<prompt> Which of the following is true about multiple sclerosis exceptNystagmus on abducting eyeNystagmus on adducting eyeOne and half syndromePendular nystagmus  <response>: . Multiple sclerosis is characterised by prominent nystagmus which is observed in the abducting eye,along with a small skew detion . A bilateral internuclear ophthalmoplegia is paicularly suggestive of MS Other common gaze disturbances in MS include 1 horizontalgaze palsy 2a one and halfsyndrome 3acquired pendular nystagmus . Ref Harrison20th edition pg 2567 