PURPOSE To study size and contractility of the normal inferior oblique (IO) muscle using high-resolution magnetic resonance imaging (MRI) and to evaluate abnormalities of the superior oblique (SO) and IO muscles in chronic SO palsy. DESIGN Prospective, case control study. PARTICIPANTS Thirteen patients with SO palsy and 17 orthotropic subjects. METHODS High-resolution, surface coil MRI wa...

PURPOSE To evaluate the effects of bilateral inferior oblique transposition (BIOT) on horizontal deviation from primary position among patients with bilateral dissociated vertical deviation (DVD) associated with inferior oblique overaction (IOOA) in infantile strabismus. METHODS Retrospective chart review was conducted among 19 patients with infantile strabismus. All patients had DVD and IOOA...

PURPOSES To objectively evaluate the torsional effect of the superior oblique muscle-weakening surgery using the tenectomy technique proposed by Souza-Dias. METHODS The present prospective study included 10 patients (20 eyes) with horizontal strabismus, bilateral superior oblique overaction and A-pattern of 15 to 30 prism diopters who underwent superior oblique tenectomy. Objective assessment...

To the Editors: Ocular motility problems related to congenital abnormalities of the extraocular muscles are rare. Such congenital abnormalities may present in a spectrum from accessory additional rectus muscles to the absence of extraocular muscles.1-5 Absence of one or more extraocular muscles is a rare condition usually seen in association with craniofacial syndromes. We present a case of bil...

PURPOSE To evaluate the outcomes of botulinum toxin injection into the inferior oblique (IO) muscle for management of unilateral acute traumatic superior oblique (SO) palsy. METHODS In this prospective case series, 10-20 units of botulinum toxin A (Dysport, Ipsen, Biopharm Ltd., Wrexham, UK) was injected into the ipsilateral IO muscle of 13 consecutive patients with unilateral acute traumatic...

OBJECTIVE To explore the mechanisms underlying the hypertropia associated with unilateral coronal synostosis. METHODS In 13 patients with unilateral coronal synostosis, we measured gaze-dependent binocular alignment before and after strabismus surgery, assessed the superior rectus muscle (SRM) pulley using computed tomography, and simulated posterior displacement of the trochlea and superolat...

Objective: Aim of this study was to evaluate possible risk factors affecting stereopsis in patients with refractive accommodative esotropia (RAE). Materials and Methods: The retrospective investigation performed on the records children RAE. Two groups were made according presence stereopsis. presumed onset age RAE, at initial correction, mean best-corrected visual acuity (BCVA), angle deviation...

W e read the published article entitled " An anatomical study of the inferior oblique muscle with emphasis on its nerve entry " by Kumar et al. (1) This study described the entry of the inferior division of the oculomotor nerve to the inferior oblique muscle and the topographical anatomy of the muscle. We would like to take this opportunity to share some important scientific facts. We agree wit...

BACKGROUND Several inferior oblique (IO) weakening methods exist for correction of superior oblique palsy (SOP). A previously reported method involved recession and anteriorization according to IO overaction (IOOA) grade, which might be subjective and cause upgaze limitation and opposite vertical strabismus. Therefore, this study attempted to examine the efficacy of modified graded recession an...