3f. Restrictive, Comitant Squint Flashcards
(12 cards)
Q: What is restrictive squint?
A: A type of squint where mechanical or fibrotic restriction prevents normal eye movement.
Q: What is the most common cause of restrictive strabismus?
A: Thyroid eye disease (Graves’ orbitopathy).
Q: What test is used to differentiate restrictive from paralytic squint?
A: Forced duction test.
Q: What is comitant squint?
A: A squint in which the angle of deviation is the same in all directions of gaze.
Q: What is the commonest type of strabismus in children?
A: Comitant esotropia.
Q: Which extraocular muscle is most commonly involved in thyroid ophthalmopathy?
A: Inferior rectus.
Q: What is the cause of monocular elevation deficit (double elevator palsy)?
A: Restriction of both superior rectus and inferior oblique, or supranuclear inhibition.
Q: What is the eye movement defect in blowout fracture of the orbit?
A: Restriction of upgaze due to inferior rectus entrapment.
Q: In thyroid orbitopathy, what is the earliest sign of restrictive strabismus?
A: Limitation of elevation.
Q: What is the most reliable test to confirm restrictive pathology?
A: Positive forced duction test.
Q: What is the primary surgical approach for comitant squint?
A: Recession-resection procedures.
Q: What distinguishes restrictive squint from paralytic squint on saccadic velocity testing?
A: Normal saccadic velocity in restrictive squint; reduced in paralytic.
