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Opt 215 ch. 1
Test 1 chap. 1
11
Other
Not Applicable
10/11/2007

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Cards

Term

What phenomena says that we can see an object at a lower threshold with two eyes than with one?

Definition
binocular summation
Term
What phenomena allows for 360 degrees of vision?
Definition
Panoramic vision
Term
How much do human visual fields of each eye overlap?
Definition
120 degrees
Term
What part of the visual field is seen by each eye alone?
Definition
the temporal crescents
Term
How do you distinguish eccentric viewing and eccentric fixation?
Definition
Eccentric viewing is voluntary
Term
How do you know if a patient has eccentric fixation.
Definition
Ask them to look directly at the opthalmoscope.  If you don't see the fovea in the middle, they're using an extrfoveal point to fixate.
Term
What causes past pointing?
Definition
a paretic eye muscle, the patient has to send more neural signal than it should to move his eye to a point in space
Term
What is the name for a given position of the eye in the head, objects lying on the same line of sight are seen in the same headcentric direction?
Definition
law of head centric localization
Term
The eye that is open when you see the target through your hands is the ____ eye?
Definition
dominant eye
Term
To which eye do you supply the better correction?
Definition
the dominant eye
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