OFISA Ophthalmic forum of Indian Society of Anaesthesiologists

Quiz

1. The safe needle entry point for inferolateral quadrant block

A. Medial 2/3rd and Lateral 1/3rd of the orbital floor
B. Medial 1/3rd and Lateral 2/3rd of the orbital floor
C. Extreme inferolateral junction of the orbital wall
D. Just medial to Medial 2/3rd and Lateral 1/3rd of the orbital floor

2. Among the four orbital walls the thickest of all is:

A. Medial orbital wall
B. Floor
C. Lateral orbital wall
D. Roof

3. The extra ocular muscle that doesn’t originate from the orbital apex

A. Inferior rectus
B. Inferior oblique
C. Superior rectus
D. Superior oblique

4. The orbital axis and visual axis diverge at an angle of

A. 90 degree
B. 45 degree
C. 23 degree
D. 180 degree

5. The volume of the eye ball

A. 3ml
B. 6ml
C. 9ml
D. 12ml

6. The total volume of the orbit

A. 10ml
B. 20ml
C. 30ml
D. 40ml

7. In a medial peribulbar block, which of the following statement is not correct:

A. The block is usually administered using 26G ½ inch steel needle
B. It can be administered as a primary injection for high myope
C. The bevel of the needle should face the globe
D. The tip is passed in a blind pit between the medial caruncle and canthus

8. The use of cocaine as a topical anaesthetic agent for cataract surgery was first described by

A. Anderson
B. Carl Koller
C. Knapp
D. Koornneef

9. The method of achieving oribcularis akinesia by blocking the facial nerve at the proximal trunk, just in front of the tragus of the ear over the condyloid process of the mandible is called

A. Atkinson block
B. Van Lint Block
C. O’Brien block
D. Nadbath block

10. One of the following about the superior orbital fissure is false:

A. It connects the middle cranial fossa with the orbital cavity
B. It lies between the roof and lateral walls of the orbit
C. The widest part of the fissure is at its medial end
D. It lies between the greater wing of the sphenoid and the maxilla