Ophthalmology Flashcards
1
Q
What constitutes a “long eye”?
A
> 26mm
1
Q
What is the average globe length?
A
23mm
2
Q
A
2
Q
When is a “long eye” suspected?
A
Myopia (short sightedness)
3
Q
What procedures is the oculocardiac reflex most commonly seen? (3)
A
Paediatric cases
Squint surgery
Vitreoretinal surgery
4
Q
What is the trigger for the oculocardiac reflex?
A
Traction of the extraocular muscles
5
Q
Describe the course of the oculocardiac reflex.
A
Tension on muscles → long + short clliary nerves → synapse in the gasserian ganglion → trigeminal nerve synapse in the brainstem at the sensory nucleus of the trigeminal nerve → vagus nerve projects to the SAN
6
Q
What is a suitable pre-med for a paediatric case for prevention of the oculocardiac reflex.
A
Glycopyrronium 10mcg/kg
7
Q
A
