D

Aphakia

Ans. C

Explanation:

Ans. Hypermetropia

Quiz In Between


Q. 5

Angle closure glaucoma may be associated with:

March 2013 (g)

 A

Myopia

 B

Pseudomyopia

 C

Hypermetropia

 D

Pseudohypermteropia

Q. 5

Angle closure glaucoma may be associated with:

March 2013 (g)

 A

Myopia

 B

Pseudomyopia

 C

Hypermetropia

 D

Pseudohypermteropia

Ans. C

Explanation:

Ans. C i.e. Hypermetropia


Q. 6

Which of the following is not a cause of hypermetropia:      

September 2009

 A

Short axial length of the eyeball

 B

Flat cornea

 C

Increased refractive index of the cortex of lens

 D

Anterior dislocation of the lens

Q. 6

Which of the following is not a cause of hypermetropia:      

September 2009

 A

Short axial length of the eyeball

 B

Flat cornea

 C

Increased refractive index of the cortex of lens

 D

Anterior dislocation of the lens

Ans. D

Explanation:

Ans. D: Anterior dislocation of the lens

Factors responsible for hypermetropia:

  • Short axial length of the eyeball
  • Curvature hypermetropia commonly occurs as a factor in astigmatism (corneal plana)
  • Index hypermetropia accounts for the hypermetropia of old age due to increased refractive index of the cortex of the lens relative to the nucleus so that overall refractive power of the lens decreases.

It may be associated with diabetes, tumors, microphthalmia (a growth dysfunction during fetus development) and fovea hypoplasia, a condition that affects the blood vessels in the retina.

While these conditions may result in hypermetropia, one of the most commonly cited causes of farsightedness is considered to be aging.


Q. 7

Shortening of 2 mm of axial length of eye ball causes ‑

 A

3D myopia

 B

6D myopia

 C

3D hypermetropia 

 D

6D hypermetropia

Q. 7

Shortening of 2 mm of axial length of eye ball causes ‑

 A

3D myopia

 B

6D myopia

 C

3D hypermetropia 

 D

6D hypermetropia

Ans. D

Explanation:

Ans. is. d., 6D hypermetropia

  • Change in axial length can cause refractive error.
  • It is the commonest form of ametropia (both myopia and hypermetropia).
  • In hypermetropia, there is an axial shortening of eyeball.
  • So, image is formed behind the retina.
  • In myopia, there is an axial lengthening of eyeball.
  • So, image is formed in front of the retina.
  • 1 mm change in axial length leads to ametropia of 3D.
  • For example 1 mm shortening in axial length causes hypermetropia of 3D.

Quiz In Between



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