Related Experiment Video
Updated: Mar 13, 2026
08:27
Quantification of Oculomotor Responses and Accommodation Through Instrumentation and Analysis Toolboxes
Published on: March 3, 2023
1.5K
Amplitude of Accommodation in Schoolchildren
Victor Delpizzo Castagno1, Manuel Augusto Pereira Vilela1, Rodrigo Dalke Meucci2
1a Department of Specialized Medicine - Ophthalmology , Federal University of Pelotas , Pelotas , Brazil.
Current Eye Research
|October 19, 2016
Summary
This study evaluated Amplitude of Accommodation (AA) in schoolchildren, finding no significant differences by gender or economic status. It suggests using median and percentiles for age-specific AA norms, highlighting the need for further research.
Area of Science:
- Ophthalmology
- Pediatric Optometry
- Vision Science
Background:
- Hofstetter's equations for Amplitude of Accommodation (AA) have limitations, especially for children under 10.
- Accurate AA measurements are crucial for understanding visual development and function in children.
Purpose of the Study:
- To evaluate Amplitude of Accommodation (AA) in schoolchildren aged 6-16 years.
- To analyze AA variations based on age, gender, economic status, and time of day.
- To determine the prevalence of accommodative insufficiency in the study population.
Main Methods:
- A cross-sectional study involving 867 schoolchildren (aged 6-16) in Pelotas, Brazil.
- Subjective refraction using monocular fogging to achieve best visual acuity (20/25).
- Amplitude of Accommodation (AA) assessed via the push-up method.
Main Results:
- Median AA for 6-16 year olds was 14.3D, with variations across age groups.
- No significant differences in median AA were found regarding gender, time of examination, or economic status.
- 2.8% of children exhibited AA more than 2D below Hofstetter's reference value, indicating potential accommodative insufficiency.
Conclusions:
- This study provides AA data for a large pediatric sample, contributing to normative values.
- Recommends using median and percentiles for age-specific AA standards to mitigate outlier effects.
- Emphasizes the need for further research with precise measurements and large samples to establish definitive clinical AA standards.
