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Opt 220 Theory test 2
Mormon
11
Other
Not Applicable
04/08/2008

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Cards

Term

Images of a ______ ______ object do not stimulate exactly corresponding points but fall within _____ _____ _____ and thus the object is seen as a single image.

Definition
  1. fixation disparity
  2. Panum's fusional area
Term
This indicates there is a slight ____-_____ (eso fixation disparity) or a slight ______ (exo fixation disparity)
Definition
  1. overconvergence
  2. underconvergence
Term
When measuring an associated phoria, what type of phoria is indicated if the top line is to the right of the bottom line?
Definition
eso fixation disparity
Term
When measuring an associated phoria (Vectographic slide, or BVAT), what type of phoria is present if the patient sees the top line to the left of the bottom line?
Definition
Exo fixation disparity
Term
When doing a BVAT or a vectographic slide test, the amount of prism needed to line up the marks is called what?
Definition
associated phoria
Term
What type of phoria do cover test, Von Graefe, and Maddox rod measure?
Definition
Dissociated phoria
Term
Which type of phorias are usually larger?
Definition
dissociated phorias
Term
What would you say about someone who has had an exo cover test (dissociated) but an eso (associated) fixation  disparity?
Definition

They're a CI who has done some god vision therapy work.

Term
What effect does a presbyopic add power have on a patients phoria?
Definition
makes him more exophoric
Term

Is binocular balance more important for patients with high or low prescription correction?

Definition
high prescription
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