Posición primaria de la mirada en hiperfunción de oblicuos inferiores con y sin desviación vertical disociada

Abstract

IntroductionWhen dissociated vertical deviation (DVD) is associated with vertical action muscles overaction, it is very important to define which part of the vertical deviation is due to the DVD and which one due to the overaction by itself, especially in the indication of surgical treatment (selection muscles and surgical technique to be used). The primary position (PP) may be different in inferior oblique muscle overaction when it's associated to DVD and it can be a clinical data which allows us to identify it. ObjectiveDemonstrate what is the PP in patients with inferior oblique muscle overaction with or without DVD. MethodsObservational, transversal and comparative study, it was included patients with inferior oblique muscle overaction with or without DVD of the strabismus service; a complete ophthalmological examination was performed. For statistical analysis Fisher's exact test was used. ResultsThere were in total 46 patients. 24 patients (52.17%) had DVD. The PP found in patients with overactive inferior oblique and DVD: double hypertropia in 14 (58.33%), hyper-hypotropia 8 (33.33%), and 2 patients in orto-position (8.33%). In patients with overactive inferior oblique without DVD, the PP was hyper-hypotropia found in 19 (86.36%) and 3 patients orto-position (13.64%). Findings statistically significant (p<0.05). ConclusionsIn patients with inferior oblique muscle overaction with DVD prevails double hypertropia in the PPM and in patients with inferior oblique muscle overaction without DVD prevails hyper-hypotropia, with a statistically significant difference.