1. Superior oblique palsy: diagnosis and classification;Ellis;Int Ophthalmol Clin,1976
2. Superior oblique palsy and superior oblique myokymia;Plager;Clin Strabism Manage,1999
3. Sensitivity of the three-step test in diagnosis of superior oblique palsy;Manchandia;J AAPOS,2014
4. Congenital superior oblique palsy and trochlear nerve absence: a clinical and radiological study;Yang;J Ophthalmol,2012
5. Association of superior oblique muscle volumes with the presence or absence of the trochlear nerve on high-resolution MR imaging in congenital superior oblique palsy;Yang;Am J Neuroradiol,2015