3c. Squint: Investigations Flashcards
(15 cards)
What is the most basic test for squint detection?
Hirschberg test
In the Hirschberg test, 1 mm decentration of corneal reflex indicates approximately how many prism diopters of deviation?
15 prism diopters
What does the cover-uncover test primarily detect?
Manifest squint (tropia)
What does the alternate cover test detect?
Latent squint (phoria)
Which test assesses binocular single vision and suppression?
Worth four-dot test
What is the use of Maddox rod test in squint?
To detect and measure phoria (especially latent deviations)
Which instrument is used to measure the angle of deviation?
Prism bar or synoptophore
What is the Bagolini striated glass test used for?
To detect suppression and retinal correspondence
What investigation is done to differentiate a paralytic from a restrictive squint?
Forced duction test
Which test evaluates the sensory and motor fusion capability of the patient?
Synoptophore
In the Hirschberg test, a reflex at the limbus suggests how much exotropia?
~45 prism diopters
What does a positive forced duction test indicate?
Mechanical restriction (e.g., fibrosis, trauma)
Which test is preferred for assessing objective angle of deviation in children?
Krimsky test
What does the red filter test help in detecting?
Diplopia and suppression
How is abnormal retinal correspondence identified?
Using synoptophore or Bagolini test
