Der Ophthalmologe : Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
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Randomized Controlled Trial Comparative Study Clinical Trial
[Motor blockade by retrobulbar anesthesia. Phenomenology and mechanism of action].
The aim of this study was to analyze quantitatively the phenomenology and mechanisms of motor blockade induced by retrobulbar anesthesia (RETRO). ⋯ The present findings may be interpreted as temporary palsy of N.III and N.VI during RETRO (symmetrical blockade of horizontal and vertical recti eye muscles) with unaffected function of N.IV and superior oblique muscle (maintained incycloduction ability; hypotropia and exotropia). An additional possible mechanism to account for the observed downward deviation is that the eye assumes its physiological divergent resting position during RETRO.