Monocular elevator paresis in neurofibromatosis type 2

A retrospective review of 29 consecutive unselected patients referred for n euro-ophthalmic evaluation after the diagnosis of neurofibromatosis type 2 (NF2) showed that four of them had a monocular elevator paresis. Ln two of the four MRI demonstrated lesions, presumed to be schwannomas, of the third nerve. These findings indicate that monocular elevator paresis is a common neuro-ophthalmic finding in NF2, which the authors suspect is probably a s ign of third nerve infiltration or compression by a schwannoma.