XXXX : improvement in eye movements after surgical treatment.

@entity1 @entity66 @entity2358 @entity1645 @entity346
We studied @entity2358 in five @entity1 with @entity1645 before and after suboccipital decompression. Before operation all @entity1 complained of oscillopsia at rest and visual blurring of fixated targets during and immediately after their heads were in motion. Three @entity1 had @entity346 , one @entity1 had @entity346 in the primary position and on eccentric gaze and one @entity1 had @entity346 on lateral gaze only. Smooth pursuit, @entity346 were markedly impaired. Within two months after operation nystagmus in the primary position had resolved in three @entity1 , and four had complete to near-complete resolution of nystagmus in all gaze positions over subsequent months. Oscillopsia decreased concurrently. affording significant functional visual improvement. One @entity1 had only slight functional improvement and continued to have prominent nystagmus seven years after operation. Smooth pursuit, @entity346 improved in all @entity1 , but none had complete recovery at the higher velocities of stimulation. They still complained of visual blurring associated with head motion, probably due to the poor fixation suppression of @entity346 . Our findings suggest that @entity2358 in @entity1645 are due to compression of the herniating cerebellum against the caudal brain-stem and not a congenital aberrancy of oculomotor pathways. @entity346 resolved more readily than pursuit or fixation @entity66 , but most @entity1 showed gradual improvement in all abnormalities four months after operation.
