Term
|
Definition
|
|
Term
|
Definition
|
|
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
|
|
Term
|
Definition
| A plus add for near based on patient's phoria and AC/A and checked with MEM (opt 2 is VT) |
|
|
Term
|
Definition
| Overminused or underplused lenses for young children (opt 2 is VT or patching) |
|
|
Term
| Tx of Normal AC/A conditions |
|
Definition
|
|
Term
|
Definition
| Base Out Prism (However if no diplopia, no tx needed) |
|
|
Term
|
Definition
| Base In Prism (minimum amt to fusion) (However if no diplopia, no tx needed) |
|
|
Term
|
Definition
| Convergence VT to increase PRC (BO ranges) |
|
|
Term
|
Definition
| Base Out Prism at far (if symptomatic) |
|
|
Term
| What effect do prisms and pencil pushups have on a CI patient? |
|
Definition
|
|
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
|
|
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. |
|
|
