Masked bilateral superior oblique paresis.
Masked bilateral superior oblique paresis which was unsuspected occurred in 9 out of 57 cases. In every case of superior oblique paresis, bilaterality should be presumed until proven otherwise. Maximum attention on multiple examinations should be utilized to elicit the slightest contralateral inferior oblique overaction.
D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D009801:Oculomotor Muscles / Q000503:physiopathology*; D009886:Ophthalmoplegia / Q000503:physiopathology*