Randomization
SVS
REFRACTIVE ERROR
Eligible participants enrolled in the study were assigned to receive single-vision spectacles (SVS) only or photobiomodulation (PBM) therapy with SVS at a 1:1 ratio using a randomization sequence produced by Excel. The mechanism used to implement the random allocation sequence was sequentially numbered containers by random envelopes. The enrolled subjects were randomly divided into two groups based on random numbers placed in envelopes. The random numbers were generated by Excel, and the aim was to achieve balanced treatment groups based on their baseline right-eye refractive error, mean age and gender. After all 50 participants were enrolled, the random envelopes were opened to indicate the group assignment. Researchers who were assessing outcomes and performers (for cycloplegic autorefraction and AL measurements) were still blinded to group allocation, but participants and care providers were not blinded after the random envelopes were opened.