BV 9 - MT and IST

Card Set Information

Author:
sookylala
ID:
290426
Filename:
BV 9 - MT and IST
Updated:
2014-12-02 09:20:36
Tags:
microtropia infantile esotropia
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Description:
MT IST
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  1. what are the key features of MT?
    • Manifest angle <10PD
    • central foveal suppression of deviating eye
    • AC
    • Amblyopia
    • Reduced stereo- present but <40sec of arc
  2. What are associations of MT?
    EF and anisometropia
  3. Manifest angle with MT?
    • UCT: usually small
    • ACT: HUGE angle after prolonged occlusion
  4. What is the simultaneous CT?
    • It measures the manifest strab with a latent component
    • Prism: deviating eye
    • Occluder: fixation eye
    • Add prism til no eye movement
  5. How to detect foveal suppression in MT?
    • 4BO test
    • bagolini- lines missing
  6. Management of MT?
    • rule out pathology
    • improve VA of amb eye- use little occlusion as can increase angle - from latent to manifest
    • maintain VA
  7. IST features?
    • Primary deviation
    • comitant
    • 50% have >+2D- non accommodative
    • usually >30PD
    • same mag at all dx
    • Magnitude is constant (usually AC)
  8. What are some assocations of IST?
    • amblyopia if one eye
    • cross fication- switch eyes in diff gazes
    • latent nystagmus
    • DVD
    • overacting IO

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