Factors linked to changes in eye length after repeated low-level red light treatment

Axial length changes after low-level red-light therapy showed a significant difference over 24 months (F = 16.12, P < 0.001).

• The amount of axial length change was significant at the 6-month follow-up, with a mean change of △AL = -0.16 ± 0.18.
• Longer baseline axial length and higher spherical equivalent refractive values were positively correlated with changes in axial length.
• Children with high myopia experienced greater axial regression compared to those with mild and moderate myopia.
• Age was positively correlated with changes in axial length.
• Combination with other myopia prevention and control measures was associated with changes in axial length at multiple follow-up points.
• Baseline corneal thickness, corneal curvature, and intraocular pressure were not correlated with changes in axial length.

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