Vergence Profile and Prevalance of Non-Strabismic Vergence Anomalies Among School Children in Abia State, Nigeria
| Autor: | Samuel Otabor Wajuihian, Rekha Hansraj, Uchenna C. Atowa |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Male
Visual acuity Adolescent Convergence insufficiency Epidemiology Visual Acuity Nigeria Vergence Refraction Ocular 03 medical and health sciences Ocular Motility Disorders 0302 clinical medicine Esophoria Prevalence Humans Medicine Cover test 030212 general & internal medicine Child Exophoria business.industry Accommodation Ocular Fusional vergence Convergence Ocular medicine.disease Subjective refraction Ophthalmology Cross-Sectional Studies 030221 ophthalmology & optometry Female medicine.symptom business Demography |
| Zdroj: | Ophthalmic Epidemiology. 26:121-131 |
| ISSN: | 1744-5086 0928-6586 |
| DOI: | 10.1080/09286586.2018.1532523 |
| Popis: | PURPOSE To determine the prevalence of non-strabismic vergence anomalies and their relationship with age, gender, and school level in children aged 10-16 years Method: A cross-sectional study was conducted among 537 children (255 male, 282 females; mean age 13.0 ± 2.0, years) selected from nine schools using stratified, cluster, and random sampling. The participants completed a Convergence Insufficiency Symptom Survey (CISS) and eye examinations, including the measurement of visual acuity, non-cycloplegic refraction, cover test, near point of convergence, fusional vergences, accommodative functions, and ocular health evaluation. All binocular tests were performed following the subjective refraction with the corrective lenses in place, if prescribed. RESULTS The prevalence of low suspect, high suspect, and definite convergence insufficiency was 9.6%, 5.8%, and 4.1%, respectively. Other prevalence estimates included convergence excess (2.9%), fusional vergence dysfunction (2.6%), basic exophoria (1.7%), basic esophoria (2.8%), divergence insufficiency (0.8%), and divergence excess (0.6%). The prevalence of high suspect (p |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|