I read with great interest the article titled "Multifocal contact lenses and defocus incorporated multiple segments lenses slow myopic progression in Chinese children with high myopia" by Li et al., recently published in the Journal of Optometry.1 The authors provide valuable clinical insights into the efficacy of different optical interventions for highly myopic children, a demographic that requires urgent attention. However, I would like to draw the authors' and readers' attention to a critical numerical inconsistency regarding the sample sizes reported in the study.

In the "Methods" section of the Abstract, the sample sizes are reported as follows: "Selected participants were those treated with DIMS (N = 81), MFSCLs (DISC, N = 60), or single-vision spectacles (SVLs, N = 108, control group)." Conversely, in the "Group and follow-up" subsection of the Materials and methods in the main text, it explicitly states: "A total of 249 eyes were included: 108 in the DIMS group, 60 in the MFSCLs group, and 81 in the SVLs control group." Furthermore, this distribution (SVLs, n = 81; DIMS, n = 108) is consistently reflected in Table 1, Table 2, and Table 3. It appears that the sample sizes for the DIMS and SVLs groups were inadvertently transposed in the abstract. Since the abstract is the most highly visible and frequently read portion of any manuscript, such discrepancies can easily mislead readers and affect the precise interpretation of the study’s statistical power.

I kindly request the authors to clarify this discrepancy and, if necessary, issue a formal corrigendum to correct the abstract. Thank you for this otherwise excellent contribution to the field of myopia management.

Sincerely,

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