internuclear ophthalmoplegia

Internuclear ophthalmoplegia is damage to the horizontal eye movements caused by damage to certain relationships between nerve centers in the brain stem .


CAUSE


In internuclear ophthalmoplegia , nerve fibers that coordinate both eyes on the horizontal - motion look from side to side - broken . This connective fibers converge on nerve cell ( the middle or nuclei ) derived from the 3rd cranial nerve ( oculomotor nerve ) and 6th cranial nerve ( abducens nerve ) . In older people , the disorder usually resulting from stroke , and only one eye is affected . In older people typically impaired due to stroke da only one eye is affected . Not often causes include Lyme disease , tumors , and toxicity caused by a drug ( such as tricyclic antidepressants ) .


SYMPTOMS


Horizontal eye movements are weak , but not the vertical section . Affected eye can not be turned into, but it can turn out. When the sight of the opposite side of the affected eye , the following things will happen :


* Eyes are exposed , which should be turned inward , unable to move past the midline . Where , the affected eye looks straight ahead .
* As with other eye turned out , it often happens accidentally , repetitive blinking movement called nystagmus . Where , rapid eye movements in a single command , then slowly diverge in other commands .


People with internuclear ophthalmoplegia may experience double vision .


Syndrome is a one - and- a- half is generated when the disorder that causes internuclear ophthalmoplegiajuga damage the central coordinating and controlling the horizontal eye movements ( horizontal gaze center ) . When people are trying to look to the other side , the affected eye remains motionless in the middle . The other eye can be turned to the outside but not inside . As internuclear ophthalmoplegia , vertical eye movements are not affected .


At internuclear syndrome ophthalmoplegiadan one- and- a- half , the eyes can be turned inward when the person to the vision ( when focusing on a nearby object ) even though the eye can not be turned into when the person is looking to the side .


TREATMENT


For internuclear ophthalmoplegia syndrome or one- and- a- half , the treatment and the view ( whether the disorder abated or cured as soon as possible ) depending on the disorder causing it .