[Early age-specific changes in the accommodation volume]

Area of Science:

• Ophthalmology and Optometry
• Pediatric Vision Science

Background:

• Understanding visual development in children is crucial for identifying potential refractive errors and visual impairments.
• Accommodation, the eye's ability to change focus, plays a vital role in visual acuity and development during childhood and adolescence.

Purpose of the Study:

• To determine the age-related changes in the amplitude of accommodation in children and adolescents.
• To compare the accommodation volume between myopic and emmetropic children.
• To establish normative data for accommodation volume in a pediatric population.

Main Methods:

• A cohort of 475 patients aged 6 to 16 years underwent vision testing.
• The AKT-02 device was used to measure the nearest and furthest points of clear vision.
• Landolt's ring optotype for 0.7 vision acuity was utilized in the assessment.

Main Results:

• Mean accommodation volume increased from 9.29 diopters at age 6 to a peak of 12.25 diopters at age 13.
• Accommodation volume gradually decreased to 10.0 diopters by age 16.
• Myopic children exhibited a 0.75 diopter reduction in accommodation volume compared to emmetropic children.

Conclusions:

• Accommodation volume follows a distinct developmental trajectory in children, peaking in early adolescence.
• The findings suggest a potential link between reduced accommodation and myopia development in pediatric populations.
• This study provides valuable normative data for pediatric accommodation, aiding in clinical assessments.