PURPOSE To determine the effect of horizontal rectus muscle surgery on visual acuity, head posture and electronystagmographic indices in patients with congenital nystagmus. METHODS This prospective comparative case series was conducted on 58 patients with congenital nystagmus over a period of three years. Patients were divided into three groups: the first group (29 cases) had head posture les...

PURPOSE To evaluate the surgical results of asymmetric bilateral lateral rectus recession in exotropic Duane retraction syndrome with abnormal face turn toward the opposite side according to secondary deviation measurements. METHODS Retrospective chart review. RESULTS Seven cases of unilateral exotropic Duane retraction syndrome were reviewed. All cases had globe retraction on adduction and...

Five patients underwent a muscle union procedure with medial rectus recession. The mean preoperative esotropia in the primary position was 51.0 ± 20.1 prism diopters [PD] (range: 20 to 75 PD). The mean follow-up period was 6.2 ± 2.1 months (range: 3 to 8 months). The mean decrease in esotropia in the primary position was 49.0 ± 18.0 PD (range: 18 PD to 63 PD). The mean postoperative angle in th...

PURPOSE Although the rectus abdominis and its sheath are well known structures, their development in the human fetus is poorly understood. MATERIALS AND METHODS We examined rectus abdominis and sheath development in semiserial horizontal sections of 18 fetuses at 5-9 weeks of gestation. RESULTS Rectus muscle differentiation was found to commence above the umbilicus at 6 weeks and extend inf...

Myotonic dystrophy type 1 (DM1) is caused by CTG repeat expansion in the DMPK gene in chromosome 19q13.3. External ophthalmoplegia is a rare manifestation in DM1. We report a DM1 patient confirmed by the presence of 650 CTG triplet expansions in the DMPK gene and had limitation of adduction gaze bilaterally. Brain MRI showed bilateral medial rectus muscles atrophy. Our patient provides addition...