Aphakia

APHAKIA

Q. 1

In blunt trauma abdomen what should be the approach for doing laparotomy

 A

Depends on organ injured

 B

Always midline incision

 C

Always transverse

 D

Depends upon type of injury

Q. 1

In blunt trauma abdomen what should be the approach for doing laparotomy

 A

Depends on organ injured

 B

Always midline incision

 C

Always transverse

 D

Depends upon type of injury

Ans. B

Explanation:

Always rnidline incision [Ref: Schwartz 9/e p160 (8/e, p160)] Repeat from All India 07

All emergency abdominal explorations in adults are performed using a long midline incision because of its versatility. For children under the age of 6, a transverse incision may be advantageous.


Q. 2

Jack in box scotoma is seen after correction of Aphakia by:

 A

IOL

 B

Spectacles

 C

Contact Lens

 D

 

None

 

Q. 2

Jack in box scotoma is seen after correction of Aphakia by:

 A

IOL

 B

Spectacles

 C

Contact Lens

 D

 

None

 

Ans. B

Explanation:

Ans. Spectacles


Q. 3

Treatment of choice for Aphakia is:        

 A

Spectacles

 B

Contact lens

 C

Exercises

 D

IOL

Q. 3

Treatment of choice for Aphakia is:        

 A

Spectacles

 B

Contact lens

 C

Exercises

 D

IOL

Ans. D

Explanation:

Ans. D i.e. IOL


Q. 4

What is the magnitude of magnification when refractive correction of aphakia is done with contact lens:   

 A

1-2%

 B

8%

 C

20-30%

 D

More than 50%

Q. 4

What is the magnitude of magnification when refractive correction of aphakia is done with contact lens:   

 A

1-2%

 B

8%

 C

20-30%

 D

More than 50%

Ans. B

Explanation:

Ans. B: 8%

1-2% image magnification is seen with the use of intraocular lenses for refractive correction of aphakia

  • 8% image magnification is seen with the use of contact lenses for refractive correction of aphakia
  • 20-30% image magnification is seen with the use of spectacles for refractive correction of aphakia

Q. 5

A sign of Aphakia ‑

 A

Shallow anterior chamber

 B

White pupillary reflex

 C

Absent 1st & 2nd Purkinje images

 D

Iridodonesis

Q. 5

A sign of Aphakia ‑

 A

Shallow anterior chamber

 B

White pupillary reflex

 C

Absent 1st & 2nd Purkinje images

 D

Iridodonesis

Ans. D

Explanation:

Ans. is ‘d’ i.e., Iridodonesis

Aphakia

  • Aphakia refers to absence of crystalline lens from the eye.
  • Most common cause of aphakia is surgical removal of cataractous lens.
  • Other causes are congenital absence of lens, traumatic absorption of lens matter and posterior dislocation of lens.
  • The typical signs of aphakia are deep anterior chamber, iridodonesis (tremulousness of iris) and a dark pupillary reflex.
  • Only 1st and 2nd Purkinje images are present, 3rd and 4th are absent.
  • As the lens is not there, eye become highly hypermetropic.
  • Therefore, principle of treatment is to correct the error by convex lenses of appropriate power.
  • Intraocular lens implantation in posterior chamber is the treatment of choice.
  • Other treatment modalities are spectacles and contact lenses.

Q. 6

In aphakia purkinje images absent are ‑

 A

1 & 3′

 B

2nd & 4m

 C

2nd & 3rd

 D

3rd & 4th

Q. 6

In aphakia purkinje images absent are ‑

 A

1 & 3′

 B

2nd & 4m

 C

2nd & 3rd

 D

3rd & 4th

Ans. D

Explanation:

Ans. is ‘c’ i.e., 3rd & 4th


Q. 7

A 55 year old male with a limbal saxcr presents to the ophthalmology clinic with markedly defective vision for near & far. Clinical examination reveals a wide & deep anterior chamber, iridonesis & a dark pupillary ereflex. A vision of 6/6 is achieved with correcting lens of +11D. Which of the following is the most likely diagnosis-

 A

Aphakia

 B

Pseudophakia

 C

Hypermetropia

 D

Posterior Dislocation of Lens

Q. 7

A 55 year old male with a limbal saxcr presents to the ophthalmology clinic with markedly defective vision for near & far. Clinical examination reveals a wide & deep anterior chamber, iridonesis & a dark pupillary ereflex. A vision of 6/6 is achieved with correcting lens of +11D. Which of the following is the most likely diagnosis-

 A

Aphakia

 B

Pseudophakia

 C

Hypermetropia

 D

Posterior Dislocation of Lens

Ans. A

Explanation:

Markedly defective vision for both near & far, a deep anterior chamber, iridodonesis & a dark pupillary reflex all suggest a diagnosis of Aphakia.

A limbal scar further points to the likelihood of surgical aphakia.

Vision of 6/6 in aphakic eye can be achieved with a corrective lens about 10D or 11D if the eye was previously emmetropic.



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