Duanes Retraction Syndrome

Question 1

Aetiology

Answer 1

Innervation of lateral rectus by extra branches of 3rd nerve
Considered mechanical

Question 2

What is type 1 Duane’s

Answer 2

• limitation of abduction
• widening of palpebral fissure due to lack of innervation
• normal or slight limitation of adduction with narrowing of palpebral fissure

Question 3

Type 2 Duane’s

Answer 3

• limitation of adduction
• co-contraction of horizontal recti on attempted adduction
• normal or slightly reduced abduction

Question 4

Type 3

Answer 4

Limitation of adduction and abduction

Question 5

Clinical features of Duane’s

Answer 5

• globe retraction on adduction
• narrowing of palpebral aperture
• strabismus and face turn