Reduction in Accommodative Response of Schoolchildren by a Double-Mirror System

Area of Science:

• Ophthalmology
• Optometry
• Pediatric Vision

Background:

• Children's accommodative response is crucial for visual development.
• Extended near work is a risk factor for myopia progression.
• Novel optical systems are being explored to mitigate visual strain.

Purpose of the Study:

• To evaluate the application of a double-mirror system (DMS) for extending viewing distance.
• To investigate the accommodative response of schoolchildren using a DMS.
• To assess the potential of DMS in managing visual demands for children.

Main Methods:

• Fifty-seven schoolchildren (7-12 years old) participated.
• Visual function and refractive status were assessed.
• Accommodative responses were measured using an open-field autorefractor at 0.4m, 2.285m, and through a DMS.

Main Results:

• No significant difference in accommodative response was found between viewing at 2.285m and through the DMS (p > 0.05).
• Significant differences in accommodative response were observed between near viewing (0.4m) and both 2.285m and DMS viewing.
• The DMS effectively simulated a more distant viewing condition.

Conclusions:

• The double-mirror system (DMS) provides similar accommodative responses to standard distance viewing.
• DMS extends effective viewing distance, promoting accommodative relaxation.
• This technology shows promise for myopia control strategies in children.