Shorten Myopic Axial Length with Repeated Low-lever Laser Light Therapy

Purpose: This study was to confirm that repeated low-lever laser light therapy (LLLT) could control myopic axial length (AL) elongation. Methods: Twenty myopia, 5 to 13 years old, were included in this study. All subjects kept daily repeated therapy with LLLT for mean 3 months; According to the baseline AL (> 24.40 mm or not), and ages (> 10 years old or not), we built two age groups and two AL groups. The AL between baseline and follow-up as well as different groups were all tested by SPSS 26.0, respectively. Results: 85% and 75% of AL were shortened for the right and left compared with those of baseline, respectively. The follow-up right and left AL were both significantly shortened (P=.002, P=.003, respectively) from baseline mean right AL 24.52 ± 1.01 mm, left AL 24.51 ± 0.96 mm, to 24.41 ± 0.98 mm (-0.11 mm right AL shortened amount) and 24.42 ± 0.93 (-0.09 mm left AL shortened amount), respectively. Long baseline AL group was significantly (P=.02, P=.03) shortened more AL than those of small baseline AL group for both right and left AL (-0.17 mm versus -0.05 mm, P <.001, respectively). From age group aspect, although it was also significant difference changed (shortened) for right AL (P=.008), but not for left AL (P=.051). Conclusions: LLLT could control myopia axial length progression.