Convergence Flashcards
LR6SO4 all other EOMs 3
What CNs innervates the EOMs?
Convergence
The function, whereby the eyes turn in to maintain single vision
Fusion meter angles
Total amount of turning in of two eyes to fixate at a distance (dioptric stimulus)
Inter pupillary distance
Distance between the two eyes
Amplitude of convergence
What is the prism diopter stimulus to converge?
Reciprocal of distance x PD in cm
How do you calculate the stimulus to converge?
Duction
What is a monocular eye movement called?
Version
What is the parallel movement of both eyes called?
Vergence
What is the non parallel movement of both eyes called?
Adduction
Movement of the line of sight of one eye toward the body’s midline
Abduction
Movement of the line of sight of one eye away from the body’s midline
Supraduction
Movement of the line of sight of one eye above the straight ahead position/primary gaze
Infraduction
Movement of the line of sight of one eye below primary gaze
Dextroversion
Parallel movement of both eyes to the right
Levoversion
Parallel movement of both eyes to the left
Supraversion
Parallel movement of both eyes upward
Infraversion
Parallel movement of both eyes downward
Convergence
Movement of lines of sight toward the body’s midline or towards each other
Divergence
Movement of lines of sight away from the body’s midline or away from each other
Fusional vergence
Convergence movement with no associated change in accommodation
PFV
What type of fusional vergence does an exophore use?
NFV
What type of fusional vergence does an esophore use?
Phoria
What is it called when the lines of sight meet at the same point, after any tendency has been overcome?
Orthophoria
Two eyes converge directly on the target with no tendency to turn in or out, up or down