PurposeThis study was designed to assess and compare the thicknesses of the fovea and the retinal nerve fiber layer in normal children and children with amblyopia.MethodsOptical Coherence Tomography (OCT) was performed on 26 children (52 eyes total) with unilateral amblyopia that was due to anisometropia or strabismus. OCT was also performed on 42 normal children (84 eyes), for a total of 136 eyes. Retinal thickness measurements were taken from the fovea, and the retinal nerve fiber layer thickness measurements were taken from the superior, inferior, nasal and temporal quadrants in the peripapillary region.ResultsThe average age of the normal children was 8.5 years, and the average age of the children with amblyopia was 8.0 years. The average thickness of the fovea was 157.4 µm in normal eyes and was 158.8 µm in amblyopic eyes. The difference between the two groups was not statistically significant (p=0.551). The thicknesses of the superior, inferior, nasal and temporal quadrants of the retinal nerve fiber layer between the normal children and the children with amblyopia were also not statistically significant (p=0.751, 0.228, 0.696 and 0.228, respectively). However, for the children with anisometropic amblyopia and the children with strabismic amblyopia, the average thicknesses of the fovea were 146.5 µm and 173.1 µm, respectively, and the retinal nerve fiber layer thicknesses were measured to be 112.9 µm and 92.8 µm, respectively, and these were statistically significant differences (p=0.046, 0.034, respectively).ConclusionsNormal thicknesses of the fovea and the retinal nerve fiber layers were established, and there were no differences in the fovea and the retinal nerve fiber layer thickness found between normal children and children with amblyopia.
PurposeThe purpose of this study was to compare and differentiate the clinical characteristics of intermittent exotropia (X(T)) in children and adults.MethodsThis study included 398 patients with X(T): 360 children ranging in age from 1 to 14 years and 38 adults over 15 years of age. Patients with neurological abnormalities or developmental delays were excluded. Clinical characteristics of interest included sex, age on first visit, age of onset, type of onset, duration to surgery, family history, chief complaints, type of fixation, refractive errors, sensory tests, angle of deviation, fundus examination, oblique muscle dysfunction, and other associated ocular disorders.ResultsIn both groups, an insidious onset was more common than a sudden onset (p=0.033). Outward deviation was the most common chief complaint in both groups, followed by photophobia in the childhood group, and diplopia in the adult group. The most common subtype of X(T) was the basic type. The mean near deviation was 23.6±7.9 prism diopters (PD) in the childhood group and 30.7±12.2 PD in the adult group (p=0.01). The mean distance deviation was 23.4±6.1 PD and 28.3±11.2 PD in the childhood and adult groups, respectively (p=0.028). The rate of fusion, measured with the Worth 4-dot test at near and distance was higher in the childhood group, as compared to the adult group (p=0.024 and p=0.048, respectively).ConclusionsAmong X(T) patients, the chief complaints, angle of deviation, and Worth 4-dot tests showed significant differences between the childhood and adult groups. Therefore, these are important factors to consider when assessing adults and children with X(T).
PurposeThe surgical technique for intermittent exotropia 「X(T)」 is quite simple. However, in many cases, the condition recurs due to any one of a number of causes, including undercorrection. This study examined the factors associated with undercorrection on X(T) patients.MethodsThe study examined 199 X(T) patients who underwent bilateral recession of the lateral rectus muscle or unilateral recession of the lateral rectus muscle and resection of the medial rectus muscle, and who were followed-up for more than a year. Patients whose near and far distance angles of deviation were 9 prism diopters (PD) or more at one year after surgery were designated as group 1. Those whose PD was 8 or below or who had orthophoria were assigned to group 2. Various factors were compared and analyzed.ResultsOne day after surgery, group 1 showed an average overcorrection of 1.9 and 4.1 PD at near and far, respectively, and group 2 showed an average overcorrection of 6.3 and 7.6 PD at near and far, respectively. A statistically significant difference was observed between the two groups (p<0.05). Factors such as the age of onset of strabismus, age at the time of surgery, the interval from the onset of strabismus to surgery, the preoperative angle of deviation, the dissociated vertical deviation, amblyopia, anisometropia and vertical strabismus had no influence on the undercorrection of X(T) patients (p>0.05).ConclusionsOf the many factors that might influence the surgical results of X(T) patients, the angle of deviation during the initial postoperative period is the most important factor.
PurposeTo evaluate factors that can influence the prevalence of amblyopia in children with anisometropia.MethodsWe retrospectively reviewed the records of 63 children 2 to 13 years of age who had anisometropic amblyopia with a difference in the refractive errors between the eyes of at least two diopters (D). The type of anisometropia (myopia, hyperopia, and astigmatism), degree of anisometropia (<2-3 D, <3-4 D, or >4 D), best corrected visual acuity (BCVA) of the amblyopic eye at the time of initial examination, BCVA differences between sound and amblyopic eyes, whether or not occlusion therapy was performed, compliance with occlusion therapy, and the patient's age when eyeglasses were first worn were investigated.ResultsThere was an increase in the risk of amblyopia with increased magnitude of anisometropia (p=0.021). The prevalence of amblyopia was higher in the BCVA <20/40 group and in patients with BCVA differences >4 lines between sound and amblyopic eyes (p=0.008 and p=0.045, respectively). There was no statistical relationship between the prevalence of amblyopia and the type of anisometropia or the age when eyeglasses were first worn. Poor compliance with occlusion therapy was less likely to achieve successful outcome (p=0.015).ConclusionsEyes with poor initial visual acuities of <20/40, a high magnitude of anisometropia, and a >4 line difference in the BCVA between sound and amblyopic eyes at the initial visit may require active treatment.
PurposeWe wanted to examine the effect of graded recession and anteriorization of the inferior oblique muscle on patients suffering from unilateral superior oblique palsy.MethodsInferior oblique muscle graded recession and anteriorization were performed on twenty-two patients (22 eyes) with unilateral superior oblique palsy. The recession and anteriorization were matched to the degree of inferior oblique overaction and hypertropia. The inferior oblique muscle was attached 4 mm posterior to the temporal border of the inferior rectus muscle in six eyes, 3 mm posterior in five eyes, 2 mm posterior in five eyes, 1 mm posterior in five eyes, and parallel to the temporal border in one eye.ResultsThe average angle of vertical deviation prior to surgery was 11.3±3.9 prism diopters (PD). The total average correction in the angle of vertical deviation after surgery was 10.8±3.8 PD. In the parallel group, the average reduction was 14 PD. After surgery, normal inferior oblique muscle action was seen in eighteen of twenty-two eyes (81.8%).ConclusionsGraded recession and anteriorization of the inferior oblique muscle is thought to be an effective surgical method to treat unilateral superior oblique palsy of less than 15 PD.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.