Abstract
PURPOSE: To report normative data on visual acuity (VA) for near and distance, refraction, ocular alignment, ocular motility and stereo acuity in a cohort of children aged 4.5-7 years.
METHODS: A total of 950 children with normal development from the municipality of Roskilde, Denmark, were invited to participate in an ophthalmic cross-sectional population-based survey, of which 445 children in the age of 54-87 months participated with a complete ocular examination including cycloplegia. Visual acuity (VA) was tested using Kay Picture charts and notified in logMAR units.
RESULTS: Mean distance VA was 0.010 logMAR [standard deviation (SD): 0.048] in right eye, and near VA in right eye was 0.012 logMAR (SD: 0.054), with a nonsignificant difference between right and left eye in both parameters (paired t-test, p = 0.15 and p = 0.08, respectively). Amblyopia was found in 12 children (2.7%), mainly related to refractive errors. The mean refractive error of right eye was +1.75 D, and significant hyperopia (greater than +3.0 D) was found in 7.9%. No myopia (greater than or equal to -0.5 D) was found, astigmatism (>1 D) was seen in 4.3%. Manifest strabismus was present in 1.6%, and heterophoria in 4.0%. Reduced or absent stereo acuity was present in 35 children (7.9%) and was related to a reduced VA, refractive error and strabismus.
CONCLUSION: Ophthalmic data of 445 normally developed children are presented, supplementing previous reported normative data in children. We found a relatively high prevalence of amblyopia and of hyperopia, while myopia was not found, confirming previous studies that myopia is not developing at early age in Danish children.
Original language | English |
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Journal | Acta Ophthalmologica |
Volume | 96 |
Issue number | 4 |
Pages (from-to) | 379-383 |
ISSN | 1755-375X |
DOIs | |
Publication status | Published - Jun 2018 |
Keywords
- Adolescent
- Amblyopia/diagnosis
- Child
- Child, Preschool
- Cross-Sectional Studies
- Denmark/epidemiology
- Female
- Follow-Up Studies
- Humans
- Male
- Ocular Motility Disorders/diagnosis
- Prevalence
- Refraction, Ocular/physiology
- Refractive Errors/diagnosis
- Risk Factors
- Vision Screening/methods
- Visual Acuity