Retinoscopy

RETINOSCOPY

Q. 1

All of the following are cycloplegics except :

 A

Phenylephrine

 B

Atropine

 C

Homatropine

 D

Cocaine

Q. 1

All of the following are cycloplegics except :

 A

Phenylephrine

 B

Atropine

 C

Homatropine

 D

Cocaine

Ans. A

Explanation:

A i.e. Phenylephrine


Q. 2

A man, 35 yrs of age complains of poor near vision Distant vision is normal. Retinoscopy at 1 meter shows + 2 D spherical lens. He has: 

 A

Hypermetropia

 B

Presbyopia

 C

Myopia

 D

Accomodation paralysis

Q. 2

A man, 35 yrs of age complains of poor near vision Distant vision is normal. Retinoscopy at 1 meter shows + 2 D spherical lens. He has: 

 A

Hypermetropia

 B

Presbyopia

 C

Myopia

 D

Accomodation paralysis

Ans. A

Explanation:

A i.e. Hypermetropia 

* In hypermetropia, eyeball and cornea are small, anterior chamber is shallow fundus examination reveals pseudopapillitis & shot silk appearance. Degenerative retinoschisis is more common in hypermetropes.

* In Myopia (i.e. poor distant vision Q) eyeball & cornea are large (patient squeezes eye to see distant things clearly Q) anterior chamber is deep. Fundus examination reveals myopic crescents, Foster fuch’s spot and peripheral retinal (lattice & snail track) degenerationQ


Q. 3

Retinoscopy is done on a 0.5D myopic patient at a distance of 1 metre. Movem-ent of the image will

 A

Move with the mirror

 B

Move opposite to the mirror

 C

No movement of image with mirror

 D

Image can move to any side

Q. 3

Retinoscopy is done on a 0.5D myopic patient at a distance of 1 metre. Movem-ent of the image will

 A

Move with the mirror

 B

Move opposite to the mirror

 C

No movement of image with mirror

 D

Image can move to any side

Ans. A

Explanation:

A i.e. Move with the mirror

Quiz In Between


Q. 4

In retinoscopy for refractive error at 1 m we add 1D if done at distance of 66 cm, the addition factor will be:

 A

– 2

 B

-1.5

 C

– 0.5

 D

– 5

Q. 4

In retinoscopy for refractive error at 1 m we add 1D if done at distance of 66 cm, the addition factor will be:

 A

– 2

 B

-1.5

 C

– 0.5

 D

– 5

Ans. B

Explanation:

B i.e. -1.5

A rough estimate of refraction is made by taking into account the retinoscopic findings, deductions for distance (e.g. 1D for 1 metre and 1.5 D when retinoscopy is performed at 2/3rd meter distance) Q and deduction for cycloplegic when used (e.g. 1D for atropine, 0.5 D for homatropine and 0.75 D for cyclopentolate) Q.


Q. 5

Retinoscopy is used for visualising the:

 A

Whole retina

 B

Only the peripheral part of the retina

 C

Detecting errors of refraction

 D

None

Q. 5

Retinoscopy is used for visualising the:

 A

Whole retina

 B

Only the peripheral part of the retina

 C

Detecting errors of refraction

 D

None

Ans. C

Explanation:

Ans. Detecting errors of refraction


Q. 6

In retinoscopy for refractive error at lm we add -1 D. If done at a distance of 66 cm, the addition factor will be:

 A

-2D

 B

-1.5 D

 C

-0.5 D

 D

-5 D

Q. 6

In retinoscopy for refractive error at lm we add -1 D. If done at a distance of 66 cm, the addition factor will be:

 A

-2D

 B

-1.5 D

 C

-0.5 D

 D

-5 D

Ans. B

Explanation:

Ans. -1.5 D

Quiz In Between


Q. 7

During retinoscopy with a plane mirror from a distance of 1 M, no movement of pupillary red reflex with the movement of the mirror indicates:

 A

Emmetropia

 B

Myopia of 1 D

 C

Hypermetropia of less than 1 D

 D

All of the above

Q. 7

During retinoscopy with a plane mirror from a distance of 1 M, no movement of pupillary red reflex with the movement of the mirror indicates:

 A

Emmetropia

 B

Myopia of 1 D

 C

Hypermetropia of less than 1 D

 D

All of the above

Ans. B

Explanation:

Ans. Myopia of 1 D


Q. 8

The end point of streak retinoscopy is:

 A

Neurtalization of the red reflex

 B

Streak disappears and the pupil appears completely light or dark

 C

Just reversal of the red reflex

 D

All of the above

Q. 8

The end point of streak retinoscopy is:

 A

Neurtalization of the red reflex

 B

Streak disappears and the pupil appears completely light or dark

 C

Just reversal of the red reflex

 D

All of the above

Ans. B

Explanation:

Ans. Streak disappears and the pupil appears completely light or dark


Q. 9

Objective assessment of the refractive state of the eye is termed

 A

Retinoscopy

 B

Gonioscopy

 C

Ophthalmoscopy

 D

Keratoscopy

Q. 9

Objective assessment of the refractive state of the eye is termed

 A

Retinoscopy

 B

Gonioscopy

 C

Ophthalmoscopy

 D

Keratoscopy

Ans. A

Explanation:

Ans. Retinoscopy

Quiz In Between


Q. 10

True regarding retinoscopy are all of the following except:     

September 2009

 A

Helps in estimating the condition of the refraction

 B

Usually performed at 1 m distance

 C

Consists of a plane and a concave mirror

 D

Hyperopes display an “against” movement

Q. 10

True regarding retinoscopy are all of the following except:     

September 2009

 A

Helps in estimating the condition of the refraction

 B

Usually performed at 1 m distance

 C

Consists of a plane and a concave mirror

 D

Hyperopes display an “against” movement

Ans. D

Explanation:

Ans. D: Hyperopes display an “against” movement

Retinoscopy is used in determining a patient’s refractive error.

It is usually performed at a distance of lm or at an arm’s length (2/3rd of a metre).

Mirror retinoscope (Priestley-Smith) has a plane mirror at one end and a concave mirror at other end.

Power corresponding to the working distance is subtracted from the gross retinoscopy value to give the patient’s refractive condition.

Myopes display an “against” reflex, which means that the direction of movement of light observed from the retina is a different direction to that in which the light beam is swept. Hyperopes display a “with” movement, which means that the direction of movement of light observed from the retina is the same as that in which the light beam is swept


Q. 11

No movement of Red reflex in retinoscopy –

 A

No refractive error

 B

Myopia of 3D

 C

Myopia of ID

 D

Hypermetropia

Q. 11

No movement of Red reflex in retinoscopy –

 A

No refractive error

 B

Myopia of 3D

 C

Myopia of ID

 D

Hypermetropia

Ans. C

Explanation:

Ans. is ‘c’ i.e., Myopia of ID

Retinoscopy

  • Retinoscopy, also called skiascopy or shadow test, is an objective method of finding out the error of refraction by the method of neutralization.
  • Retinoscopy is based on the fact that when a light is reflected from a mirror into the eye, the direction in which the light will travel across the pupil will depend upon the refractive state of the eye.
  • With the help of a retinoscope, light is thrown onto the patient’s eye and through a hole in the retinoscope’s mirror the examiner observes of red reflex in the pupillary area of the patient.
  • Then the retinoscope is moved in horizontal the vertical meridia keeping a watch on red reflex, which also moves when the retinoscope is moved.

Q. 12

Shadow test is used in ‑

 A

Keratometry

 B

Ophthalmoscopy

 C

Gonioscopy

 D

Retinoscopy

Q. 12

Shadow test is used in ‑

 A

Keratometry

 B

Ophthalmoscopy

 C

Gonioscopy

 D

Retinoscopy

Ans. D

Explanation:

Ans. is ‘d’ i.e., Retinoscopy

Retinoscopy, also called skiascopy or shadow test, is an objective method of finding out the error of refraction by the method of neutralization.


Q. 13

During retinoscopy of a 30 years old male, which cycloplegic is used routinely 

 A

Atropine 1% ointment

 B

Cyclopentolate 1% drop

 C

Homatropine 2% drop

 D

None of the above

Q. 13

During retinoscopy of a 30 years old male, which cycloplegic is used routinely 

 A

Atropine 1% ointment

 B

Cyclopentolate 1% drop

 C

Homatropine 2% drop

 D

None of the above

Ans. D

Explanation:

Ans. is ‘d’ i.e., None of the above

  • There is no need for cycloplegia as a routine in adults (20-40 years).

Cvcloplegic in retinoscopy

  • Cycloplegics are drugs which cause paralysis of ciliary muscles (accommodation) and dilatation of pupil. Theuse of cycloplegics is useful in refraction and there are certain situations where they are indicated.
  • Because of their strong accommodative reserve, very young people (< 16 years) should always be refracted after

the use of cyclopleagics : –

  1. < 5 years of age : - Atropine 1% ointment is the drug of choice.
  2. 15 – 20 years : – Homatropine (2% drop), cyclopentolate (1% drop) or tropicamide (5%, 10% drop) are used. Atropine must be used if the patient has a convergent squint or has high hypermetropia.
  • There is no need for cycloplegia as a routine in adults (20-40 years). However cycloplegics are indicated in following situations : –

Accommodation is abnormally active (e.g., spasm of accommodation).

  1. Objective findings by retinoscopy do not agree with the patient’s subjective requirement.
  2. Symptoms of accommodative asthenopia are present.
  3. If the pupil is small.
  • If the patient is above 40 years, cycloplegia is rarely necessary. Only mydriatic (10% phenylephrine) may be needed when the pupil is narrow or media is slightly hazy.

Quiz In Between



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