scholarly journals Prevalence of Heterophoria in Tibetan Grade-One Students: The Lhasa Childhood Eye Study

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Han Su ◽  
Jing Fu ◽  
Weiwei Chen ◽  
Zhaojun Meng ◽  
Lei Li ◽  
...  
Keyword(s):  
Elementary Schools ◽  
Cluster Sampling ◽  
Ocular Motility ◽  
School Based ◽  
Near Visual Acuity ◽  
The Mean ◽  
Maddox Rod ◽  
Grade One ◽  
Distance Fixation ◽  
Cover Test

Introduction. The study aims to explore the prevalence of heterophoria and associate factors in Tibetan grade-one students. Methods. The Lhasa Childhood Eye Study (LCES) is a school-based cohort study. 1942 grade-one students from 7 elementary schools were randomly sampled by stratified cluster sampling. Ocular examinations were performed in participants, including ocular motility, distance and near visual acuity, cycloplegic autorefraction, and stereoacuity. The near (33 cm) and distance (6 m) fixation cover test was used to differentiate orthophoria, heterophoria, and heterotropia, and the magnitude of the phoria was measured by the Maddox rod and prisma. Results. Of 1856 grade-one students completing all the ocular examinations, 1852 participants finished the ocular alignment test. The mean age was 6.82 ± 0.46 years (range 6∼10 years); 981 (52.97%) were males, and 871 (47.03%) were females. The prevalence of phoria was 22.89% (n = 424). At distance fixation, the prevalence of heterophoria, exophoria, and esophoria was 4.64%, 4.21%, and 0.43% separately, while at near fixation, the prevalence was 22.73%, 22.35%, and 0.38%. No vertical phoria was detected. The mean magnitude of heterophoria at near and distance fixation was −7.63 ± 5.15 PD (exo: −7.83 ± 4.91 PD, eso: +5.67 ± 3.61 PD) and −4.84 ± 5.94 PD (exo: −6.26 ± 4.20 PD, eso: +8.13 ± 3.04 PD). The prevalence of esophoria was associated with hyperopia (OR = 6.38, 95% CI: 1.15–35.28, P  = 0.03; OR = 5.42, 95% CI: 1.04–28.24, P  = 0.04) and amblyopia (OR = 16.02, 95% CI: 1.81∼141.96, P  = 0.01; OR = 11.37, 95% CI: 1.34∼96.52, P  = 0.03) at near and distance fixation. The prevalence of exophoria was associated with myopia at near fixation (OR = 2.43, 95% CI: 1.47–4.00, P <0.01). In the near heterophoria group, the proportion of children with abnormal stereoacuity was 23.26% (n = 97), significantly higher (χ2 = 5.70, P  = 0.017) than that in orthophoria (17.99%, n = 244). Conclusions. In Lhasa, grade-one pupils have a lower prevalence of heterophoria. Near exophoria was associated with myopia, while esophoria was related to hyperopia and amblyopia both near and distance. Heterophoria may be one of the affected factors for reducing stereoacuity.

scholarly journals Ambliopia anisometropia

2016 ◽  
Vol 8 (2) ◽  
Author(s):  
Laya Rares
Keyword(s):  
Ophthalmological Examination ◽  
Blurred Vision ◽  
Anisometropic Amblyopia ◽  
Main Complaint ◽  
Maddox Rod ◽  
The Right ◽  
Test Cover ◽  
Myopic Astigmatism ◽  
Distance Fixation ◽  
Cover Test

Abstract: Anisometropic amblyopia is blurred vision due to refractive anomaly without any anatomical disorders of the eyes. It is frequently found among children in their growth and development periods. The prognosis depends on the ambylopia severity, management, patient’s obedience to the management, and age. We report a case of anisometropic amblyopia in a 8-year-old boy with his main complaint was blurred vision of both eyes. The ophthalmological examination showed the visual acuity of both eyes 6/40, PH 6/9. Several tests that showed normal results were as follows: eyeball movements to all directions; pupil responses to light; Hischberg test; cover test dan cover uncover test at near and far distance fixation; alternate cover test; and worth four dots and Maddox rod tests. Cyclopegical refraction with streak retinoscopy at 50 cm distance resulted in right eye S-4.00 C-3.00 x1800 6/9 and left eye S-1.25 C-3.25 x1800 6/7.5; autorefraction of right eye S-4.50 C-3.25 x70 and of left eye S-1.25 C-4.25 x1710. Anterior and posterior segments of both eyes were normal. Conclusion: In this case, the diagnosis was confirmed as anisometropic amblyopia and compound myopic astigmatism of the right and left eyes. The prognosis was dubia ad bonam. The patient was treated with maximal correction glasses and observed for the first four weeks, and then would be evaluated continuously untill the vision was normal. Keywords: amblyopia anisometropia, vision, refraction anomalyAbstrak: Ambliopia anisometropia merupakan gangguan penglihatan akibat kelainan refraksi tanpa disertai adanya kelainan anatomik pada mata yang sering terjadi pada masa perkembangan anak. Prognosis sangat tergantung pada derajat ambliopia, penanganan, kepatuhan pasien terhadap penanganan, dan usia pasien. Kami melaporkan kasus ambliopia anisometropia pada seorang anak berusia 8 tahun, dengan keluhan utama penglihatan kedua mata kabur. Dari pemeriksaan oftalmologik didapatkan visus ODS 6/40, PH 6/9. Beberapa pemeriksaan yang dilakukan memperlihatkan hasil normal, yaitu: pergerakan bola mata ke segala arah; respon pupil terhadap cahaya; Hischberg test; cover test dan cover uncover test pada fiksasi jarak dekat dan jauh; alternate cover test; serta worth four dots test dan Maddox rod test. Pemeriksaan refraksi sikloplegik dengan streak retinoscopy pada jarak 50 cm didapatkan mata kanan S-4,00 C-3,00 x1800 6/9 dan mata kiri S-1,25 C-3,25 x1800 6/7,5 dan pemeriksaan autorefraksi mata kanan S-4,50 C-3,25 x70 dan mata kiri S-1,25 C-4,25 x1710. Pemeriksaan segmen anterior dan posterior mata kanan dan kiri dalam batas normal. Simpulan: Diagnosis pada kasus ini ialah ambliopia anisometropia ODS dan astigmatisma miopikus kompositus ODS, dengan prognosis dubia ad bonam. Terapi yang diberikan ialah kacamata koreksi maksimal dan diobservasi selama 4 minggu pertama, dan akan dievaluasi terus sampai ketajaman penglihatan normaL. Kata kunci: ambliopia anisometropia, ketajaman penglihatan, kelainan refraksi

scholarly journals The efficacy of superior oblique posterior tenectomy in the treatment of A-pattern exotropia without ocular intorsion: A retrospective study

2019 ◽  
Author(s):  
Yan Wei ◽  
Ling-Yan Dong ◽  
Xiao-li Kang ◽  
Pei-quan Zhao
Keyword(s):  
Rectus Muscle ◽  
Ocular Motility ◽  
Ocular Torsion ◽  
Primary Position ◽  
Horizontal Alignment ◽  
Pattern Deviation ◽  
The Mean ◽  
Fundus Photographs ◽  
Cover Test ◽  
Superior Oblique

Abstract Background: Superior oblique weakening is a common method to treat A-pattern strabismus. This study aims to evaluate the surgical results of the bilateral superior oblique posterior tenectomy procedure to treat A-pattern strabismus patients who had bilateral superior oblique overaction without objective ocular intorsion. Methods: The records of 18 consecutive patients who underwent surgery of superior oblique posterior tentomy close to its insertion with superior oblique overaction (SOOA)-associated A-pattern strabismus between September 1, 2015 and August 31, 2018 were retrospectively reviewed. Ocular alignment, objective torsion, A-pattern and ocular motility were assessed. Ocular alignment was measured in the primary position, 25° upgaze, and 25° downgaze using the prism bar cover test, and torsion was measured using fundus photographs. Results: A total of 18 patients (mean age: 15 years; 6 female, 12 male) underwent bilateral superior oblique posterior tenectomy and simultaneous horizontal rectus muscle surgery were included. The mean preoperative A-pattern deviation was 15 PD and the mean postoperative A-pattern deviation was 2.25 PD with a mean reduction of 12.75 PD. The mean preoperative superior oblique overaction was 2.28 and the mean postoperative superior oblique overaction was 0.43 with a mean reduction of 1.85. There was no significant correlation between the ocular torsional, vertical and horizontal alignment change and the superior oblique posterior tenectomy procedure. Conclusions: Superior oblique posterior tenectomy surgery selectively improved the A-pattern and superior oblique overaction but not affect the primary position vertical and horizontal deviation, as well as the ocular torsion. It is an effective procedure to treat the mild to moderate superior oblique overaction (SOOA)-associated A pattern strabismus without ocular intorsion.

scholarly journals The efficacy of superior oblique posterior tenotomy in the treatment of A-pattern strabismus without ocular intorsion: A retrospective study

2019 ◽  
Author(s):  
Yan Wei ◽  
Ling-Yan Dong ◽  
Xiao-li Kang
Keyword(s):  
Rectus Muscle ◽  
Ocular Motility ◽  
Ocular Torsion ◽  
Primary Position ◽  
Horizontal Alignment ◽  
Pattern Deviation ◽  
The Mean ◽  
Fundus Photographs ◽  
Cover Test ◽  
Superior Oblique

Abstract Background: Superior oblique weakening is a common method to treat A-pattern strabismus. This study aim to evaluate the surgical results of superior oblique posterior tenotomy procedures to treat A-pattern strabismus patients who had bilateral superior oblique overaction without ocular objective intorsion.Methods: The records of 18 consecutive patients who underwent surgery of superior oblique posterior tenotomy close to its insertion with superior oblique overaction (SOOA)-associated A-pattern strabismus between September 1, 2015 and August 31, 2018 were retrospectively reviewed. Ocular alignment, objective torsion, A-pattern and ocular motility were assessed. Ocular alignment was measured in the primary position, 25° upgaze, and 25° downgaze using the prism bar cover test, and torsion was measured using fundus photographs. Results: A total of 18 patients (mean age: 15 years; 6 female, 12 male) underwent bilateral superior oblique posterior tenotomy and simultaneous horizontal rectus muscle surgery were included. The mean preoperative A-pattern deviation was 15 PD and the mean postoperative A-pattern deviation was 2.25 PD with a mean reduction of 12.75 PD. The mean preoperative superior oblique overaction was 2.28 and the mean postoperative superior oblique overaction was 0.43 with a mean reduction of 1.85. There was no significant correlation between the ocular torsional, vertical and horizontal alignment change and the superior oblique posterior tenotomy procedure. Conclusions: Superior oblique posterior tenotomy surgery selectively improved the A-pattern and superior oblique overaction but not affect the primary position vertical and horizontal deviation, as well as the ocular torsion. So it is an effective procedure to treat the mild to moderate superior oblique overaction (SOOA)-associated A pattern strabismus without ocular intorsion.

scholarly journals The efficacy of superior oblique posterior tenotomy in the treatment of A-pattern strabismus without ocular intorsion: A retrospective study

2020 ◽  
Author(s):  
Yan Wei ◽  
Ling-Yan Dong ◽  
Pei-quan Zhao ◽  
Xiao-li Kang
Keyword(s):  
Rectus Muscle ◽  
Ocular Motility ◽  
Ocular Torsion ◽  
Vertical Alignment ◽  
Primary Position ◽  
Pattern Deviation ◽  
The Mean ◽  
Fundus Photographs ◽  
Cover Test ◽  
Superior Oblique

Abstract Background: Superior oblique weakening is a common method to treat A-pattern strabismus. This study aims to evaluate the surgical results of the bilateral superior oblique posterior tenectomy procedure to treat A-pattern strabismus patients who had bilateral superior oblique overaction without objective ocular intorsion. Methods: The records of 18 consecutive patients who underwent surgery of superior oblique posterior tenectomy close to its insertion with superior oblique overaction (SOOA)-associated A-pattern strabismus between September 1, 2015 and August 31, 2018 were retrospectively reviewed. Ocular alignment, objective torsion, A-pattern and ocular motility were assessed. Ocular alignment was measured in the primary position, 25° upgaze, and 25° downgaze using the prism bar cover test, and torsion was measured using fundus photographs. Results: A total of 18 patients (mean age: 15 years; 6 female, 12 male) underwent bilateral superior oblique posterior tenectomy and simultaneous horizontal rectus muscle surgery were included. The mean preoperative A-pattern deviation was 15 PD and the mean postoperative A-pattern deviation was 2.25 PD with a mean reduction of 12.75 PD. The mean preoperative superior oblique overaction was 2.28 and the mean postoperative superior oblique overaction was 0.43 with a mean reduction of 1.85. There was no significant correlation between the ocular torsional, vertical alignment change and the superior oblique posterior tenectomy procedure. Conclusions: Superior oblique posterior tenectomy surgery selectively improved the A-pattern and superior oblique overaction but not affect the primary position vertical deviation, as well as the ocular torsion. It is an effective procedure to treat the mild to moderate superior oblique overaction associated A pattern strabismus without ocular intorsion.

scholarly journals Prevalence and associated risk factors for childhood strabismus in Lhasa, Tibet, China: a cross-sectional, school-based study

2020 ◽  
Author(s):  
Hailong He ◽  
Jing Fu ◽  
Zhaojun Meng ◽  
Weiwei Chen ◽  
Lei Li ◽  
...  
Keyword(s):  
Risk Factors ◽  
Risk Factor ◽  
Primary Schools ◽  
Cross Sectional ◽  
School Based ◽  
Significant Difference ◽  
The Mean ◽  
Associated Risk Factors ◽  
Grade One ◽  
Epidemiology Studies

Abstract Background: To estimate the prevalence of strabismus and associated risk factors among grade one school children in Lhasa, Tibet, China.Methods: The Lhasa Childhood Eye Study (LCES) was a cross-sectional, school-based childhood study conducted in Grade one students from primary schools in Lhasa, Tibet, China. Comprehensive ophthalmic examinations and basic systematic examinations were evaluated. A questionnaire survey contained information about children, as well as parents’ information was sent to the corresponding parents of eligible children. The prevalence of strabismus and its 95% confidence interval was estimated. Univariate and multivariate logistic regression analyses were conducted to determine the associated risk factors.Results: A total of 1942 eligible grade one students were enrolled, of which 1856 participants completed all procedures. The average age was 6.83±0.46 years, 53% of participants were boys and 1762 were the Tibetan Minority. Over all, the prevalence of strabismus was 68/1856(3.7%) (95%CI: 2.81,4.52), with no difference between the ages, genders, ethnics and BMI, while tilt one's head when writing may be a risk factor for strabismus (P=0.004). Strabismus students had the mean best corrected visual acuity 0.16±0.28(LogMAR), over 50% patients with esotropia are hyperopia, participants who have stereopsis impairments showed a significant difference between esotropia and exotropia (P=0.026).Conclusions: The prevalence of strabismus in LCES was 3.7%, higher than previous reports from Chinese childhood epidemiology studies. Strabismus is a common contributing factor to amblyopia. Tilt one's head when writing may be a risk factor. Patients with esotropia are more likely to affect stereopsis and be the refractive state of hyperopia.

scholarly journals Prevalence and associated risk factors for childhood strabismus in Lhasa, Tibet, China: a cross-sectional, school-based study

2020 ◽  
Author(s):  
Hailong He ◽  
Jing Fu ◽  
Zhaojun Meng ◽  
Weiwei Chen ◽  
Lei Li ◽  
...  
Keyword(s):  
Risk Factors ◽  
Risk Factor ◽  
Primary Schools ◽  
Cross Sectional ◽  
School Based ◽  
Significant Difference ◽  
The Mean ◽  
Associated Risk Factors ◽  
Grade One ◽  
Epidemiology Studies

Abstract Background: To estimate the prevalence of strabismus and associated risk factors among grade one school children in Lhasa, Tibet, China. Methods: The Lhasa Childhood Eye Study (LCES) was a cross-sectional, school-based childhood study conducted in Grade one students from primary schools in Lhasa, Tibet, China. Comprehensive ophthalmic examinations and basic systematic examinations were evaluated. A questionnaire survey contained information about children, as well as parents’ information was sent to the corresponding parents of eligible children. The prevalence of strabismus and its 95% confidence interval was estimated. Univariate and multivariate logistic regression analyses were conducted to determine the associated risk factors. Results: A total of 1942 eligible grade one students were enrolled, of which 1856 participants completed all procedures. The average age was 6.83±0.46 years, 53% of participants were boys and 1762 were the Tibetan Minority. Over all, the prevalence of strabismus was 68/1856(3.7%) (95%CI: 2.81,4.52), with no difference between the ages, genders, ethnics and BMI, while tilt one's head when writing may be a risk factor for strabismus ( P =0.004). Strabismus students had the mean best corrected visual acuity 0.16±0.28(LogMAR), over 50% patients with esotropia are hyperopia, participants who have stereopsis impairments showed a significant difference between esotropia and exotropia ( P= 0.026). Conclusions: The prevalence of strabismus in LCES was 3.7%, higher than previous reports from Chinese childhood epidemiology studies. Strabismus is a common contributing factor to amblyopia. Tilt one's head when writing may be a risk factor. Patients with esotropia are more likely to affect stereopsis and be the refractive state of hyperopia.

A comparison of soil sampling procedures used to monitor soil fertility in permanent pastures

Soil Research ◽  
1984 ◽  
Vol 22 (1) ◽  
pp. 81 ◽  
Author(s):  
DK Friesen ◽  
GJ Blair
Keyword(s):  
Sampling Method ◽  
Nutrient Status ◽  
Temporal Variations ◽  
Cluster Sampling ◽  
Soil Test ◽  
Sampling Strategies ◽  
Grazed Pasture ◽  
The Mean ◽  
Sampling Procedures ◽  
Bray 1

Soil testing programs are often brought in disrepute by unexplained variability in the data. The deposition of dung and urine onto grazed pasture brings about marked variation in the chemical status of soils which contributes to this variability. A study was undertaken to compare a range of sampling procedures to estimate Colwell-P, Bray-1 P, bicarbonate K and pH levels in adjacent low and high P status paddocks. The sampling strategies used consisted of 75 by 50 m grids; whole and stratified paddock zig-zag and cluster (monitor plot) samplings. Soil test means for the various parameters did not vary among sampling methods. The number of grid samples required to estimate within 10% of the mean varied from 121 for Bray-1 P down to 1 for soil pH. Sampling efficiencies were higher for cluster sampling than for whole paddock zig-zag path sampling. Stratification generally did not improve sampling efficiency in these paddocks. Soil test means declined as sampling depth increased, but the coefficient of variation remained constant for Colwell-P and pH. The results indicate that cluster sampling (monitor plots) is the most appropriate procedure for estimating the nutrient status of grazed pastures. This sampling method enables a more accurate measure to be taken of the nutrient status of a paddock and should allow more reasonable estimates to be made of the temporal variations in soil test.

scholarly journals OCT-Angiography Findings in Patients with Amblyopia: Comparison between Healthy Controls, Treatment-Responsive, and Treatment-Unresponsive Amblyopic Patients

Diagnostics ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1751
Author(s):  
Annabella Salerni ◽  
Gloria Gambini ◽  
Chiara Fedeli ◽  
Ludovica Paris ◽  
Emanuele Crincoli ◽  
...  
Keyword(s):  
Linear Regression Analysis ◽  
Vascular Density ◽  
Ocular Motility ◽  
Ophthalmological Examination ◽  
Light Stimulation ◽  
Cross Sectional ◽  
Vascular Plexus ◽  
The Mean ◽  
Normal Controls ◽  
Expert Physician

There is no consensus on whether amblyopia affects the retinal vascular plexus and morphology. Previous studies focused on the differences between amblyopic patients and normal controls without evaluating amblyopic eyes after patching. To evaluate differences in the superficial vascular density of amblyopic eyes, normal eyes, and amblyopic eyes reaching normal BCVA after patch therapy, OCTA was used. All patients underwent a comprehensive ophthalmological examination, including visual acuity, refraction, ocular motility tests, and anterior and posterior segment examination. OCTA was performed by an expert physician using the Zeiss Cirrus 5000-HD-OCT Angioplex (Carl Zeiss, Meditec, Inc., Dublin, OH, USA). OCTA scans were performed using a 3 × 3 mm2 and 6 × 6 mm2 fovea-centered image setting. The mean outer macular vessel density in the previously amblyopic group was 19.15 ± 0.51%. This was statistically significantly higher than in both the amblyopic group (18.70 ± 1.14%) and the normal controls (18.18 ± 1.40%) (p = 0.014). The previously amblyopic group also significantly differed from both normal controls and amblyopic eyes with regards to the inner (p = 0.011), outer (p = 0.006), and full (p = 0.003) macular perfusion. Finally, linear regression analysis revealed that BCVA was linearly correlated to outer perfusion in amblyopic (p = 0.003) and ex amblyopic eyes (p < 0.001). Considering the cross-sectional nature of our study, from our results, we can only hypothesize a possible correlation between light stimulation and retinal vasculature development. However, further longitudinal studies are needed to support this hypothesis.

scholarly journals Building Healthy Communities: Creating Policy to Sustain Health-Related School Change

2018 ◽  
Vol 13 (3) ◽  
pp. 176-190
Author(s):  
Erin Elizabeth Centeio ◽  
Jeanne M. Barcelona ◽  
Kristen Kaszeta ◽  
Nate McCaughtry
Keyword(s):  
Elementary Schools ◽  
School Change ◽  
School Intervention ◽  
School Level ◽  
Healthy Communities ◽  
School Based ◽  
Control And Prevention ◽  
Health Related ◽  
Evidenced Based ◽  
The Impact

Many organizations including the Centers for Disease Control and Prevention and the National Academies of Science have called on schools to address childhood obesity and provide more opportunities for children to be active and eat healthier. This study discusses the impact that one comprehensive school program, Building Healthy Communities (BHC), had on school policy across 40 Midwest elementary schools. The study aim was to assess elementary schools that participated in the BHC whole-of-school intervention and examine the policy changes that took place during the year-long intervention, as well as proposed changes made as part of a sustainability plan. Findings indicated that evidenced-based tools can spur awareness of the need for health-based school change among administration, which in turn can prompt the adoption of school-level adherence policies. The intersection between school-based health policy and community-based youth programs is explored as an important part of comprehensive youth health promotion.

scholarly journals Investigating elementary school pupils’ proficiency in mastering English vocabulary

2014 ◽  
Vol 1 (1) ◽  
pp. 1
Author(s):  
Diana Achmad
Keyword(s):  
Elementary School ◽  
Elementary Schools ◽  
Language Learning ◽  
Writing Skills ◽  
Early Age ◽  
Vocabulary Test ◽  
Reading And Writing ◽  
Local Content ◽  
The Mean ◽  
Banda Aceh

English has been taught at elementary schools as one of the local content subjects. It is necessary to study English from an early age in order to achieve good mastery in it. To master English means to master the four skills in it and also the language aspects, including vocabulary. As one of the language aspects, vocabulary plays an important role in language learning. This study reports on pupils’ proficiency in mastering English vocabulary after three years of studying in elementary school. The writer chose 55 grade-four pupils of SD Methodist Banda Aceh as a sample for this study. They were given a vocabulary test related to reading and writing skills consisting of 26 items. The test was to be done in 20 minutes. After calculating the data, it was found that the mean score (x) of the pupils was 69.5, with the highest score at 92.3 and the lowest score at 26.9. More than 50% of the pupils could answer the questions correctly in less than 20 minutes. Only 4 out of the 55 pupils answered the questions less than 50% correctly and no one answered 100% correct. According to these results, this study showed that the pupils achieved good proficiency in vocabulary.

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