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Accommodative lag using dynamic retinoscopy: age norms for school-age children
Julie F McClelland1, Kathryn J Saunders
1Vision Science Research Group, School of Biomedical Sciences, University of Ulster, Londonderry, Northern Ireland. JF.McClelland@ulster.ac.uk
Summary
This study establishes age-appropriate norms for accommodative function in children aged 4-15 using Nott dynamic retinoscopy (DR). The findings provide crucial reference data for assessing children's visual development and identifying potential issues with accommodation.
Area of Science:
- Ophthalmology
- Pediatric Optometry
- Vision Science
Background:
- Nott dynamic retinoscopy (DR) offers an objective and rapid method for assessing accommodative function.
- Currently, there is a lack of normative data for accommodative function in school-aged children utilizing Nott DR.
Purpose of the Study:
- To establish age-specific normative data for accommodative responses in school-aged children using Nott dynamic retinoscopy (DR).
- To provide a reference for practitioners and researchers to evaluate accommodative function in children.
Main Methods:
- Accommodative responses were measured in 125 children (ages 4-15) using Nott DR.
- Participants had corrected refractive errors and good visual acuity, with accommodative demands set at 4 D, 6 D, and 10 D.
Main Results:
- No significant differences in accommodative responses were found across different age groups.
- Mean accommodation lag was 0.30 D at 4 D, 0.74 D at 6 D, and 2.50 D at 10 D.
- Normal accommodation ranges (95% CI) were established for each demand level.
Conclusions:
- A comprehensive table of mean lags and normal ranges for Nott DR accommodative responses in children (4-15 years) has been generated.
- These normative data enable clinicians to assess if measured accommodative responses fall within expected limits for children.