Purpose <p>This study aimed to evaluate the effectiveness of a novel mechanical flipper in improving accommodative function in myopic School-age children, particularly in reducing accommodative lag and observing changes in refractive error. Additionally, the study explored the device’s impact on accommodative amplitude (AA) and binocular accommodative facility (BAF).</p> Methods <p>18 myopic elementary school children in Taiwan were randomly assigned to either the treatment group (n = 10) or the control group (n = 8). The treatment group underwent a 4-week vision training program using the novel mechanical flipper 4 times per week, for 20&#xa0;min per session, while the control group received no training. Before and after the training, monocular subjective refraction, the fused cross cylinder (FCC) method, the minus-lens-to-blur method, and flipper were used to measure refractive error, accommodative lag, AA, and BAF, respectively.</p> Results <p>After training, the treatment group showed significant improvements: accommodative lag decreased from 0.25 ± 0.26 diopter (D) to 0.00 ± 0.29D (p = 0.032), AA increased significantly (OculusDexter, OD: from 9.90 ± 2.50D to 12.55 ± 2.70D, p = 0.005; OculusSinister, OS: from 10.05 ± 3.49D to 12.45 ± 2.39D, p = 0.050), and BAF improved from 10.90 ± 2.77 cycles per minute (cpm) to 16.50 ± 3.60&#xa0;cpm (p &lt; 0.001). No significant changes were observed in refractive error or in the control group.</p> Conclusion <p>The novel mechanical flipper effectively improves accommodative lag, AA, and BAF in myopic children, providing a potential tool for myopia control.</p>