Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
42 Cards in this Set
- Front
- Back
|
The _____ is the portion of space which is visible when gaze is fixed in one direction.
|
visual field
|
|
|
______ is the measurement of the visual field.
|
perimetry
|
|
|
Can perimetry help you find the location of a brain lesion?
|
yes (based on the pattern of visual field loss)
|
|
|
Perimetry is a ______ test.
|
neurological
|
|
|
Name 6 tests that are neurological.
|
1- VA
2- EOM 3- cover test 4- pupils 5- confrontational fields 6- perimetry |
|
|
VA mearsures _____ function.
|
foveal
|
|
|
Visual field measures _______ function.
|
extra-foveal
|
|
|
Visual fields use _________. (must detect the presence of a spot of light against a slightly darker background.
|
contrast sensitivity
|
|
|
Decribe a normal visual field.
|
It is a distorted "radar scope" picture extending in all directions.
|
|
|
What 4 features make the normal visual field slightly distorted?
|
1- nose
2- brow 3- cheeks 4- lips |
|
|
What are the 4 limits (in degrees)?
|
1- Nasal=60
2- Temporal = 100 3- superior= 60 4- inferior= 75 |
|
|
Is it possible for a patient to not really notice a visual field defect.
|
yes
|
|
|
In the lsland of vision, what does the height measures ______.
|
contrast sensitivity
|
|
|
Every point on the landscape of the island corresponds to a _________.
|
spot on the retina
|
|
|
Are you very sensitive at the edge of the lsland?
|
no
|
|
|
What does cecal mean?
|
around the optic nerve
|
|
|
The pit of the island represents the ____.
|
ONH
|
|
|
Who invented the island of vision?
|
Traquair
|
|
|
The fovea responds of a ___ stimulus and a ____ stimulus.
|
dim and small
|
|
|
The peripheral retina requires a ___ and ___ stimulus.
|
bright large
|
|
|
The fovea has a ___ contrast sensitivity.
|
high
|
|
|
The peripheral retina perfers _____ contrast sensitivity.
|
low
|
|
|
The pit of the island is located ___ degrees from fixation and ___ degrees below the horizontal meridian.
|
15.5, 1.5
|
|
|
In ___ perimetry the target moves and the stimulus remains ____.
|
kinetic, constant
|
|
|
In ____ perimetry the target is ____ and the stimulus ____.
|
stationary, varies
|
|
|
What is an example of static perimetry?
|
finger counting
|
|
|
In kinetic perimetry, the target will move but the ___ and ____ remains fixed.
|
brightness, size
|
|
|
What does the result of kinetic perimetry represent?
|
threshold
|
|
|
Kinetic perimetry produces a _____ image. This is called an ______.
|
2D, Isopter
|
|
|
In the isopter: the lines are of equal ________.
|
contrast sensitivity
|
|
|
You must get mulitple ____ to get a full 3D picture.
|
isopters
|
|
|
In static perimetry the target in stationary but the _____ varies.
|
brightness
|
|
|
Does static perimetry represent the threshold for the stimulus?
|
yes (so does kinetic)
|
|
|
Joining the threshold points from the static perimetry produces a ______ picture.
|
3D
|
|
|
Manual visual fields are _____ automated.
|
NOT
|
|
|
Field limits are an example of ______ perimetry.
|
kinetic
|
|
|
Visual field defects are characterized by (name 4 things).
|
1- shape/pattern
2- position with regard to fixation 3- position with regard to retinal anatomy 4- depressions/margins |
|
|
What are 4 defects with regard to shape.
|
1- arcuate
2- ring 3- oval 4- round |
|
|
What are 3 defects with regard to pattern.
|
1- hemianopsia
2- quadrantanopsia 3- altitudinal |
|
|
Hemianopsia respects the ____ meridian.
|
vertical
|
|
|
altitudinal repects the ____ meridian.
|
horizontal
|
|
|
______ means that the patterns in the visual field are not symmetric.
|
Incongruous
|
