Shared Flashcard Set

Details

Exam 1 Neurology of Vergence
lecture #7
18
Medical
Graduate
06/12/2012

Additional Medical Flashcards

 


 

Cards

Term
SOA
Definition
Supra-Oculomotor Area
Term
Q
Definition
A
Term
What is the heterophoria method equation of determining a patient's AC/A ratio?
Definition
AC/A = PD [in cm] + (Dn - Dd) / power of lens
Term
Tx of High AC/A conditions
Definition
Lenses
Term
Tx of CE
Definition
A plus add for near based on patient's phoria and AC/A and checked with MEM (opt 2 is VT)
Term
Tx of DE
Definition
Overminused or underplused lenses for young children (opt 2 is VT or patching)
Term
Tx of Normal AC/A conditions
Definition
Prism
Term
Tx of Basic eso
Definition
Base Out Prism (However if no diplopia, no tx needed)
Term
Tx of Basic exo
Definition
Base In Prism (minimum amt to fusion) (However if no diplopia, no tx needed)
Term
Tx of CI
Definition
Convergence VT to increase PRC (BO ranges)
Term
Tx of DI
Definition
Base Out Prism at far (if symptomatic)
Term
What effect do prisms and pencil pushups have on a CI patient?
Definition
Only placebo
Term
Why might VT not be effective on a CI patient?
Definition
Because CI can be caused by pathology, too. (eg. Parkinson, Progressive Supranuclear Palsy, mild head trauma, cerebral lesions)
Term
DI must be differentiated from what nerve palsy?
Definition
Bilateral VI nerve palsy
Term
What is Duane Retraction Syndrome
Definition
A congenital absence of VI nerve nucleus. Causes globe retraction when multiple recti muscles are recruited at once (which is also seen with nystagmus-inducing pineal tumors).
Term
What could be to blame for a temporary eso deviation upon horizontal return to primary gaze?
Definition
Pineal tumor or a problem with the fastigial nucleus in the cerebellum
Term
What type of short-term, benign, "party trick" nystagmus can some people induce?
Definition
Convergence-Induced Nystagmus
Term
What surprising occasional characteristic of INO (Internuclear Ophthalmoplegia) seems a bit paradoxical?
Definition
Convergence is intact even though one medial rectus does not appear to work in secondary gaze.
Supporting users have an ad free experience!