Introduction to Ocular Motility Extraocular Muscles EOM ...
Introduction to Ocular Motility Extraocular Muscles EOM ...
Introduction to Ocular Motility Extraocular Muscles EOM ...
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Vergence<br />
Disconjugate movements of the eyes.<br />
Movement in opposite directions.<br />
Convergence<br />
Convergence – Both eyes turn in<br />
Divergence Divergence – Both eyes turn out<br />
Vertical Vertical vergence – One eye moves up,<br />
the other down<br />
Strabismus<br />
<strong>Ocular</strong> misalignment that prevents bifoveal<br />
fixation.<br />
Non-parallel Non parallel visual axes.<br />
Fixation<br />
Central Fixation<br />
Using Using the fovea <strong>to</strong> fixate<br />
Eccentric Fixation<br />
Using Using a non-foveal non foveal retinal point <strong>to</strong> fixate<br />
Bifoveal fixation<br />
Using Using both foveas <strong>to</strong> fixate the same<br />
object at the same time.<br />
Convergence amplitudes<br />
Measure with base out<br />
prism bar at distance<br />
and near.<br />
Minimum normal<br />
20 prism diopter at<br />
near<br />
12 at distance<br />
Fixation<br />
Maintaining the position of the eye so<br />
that the image of the object of regard<br />
falls on the fovea.<br />
Fovea<br />
Central Fixation<br />
5
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