▁ ▁Mus cle ▁dise ases ▁( e . g . ▁My as then ia ▁gra vis ) ▁ ▁Or b ital ▁anom al ies ▁ ▁T um or ▁( e . g . ▁r hab dom y os ar com a ) ▁ ▁Ex cess ▁fat ▁behind ▁glo be ▁( e . g . ▁thy roid ▁conditions ) ▁ ▁B one ▁f ract ure ▁ ▁Check ▁lig ament ▁( e . g . ▁Brown ' s ▁synd rome , ▁or ▁Super ior ▁tend on ▁she ath ▁synd rome ) ▁ ▁Selected ▁dis orders ▁▁ ▁Cong en ital ▁fourth ▁n erve ▁p als y ▁ ▁Du ane ▁synd rome ▁ ▁Intern uc lear ▁o ph th alm op leg ia ▁ ▁N yst ag mus ▁ ▁O ph th alm op ares is ▁ ▁O ps oc lon us ▁ ▁Six th ▁( ab du cent ) ▁n erve ▁p als y ▁ ▁V ision ▁ther apy ▁ ▁In ▁psych other apy ▁ ▁Term in ology ▁The ▁following ▁terms ▁may ▁be ▁used ▁to ▁describe ▁eye ▁movement : ▁ ▁In cy cl ot ors ion ▁is ▁a ▁term ▁applied ▁to ▁the ▁in ward , ▁t ors ional ▁( rot ational ) ▁movement ▁of ▁the ▁eye , ▁medi ated ▁by ▁the ▁superior ▁ob lique ▁mus cle ▁of ▁the ▁eye . ▁The ▁superior ▁ob lique ▁mus cle ▁is ▁inner v ated ▁by ▁c ran ial ▁n erve ▁IV ▁( t ro ch lear ▁n erve ). ▁In cy cl ot ors ion ▁may ▁also ▁be ▁used ▁to